Merge remote-tracking branch 'origin/bb-10.2-ext' into 10.3

mysql-test/r/create.result

@@ -488,13 +488,35 @@ d	date	YES		NULL
 e	varchar(1)	YES		NULL	
 f	datetime	YES		NULL	
 g	time	YES		NULL	
-h	longblob	YES		NULL	
+h	blob	YES		NULL	
 dd	time	YES		NULL	
 select * from t2;
 a	b	c	d	e	f	g	h	dd
 1	-7	7	2000-01-01	b	2000-01-01 00:00:00	05:04:03	yet another binary data	02:00:00
 2	-2	2	1825-12-14	a	2003-01-01 03:02:01	04:03:02	binary data	02:00:00
 drop table t1, t2;
+CREATE TABLE t1 (
+c_tinytext tinytext,
+c_text text,
+c_mediumtext mediumtext,
+c_longtext longtext
+);
+CREATE TABLE t2 AS SELECT
+ifnull(c_tinytext,   CAST('yet another binary data' AS BINARY)),
+ifnull(c_text,       CAST('yet another binary data' AS BINARY)),
+ifnull(c_mediumtext, CAST('yet another binary data' AS BINARY)),
+ifnull(c_longtext,   CAST('yet another binary data' AS BINARY))
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `ifnull(c_tinytext,   CAST('yet another binary data' AS BINARY))` tinyblob DEFAULT NULL,
+  `ifnull(c_text,       CAST('yet another binary data' AS BINARY))` blob DEFAULT NULL,
+  `ifnull(c_mediumtext, CAST('yet another binary data' AS BINARY))` mediumblob DEFAULT NULL,
+  `ifnull(c_longtext,   CAST('yet another binary data' AS BINARY))` longblob DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
 create table t1 (a tinyint, b smallint, c mediumint, d int, e bigint, f float(3,2), g double(4,3), h decimal(5,4), i year, j date, k timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, l datetime, m enum('a','b'), n set('a','b'), o char(10));
 create table t2 select ifnull(a,a), ifnull(b,b), ifnull(c,c), ifnull(d,d), ifnull(e,e), ifnull(f,f), ifnull(g,g), ifnull(h,h), ifnull(i,i), ifnull(j,j), ifnull(k,k), ifnull(l,l), ifnull(m,m), ifnull(n,n), ifnull(o,o) from t1;
 show create table t2;

mysql-test/r/ctype_utf8.result

@@ -11184,5 +11184,21 @@ SET NAMES utf8;
 CREATE TABLE t1 (a SET('a,bü'));
 ERROR 22007: Illegal set 'a,bü' value found during parsing
 #
+# MDEV-12607 Hybrid functions create wrong VARBINARY length when mixing character and binary data
+#
+SET sql_mode='';
+SET NAMES utf8;
+CREATE OR REPLACE TABLE t1 AS SELECT COALESCE('ßa',_binary 'a');
+SELECT * FROM t1;
+COALESCE('ßa',_binary 'a')
+ßa
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `COALESCE('ßa',_binary 'a')` varbinary(6) NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+SET sql_mode=DEFAULT;
+#
 # End of 10.3 tests
 #

mysql-test/r/func_hybrid_type.result

@@ -3500,5 +3500,17 @@ t2	CREATE TABLE `t2` (
 DROP TABLE t2;
 DROP TABLE t1;
 #
+# MDEV-12601 Hybrid functions create a column of an impossible type DOUBLE(256,4)
+#
+CREATE TABLE t1 (a DOUBLE(255,4),b DOUBLE(255,3));
+CREATE TABLE t2 AS SELECT COALESCE(a,b) FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `COALESCE(a,b)` double(255,4) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
+#
 # End of 10.3 tests
 #

mysql-test/r/func_str.result

@@ -4661,3 +4661,20 @@ DROP TABLE t1;
 #
 # End of 10.1 tests
 #
+#
+# Start of 10.3 tests
+#
+#
+# MDEV-12592 Illegal mix of collations with the HEX function
+#
+SET NAMES utf8;
+CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
+INSERT INTO t1 VALUES (0x09),('a');
+SELECT IF(a<' ',HEX(a),a) FROM t1 ORDER BY a;
+IF(a<' ',HEX(a),a)
+09
+a
+DROP TABLE  t1;
+#
+# End of 10.3 tests
+#

mysql-test/r/func_weight_string.result

@@ -57,7 +57,7 @@ create table t1 select weight_string(repeat('t',66000)) as w;
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `w` longblob DEFAULT NULL
+  `w` mediumblob DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 select weight_string(NULL);

mysql-test/r/gis-debug.result

@@ -381,11 +381,11 @@ POINT(0,0) MOD '0' LIMIT 0;
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `POINT(0,0)+'0'` longtext DEFAULT NULL,
+  `POINT(0,0)+'0'` tinytext DEFAULT NULL,
-  `POINT(0,0)-'0'` longtext DEFAULT NULL,
+  `POINT(0,0)-'0'` tinytext DEFAULT NULL,
-  `POINT(0,0)*'0'` longtext DEFAULT NULL,
+  `POINT(0,0)*'0'` tinytext DEFAULT NULL,
-  `POINT(0,0)/'0'` longtext DEFAULT NULL,
+  `POINT(0,0)/'0'` tinytext DEFAULT NULL,
-  `POINT(0,0) MOD '0'` longtext DEFAULT NULL
+  `POINT(0,0) MOD '0'` tinytext DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1;
 CREATE TABLE t1 AS SELECT
@@ -394,8 +394,8 @@ CREATE TABLE t1 AS SELECT
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `'0'+POINT(0,0)` longtext DEFAULT NULL,
+  `'0'+POINT(0,0)` tinytext DEFAULT NULL,
-  `'0'*POINT(0,0)` longtext DEFAULT NULL
+  `'0'*POINT(0,0)` tinytext DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1;
 CREATE TABLE t1 AS SELECT '0'-POINT(0,0) LIMIT 0;

mysql-test/r/gis.result

@@ -709,7 +709,7 @@ def	test	t1	t1	g	g	255	4294967295	0	Y	144	0	63
 g
 select asbinary(g) from t1;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def					asbinary(g)	252	4294967295	0	Y	128	0	63
+def					asbinary(g)	251	4294967295	0	Y	128	0	63
 asbinary(g)
 drop table t1;
 create table t1 (a TEXT, b GEOMETRY NOT NULL, SPATIAL KEY(b));
@@ -4030,65 +4030,65 @@ DROP TABLE t1;
 #
 CREATE TABLE t1 (a GEOMETRY);
 SELECT POINT(1,1) + 1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '+'
+ERROR HY000: Illegal parameter data types geometry and int for operation '+'
 SELECT POINT(1,1) - 1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '-'
+ERROR HY000: Illegal parameter data types geometry and int for operation '-'
 SELECT POINT(1,1) * 1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '*'
+ERROR HY000: Illegal parameter data types geometry and int for operation '*'
 SELECT POINT(1,1) / 1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '/'
+ERROR HY000: Illegal parameter data types geometry and int for operation '/'
 SELECT POINT(1,1) MOD 1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '%'
+ERROR HY000: Illegal parameter data types geometry and int for operation '%'
 SELECT 1 + POINT(1,1);
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '+'
+ERROR HY000: Illegal parameter data types int and geometry for operation '+'
 SELECT 1 - POINT(1,1);
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '-'
+ERROR HY000: Illegal parameter data types int and geometry for operation '-'
 SELECT 1 * POINT(1,1);
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '*'
+ERROR HY000: Illegal parameter data types int and geometry for operation '*'
 SELECT 1 / POINT(1,1);
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '/'
+ERROR HY000: Illegal parameter data types int and geometry for operation '/'
 SELECT 1 MOD POINT(1,1);
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '%'
+ERROR HY000: Illegal parameter data types int and geometry for operation '%'
 SELECT a + 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '+'
+ERROR HY000: Illegal parameter data types geometry and int for operation '+'
 SELECT a - 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '-'
+ERROR HY000: Illegal parameter data types geometry and int for operation '-'
 SELECT a * 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '*'
+ERROR HY000: Illegal parameter data types geometry and int for operation '*'
 SELECT a / 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '/'
+ERROR HY000: Illegal parameter data types geometry and int for operation '/'
 SELECT a MOD 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '%'
+ERROR HY000: Illegal parameter data types geometry and int for operation '%'
 SELECT 1 + a FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '+'
+ERROR HY000: Illegal parameter data types int and geometry for operation '+'
 SELECT 1 - a FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '-'
+ERROR HY000: Illegal parameter data types int and geometry for operation '-'
 SELECT 1 * a FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '*'
+ERROR HY000: Illegal parameter data types int and geometry for operation '*'
 SELECT 1 / a FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '/'
+ERROR HY000: Illegal parameter data types int and geometry for operation '/'
 SELECT 1 MOD a FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '%'
+ERROR HY000: Illegal parameter data types int and geometry for operation '%'
 SELECT COALESCE(a) + 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '+'
+ERROR HY000: Illegal parameter data types geometry and int for operation '+'
 SELECT COALESCE(a) - 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '-'
+ERROR HY000: Illegal parameter data types geometry and int for operation '-'
 SELECT COALESCE(a) * 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '*'
+ERROR HY000: Illegal parameter data types geometry and int for operation '*'
 SELECT COALESCE(a) / 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '/'
+ERROR HY000: Illegal parameter data types geometry and int for operation '/'
 SELECT COALESCE(a) MOD 1 FROM t1;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '%'
+ERROR HY000: Illegal parameter data types geometry and int for operation '%'
 SELECT 1 + COALESCE(a) FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '+'
+ERROR HY000: Illegal parameter data types int and geometry for operation '+'
 SELECT 1 - COALESCE(a) FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '-'
+ERROR HY000: Illegal parameter data types int and geometry for operation '-'
 SELECT 1 * COALESCE(a) FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '*'
+ERROR HY000: Illegal parameter data types int and geometry for operation '*'
 SELECT 1 / COALESCE(a) FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '/'
+ERROR HY000: Illegal parameter data types int and geometry for operation '/'
 SELECT 1 MOD COALESCE(a) FROM t1;
-ERROR HY000: Illegal parameter data types bigint and geometry for operation '%'
+ERROR HY000: Illegal parameter data types int and geometry for operation '%'
 DROP TABLE t1;
 #
 # MDEV-12514 Split Item_temporal_func::fix_length_and_dec()

mysql-test/r/metadata.result

@@ -76,12 +76,12 @@ def			aaa	@arg00	@arg00	8	20	1	Y	32768	0	63
 1
 select 1 union select 1;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def				1	1	8	20	1	N	32769	0	63
+def				1	1	3	11	1	N	32769	0	63
 1
 1
 select * from (select 1 union select 1) aaa;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def			aaa	1	1	8	20	1	N	32769	0	63
+def			aaa	1	1	3	11	1	N	32769	0	63
 1
 1
 drop table t1;

mysql-test/r/null.result

@@ -575,8 +575,14 @@ c_float      FLOAT,
 c_double     DOUBLE,
 c_decimal103 DECIMAL(10,3),
 c_varchar10  VARCHAR(10),
+c_tinytext   TINYTEXT,
 c_text       TEXT,
+c_mediumtext MEDIUMTEXT,
+c_longtext   LONGTEXT,
+c_tinyblob   TINYBLOB,
 c_blob       BLOB,
+c_mediumblob MEDIUMBLOB,
+c_longblob   LONGBLOB,
 c_enum       ENUM('one','two','tree'),
 c_datetime3  DATETIME(3),
 c_timestamp3 TIMESTAMP(3),
@@ -899,6 +905,45 @@ t2	CREATE TABLE `t2` (
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t2;
 CREATE TABLE t2 AS SELECT
+NULLIF(c_tinytext,  1),
+NULLIF(c_tinytext,  c_smallint),
+NULLIF(c_tinytext,  c_tinyint),
+NULLIF(c_tinytext,  c_int),
+NULLIF(c_tinytext,  c_bigint),
+NULLIF(c_tinytext,  c_float),
+NULLIF(c_tinytext,  c_double),
+NULLIF(c_tinytext,  c_decimal103),
+NULLIF(c_tinytext,  c_varchar10),
+NULLIF(c_tinytext,  c_text),
+NULLIF(c_tinytext,  c_blob),
+NULLIF(c_tinytext,  c_enum),
+NULLIF(c_tinytext,  c_datetime3),
+NULLIF(c_tinytext,  c_timestamp3),
+NULLIF(c_tinytext,  c_date),
+NULLIF(c_tinytext,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `NULLIF(c_tinytext,  1)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_smallint)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_tinyint)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_int)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_bigint)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_float)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_double)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_decimal103)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_varchar10)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_text)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_blob)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_enum)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_datetime3)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_timestamp3)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_date)` tinytext DEFAULT NULL,
+  `NULLIF(c_tinytext,  c_time)` tinytext DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT
 NULLIF(c_text,  1),
 NULLIF(c_text,  c_smallint),
 NULLIF(c_text,  c_tinyint),
@@ -919,22 +964,139 @@ FROM t1;
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
-  `NULLIF(c_text,  1)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  1)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_smallint)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_smallint)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_tinyint)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_tinyint)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_int)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_int)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_bigint)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_bigint)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_float)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_float)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_double)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_double)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_decimal103)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_decimal103)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_varchar10)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_varchar10)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_text)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_text)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_blob)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_blob)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_enum)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_enum)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_datetime3)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_datetime3)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_timestamp3)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_timestamp3)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_date)` longtext DEFAULT NULL,
+  `NULLIF(c_text,  c_date)` text DEFAULT NULL,
-  `NULLIF(c_text,  c_time)` longtext DEFAULT NULL
+  `NULLIF(c_text,  c_time)` text DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT
+NULLIF(c_mediumtext,  1),
+NULLIF(c_mediumtext,  c_smallint),
+NULLIF(c_mediumtext,  c_tinyint),
+NULLIF(c_mediumtext,  c_int),
+NULLIF(c_mediumtext,  c_bigint),
+NULLIF(c_mediumtext,  c_float),
+NULLIF(c_mediumtext,  c_double),
+NULLIF(c_mediumtext,  c_decimal103),
+NULLIF(c_mediumtext,  c_varchar10),
+NULLIF(c_mediumtext,  c_text),
+NULLIF(c_mediumtext,  c_blob),
+NULLIF(c_mediumtext,  c_enum),
+NULLIF(c_mediumtext,  c_datetime3),
+NULLIF(c_mediumtext,  c_timestamp3),
+NULLIF(c_mediumtext,  c_date),
+NULLIF(c_mediumtext,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `NULLIF(c_mediumtext,  1)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_smallint)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_tinyint)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_int)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_bigint)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_float)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_double)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_decimal103)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_varchar10)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_text)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_blob)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_enum)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_datetime3)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_timestamp3)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_date)` mediumtext DEFAULT NULL,
+  `NULLIF(c_mediumtext,  c_time)` mediumtext DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT
+NULLIF(c_longtext,  1),
+NULLIF(c_longtext,  c_smallint),
+NULLIF(c_longtext,  c_tinyint),
+NULLIF(c_longtext,  c_int),
+NULLIF(c_longtext,  c_bigint),
+NULLIF(c_longtext,  c_float),
+NULLIF(c_longtext,  c_double),
+NULLIF(c_longtext,  c_decimal103),
+NULLIF(c_longtext,  c_varchar10),
+NULLIF(c_longtext,  c_text),
+NULLIF(c_longtext,  c_blob),
+NULLIF(c_longtext,  c_enum),
+NULLIF(c_longtext,  c_datetime3),
+NULLIF(c_longtext,  c_timestamp3),
+NULLIF(c_longtext,  c_date),
+NULLIF(c_longtext,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `NULLIF(c_longtext,  1)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_smallint)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_tinyint)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_int)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_bigint)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_float)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_double)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_decimal103)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_varchar10)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_text)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_blob)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_enum)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_datetime3)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_timestamp3)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_date)` longtext DEFAULT NULL,
+  `NULLIF(c_longtext,  c_time)` longtext DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT
+NULLIF(c_tinyblob,  1),
+NULLIF(c_tinyblob,  c_smallint),
+NULLIF(c_tinyblob,  c_tinyint),
+NULLIF(c_tinyblob,  c_int),
+NULLIF(c_tinyblob,  c_bigint),
+NULLIF(c_tinyblob,  c_float),
+NULLIF(c_tinyblob,  c_double),
+NULLIF(c_tinyblob,  c_decimal103),
+NULLIF(c_tinyblob,  c_varchar10),
+NULLIF(c_tinyblob,  c_text),
+NULLIF(c_tinyblob,  c_blob),
+NULLIF(c_tinyblob,  c_enum),
+NULLIF(c_tinyblob,  c_datetime3),
+NULLIF(c_tinyblob,  c_timestamp3),
+NULLIF(c_tinyblob,  c_date),
+NULLIF(c_tinyblob,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `NULLIF(c_tinyblob,  1)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_smallint)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_tinyint)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_int)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_bigint)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_float)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_double)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_decimal103)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_varchar10)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_text)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_blob)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_enum)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_datetime3)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_timestamp3)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_date)` tinyblob DEFAULT NULL,
+  `NULLIF(c_tinyblob,  c_time)` tinyblob DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t2;
 CREATE TABLE t2 AS SELECT
@@ -958,22 +1120,100 @@ FROM t1;
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
-  `NULLIF(c_blob,  1)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  1)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_smallint)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_smallint)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_tinyint)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_tinyint)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_int)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_int)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_bigint)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_bigint)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_float)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_float)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_double)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_double)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_decimal103)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_decimal103)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_varchar10)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_varchar10)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_text)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_text)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_blob)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_blob)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_enum)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_enum)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_datetime3)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_datetime3)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_timestamp3)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_timestamp3)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_date)` longblob DEFAULT NULL,
+  `NULLIF(c_blob,  c_date)` blob DEFAULT NULL,
-  `NULLIF(c_blob,  c_time)` longblob DEFAULT NULL
+  `NULLIF(c_blob,  c_time)` blob DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT
+NULLIF(c_mediumblob,  1),
+NULLIF(c_mediumblob,  c_smallint),
+NULLIF(c_mediumblob,  c_tinyint),
+NULLIF(c_mediumblob,  c_int),
+NULLIF(c_mediumblob,  c_bigint),
+NULLIF(c_mediumblob,  c_float),
+NULLIF(c_mediumblob,  c_double),
+NULLIF(c_mediumblob,  c_decimal103),
+NULLIF(c_mediumblob,  c_varchar10),
+NULLIF(c_mediumblob,  c_text),
+NULLIF(c_mediumblob,  c_blob),
+NULLIF(c_mediumblob,  c_enum),
+NULLIF(c_mediumblob,  c_datetime3),
+NULLIF(c_mediumblob,  c_timestamp3),
+NULLIF(c_mediumblob,  c_date),
+NULLIF(c_mediumblob,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `NULLIF(c_mediumblob,  1)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_smallint)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_tinyint)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_int)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_bigint)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_float)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_double)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_decimal103)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_varchar10)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_text)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_blob)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_enum)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_datetime3)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_timestamp3)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_date)` mediumblob DEFAULT NULL,
+  `NULLIF(c_mediumblob,  c_time)` mediumblob DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT
+NULLIF(c_longblob,  1),
+NULLIF(c_longblob,  c_smallint),
+NULLIF(c_longblob,  c_tinyint),
+NULLIF(c_longblob,  c_int),
+NULLIF(c_longblob,  c_bigint),
+NULLIF(c_longblob,  c_float),
+NULLIF(c_longblob,  c_double),
+NULLIF(c_longblob,  c_decimal103),
+NULLIF(c_longblob,  c_varchar10),
+NULLIF(c_longblob,  c_text),
+NULLIF(c_longblob,  c_blob),
+NULLIF(c_longblob,  c_enum),
+NULLIF(c_longblob,  c_datetime3),
+NULLIF(c_longblob,  c_timestamp3),
+NULLIF(c_longblob,  c_date),
+NULLIF(c_longblob,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `NULLIF(c_longblob,  1)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_smallint)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_tinyint)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_int)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_bigint)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_float)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_double)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_decimal103)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_varchar10)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_text)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_blob)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_enum)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_datetime3)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_timestamp3)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_date)` longblob DEFAULT NULL,
+  `NULLIF(c_longblob,  c_time)` longblob DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t2;
 CREATE TABLE t2 AS SELECT

mysql-test/r/sp-row.result

@@ -2052,8 +2052,8 @@ CALL p1();
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `var` varchar(255) DEFAULT NULL,
+  `var` tinytext DEFAULT NULL,
-  `rec.var` varchar(255) DEFAULT NULL
+  `rec.var` tinytext DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1;
 DROP PROCEDURE p1;
@@ -2092,8 +2092,8 @@ CALL p1();
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `var` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
+  `var` text CHARACTER SET utf8 DEFAULT NULL,
-  `rec.var` varchar(255) CHARACTER SET utf8 DEFAULT NULL
+  `rec.var` text CHARACTER SET utf8 DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1;
 DROP PROCEDURE p1;

mysql-test/r/type_decimal.result

@@ -1019,3 +1019,52 @@ cast('-0.0' as decimal(5,1)) < 0
 #
 # End of 5.5 tests
 #
+#
+# Start of 10.3 tests
+#
+#
+# MDEV-9217 Split Item::tmp_table_field_from_field_type() into virtual methods in Type_handler
+#
+# This creates the old DECIMAL. Will be fixed in MDEV-12574.
+CREATE TABLE t1 AS SELECT MAX(a) FROM t1dec102;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `MAX(a)` decimal(10,2)/*old*/ DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE TABLE t1 AS SELECT COALESCE(a) FROM t1dec102;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `COALESCE(a)` decimal(10,2) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE TABLE t1 (a BIGINT);
+CREATE TABLE t2 AS SELECT a FROM t1dec102 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` decimal(21,2) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
+CREATE TABLE t1 (a MEDIUMINT);
+CREATE TABLE t2 AS SELECT a FROM t1dec102 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` decimal(10,2) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
+CREATE TABLE t1 (a YEAR);
+CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT a FROM t1dec102;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` decimal(10,2) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
+DROP TABLE t1dec102;

mysql-test/r/type_enum.result

@@ -1803,13 +1803,18 @@ id	c1 + 0	c1
 3	2	
 4	0	
 DROP TABLE t1;
-End of 4.1 tests
+End of 4.1 tests
+SET sql_mode='';
 create table t1(f1 enum('a','b'), index(f1));
+insert into t1 values(''),(''),('a'),('b');
+Warnings:
+Warning	1265	Data truncated for column 'f1' at row 1
 Warning	1265	Data truncated for column 'f1' at row 2
 select * from t1 where f1='';
 f1
 
 
+drop table t1;
 SET sql_mode=DEFAULT;
 CREATE TABLE t1 (c1 ENUM('a', '', 'b'));
 INSERT INTO t1 (c1) VALUES ('b');
@@ -2219,3 +2224,90 @@ SELECT * FROM t1;
 SELECT * FROM t1;
 a
 
+DROP TABLE t1;
+#
+# Start of 10.3 tests
+#
+#
+# MDEV-12432 Range optimizer for ENUM and SET does not return "Impossible WHERE" in some case
+#
+CREATE TABLE t1 (a ENUM('a','b','c','1'),KEY(a));
+INSERT INTO t1 VALUES ('a'),('b'),('c'),('1');
+EXPLAIN SELECT * FROM t1 WHERE a='xx';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='99999999';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a=100.1e0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a=100;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a=100.1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='100';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='1x';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='1.0';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='1.1';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+DROP TABLE t1;
+#
+# MDEV-12656 Crash in CREATE..SELECT..UNION with a ENUM column and NULL
+#
+CREATE TABLE t1 (a ENUM('a'));
+# non-UNION + table column
+CREATE TABLE t2 AS SELECT (SELECT a FROM t1);
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `(SELECT a FROM t1)` varchar(1) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+# UNION + table column
+CREATE TABLE t2 AS SELECT (SELECT a FROM t1 UNION SELECT NULL);
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `(SELECT a FROM t1 UNION SELECT NULL)` varchar(1) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+# UNION + SP variable
+CREATE PROCEDURE p1()
+BEGIN
+DECLARE va ENUM('a');
+CREATE TABLE t2 AS SELECT (SELECT va FROM t1 UNION SELECT NULL);
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+END;
+$$
+CALL p1();
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `(SELECT va FROM t1 UNION SELECT NULL)` varchar(1) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP PROCEDURE p1;
+# UNION + anchored SP variable
+CREATE PROCEDURE p1()
+BEGIN
+DECLARE va TYPE OF t1.a;
+CREATE TABLE t2 AS SELECT (SELECT va FROM t1 UNION SELECT NULL);
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+END;
+$$
+CALL p1();
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `(SELECT va FROM t1 UNION SELECT NULL)` varchar(1) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP PROCEDURE p1;

mysql-test/r/type_set.result

@@ -316,3 +316,39 @@ DROP TABLE t1;
 #
 # End of 10.1 tests
 #
+#
+# Start of 10.3 tests
+#
+#
+# MDEV-12432 Range optimizer for ENUM and SET does not return "Impossible WHERE" in some case
+#
+CREATE TABLE t1 (a SET('a','b','c','1'),KEY(a));
+INSERT INTO t1 VALUES ('a'),('b'),('c'),('1');
+EXPLAIN SELECT * FROM t1 WHERE a='xx';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='99999999';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a=100.1e0;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a=100;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a=100.1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='100';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='1x';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='1.0';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+EXPLAIN SELECT * FROM t1 WHERE a='1.1';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+DROP TABLE t1;

mysql-test/r/type_timestamp.result

@@ -992,5 +992,25 @@ a	b
 DROP TABLE t1;
 SET @@timestamp=DEFAULT;
 #
+# MDEV-12582 Wrong data type for CREATE..SELECT MAX(COALESCE(timestamp_column))
+#
+CREATE TABLE t1 (a TIMESTAMP);
+CREATE TABLE t2 AS SELECT
+MAX(a),
+COALESCE(a),
+COALESCE(MAX(a)),
+MAX(COALESCE(a))
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `MAX(a)` timestamp NULL DEFAULT NULL,
+  `COALESCE(a)` timestamp NULL DEFAULT NULL,
+  `COALESCE(MAX(a))` timestamp NULL DEFAULT NULL,
+  `MAX(COALESCE(a))` timestamp NULL DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
+#
 # End of 10.3 tests
 #

mysql-test/r/union.result

@@ -852,7 +852,7 @@ select * from t1;
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `1` bigint(20) NOT NULL DEFAULT 0
+  `1` int(11) NOT NULL DEFAULT 0
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 create table t1 select _latin1"test" union select _latin2"testt" ;
@@ -1449,6 +1449,28 @@ t2	CREATE TABLE `t2` (
   `f8` mediumtext CHARACTER SET utf8 DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1, t2;
+CREATE TABLE t1
+(
+c_varchar varchar(1) character set utf8 collate utf8_general_ci,
+c_tinytext tinytext,
+c_text text,
+c_mediumtext mediumtext,
+c_longtext longtext
+);
+CREATE TABLE t2 AS
+SELECT c_tinytext, c_text, c_mediumtext, c_longtext FROM t1
+UNION
+SELECT c_varchar, c_varchar, c_varchar, c_varchar FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `c_tinytext` text CHARACTER SET utf8 DEFAULT NULL,
+  `c_text` mediumtext CHARACTER SET utf8 DEFAULT NULL,
+  `c_mediumtext` longtext CHARACTER SET utf8 DEFAULT NULL,
+  `c_longtext` longtext CHARACTER SET utf8 DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t2;
+DROP TABLE t1;
 (select avg(1)) union (select avg(1)) union (select avg(1)) union
 (select avg(1)) union (select avg(1)) union (select avg(1)) union
 (select avg(1)) union (select avg(1)) union (select avg(1)) union
@@ -2156,3 +2178,33 @@ WHERE t1_2.b NOT IN ( SELECT 4 UNION ALL SELECT 5 );
 a	b	a	b
 1	1	1	1
 DROP TABLE t1;
+#
+# Start of 10.3 tests
+#
+#
+# MDEV-12619 UNION creates excessive integer column types for integer literals
+#
+CREATE TABLE t1 AS SELECT 1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `1` int(1) NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE OR REPLACE TABLE t1 AS SELECT 1 UNION SELECT 1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `1` int(11) NOT NULL DEFAULT 0
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE OR REPLACE TABLE t1 AS SELECT * FROM (SELECT 1 UNION SELECT 1) AS t0;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `1` int(11) NOT NULL DEFAULT 0
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1;
+#
+# End of 10.3 tests
+#

mysql-test/suite/compat/oracle/r/sp-row.result

@@ -2129,8 +2129,8 @@ CALL p1();
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE "t1" (
-  "var" varchar(255) DEFAULT NULL,
+  "var" tinytext DEFAULT NULL,
-  "rec.var" varchar(255) DEFAULT NULL
+  "rec.var" tinytext DEFAULT NULL
 )
 DROP TABLE t1;
 DROP PROCEDURE p1;
@@ -2169,8 +2169,8 @@ CALL p1();
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE "t1" (
-  "var" varchar(255) CHARACTER SET utf8 DEFAULT NULL,
+  "var" text CHARACTER SET utf8 DEFAULT NULL,
-  "rec.var" varchar(255) CHARACTER SET utf8 DEFAULT NULL
+  "rec.var" text CHARACTER SET utf8 DEFAULT NULL
 )
 DROP TABLE t1;
 DROP PROCEDURE p1;

mysql-test/suite/innodb_gis/r/1.result

@@ -681,7 +681,7 @@ def	test	t1	t1	g	g	255	4294967295	0	Y	144	0	63
 g
 select ST_asbinary(g) from t1;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def					ST_asbinary(g)	252	4294967295	0	Y	128	0	63
+def					ST_asbinary(g)	251	4294967295	0	Y	128	0	63
 ST_asbinary(g)
 drop table t1;
 create table t1 (a TEXT, b GEOMETRY NOT NULL, INDEX(b(5)));

mysql-test/suite/innodb_gis/r/create_spatial_index.result

@@ -1238,7 +1238,7 @@ Table	Op	Msg_type	Msg_text
 test.tab	check	status	OK
 DROP TABLE tab;
 CREATE TABLE tab(c1 POINT NOT NULL,CONSTRAINT tab_const check(c1 > 0) ) ENGINE=InnoDB;
-ERROR HY000: Illegal parameter data types geometry and bigint for operation '>'
+ERROR HY000: Illegal parameter data types geometry and int for operation '>'
 CREATE TABLE tab(c1 POINT NOT NULL,CONSTRAINT tab_const check(CAST(c1 AS BINARY) > 0) ) ENGINE=InnoDB;
 CREATE SPATIAL INDEX idx1 ON tab(c1) ;
 SHOW CREATE TABLE tab;

mysql-test/suite/innodb_gis/r/gis.result

@@ -681,7 +681,7 @@ def	test	t1	t1	g	g	255	4294967295	0	Y	144	0	63
 g
 select ST_asbinary(g) from t1;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def					ST_asbinary(g)	252	4294967295	0	Y	128	0	63
+def					ST_asbinary(g)	251	4294967295	0	Y	128	0	63
 ST_asbinary(g)
 drop table t1;
 create table t1 (a TEXT, b GEOMETRY NOT NULL, SPATIAL KEY(b));

mysql-test/t/create.test

@@ -402,6 +402,22 @@ explain t2;
 select * from t2;
 drop table t1, t2;
 
+CREATE TABLE t1 (
+  c_tinytext tinytext,
+  c_text text,
+  c_mediumtext mediumtext,
+  c_longtext longtext
+);
+CREATE TABLE t2 AS SELECT
+  ifnull(c_tinytext,   CAST('yet another binary data' AS BINARY)),
+  ifnull(c_text,       CAST('yet another binary data' AS BINARY)),
+  ifnull(c_mediumtext, CAST('yet another binary data' AS BINARY)),
+  ifnull(c_longtext,   CAST('yet another binary data' AS BINARY))
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
 create table t1 (a tinyint, b smallint, c mediumint, d int, e bigint, f float(3,2), g double(4,3), h decimal(5,4), i year, j date, k timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, l datetime, m enum('a','b'), n set('a','b'), o char(10));
 create table t2 select ifnull(a,a), ifnull(b,b), ifnull(c,c), ifnull(d,d), ifnull(e,e), ifnull(f,f), ifnull(g,g), ifnull(h,h), ifnull(i,i), ifnull(j,j), ifnull(k,k), ifnull(l,l), ifnull(m,m), ifnull(n,n), ifnull(o,o) from t1;
 show create table t2;

mysql-test/t/ctype_utf8.test

@@ -2109,6 +2109,18 @@ SET NAMES utf8;
 --error ER_ILLEGAL_VALUE_FOR_TYPE
 CREATE TABLE t1 (a SET('a,bü'));
 
+--echo #
+--echo # MDEV-12607 Hybrid functions create wrong VARBINARY length when mixing character and binary data
+--echo #
+SET sql_mode='';
+SET NAMES utf8;
+CREATE OR REPLACE TABLE t1 AS SELECT COALESCE('ßa',_binary 'a');
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+SET sql_mode=DEFAULT;
+
+
 --echo #
 --echo # End of 10.3 tests
 --echo #

mysql-test/t/func_hybrid_type.test

@@ -500,6 +500,16 @@ SHOW CREATE TABLE t2;
 DROP TABLE t2;
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-12601 Hybrid functions create a column of an impossible type DOUBLE(256,4)
+--echo #
+
+CREATE TABLE t1 (a DOUBLE(255,4),b DOUBLE(255,3));
+CREATE TABLE t2 AS SELECT COALESCE(a,b) FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
 
 --echo #
 --echo # End of 10.3 tests

mysql-test/t/func_str.test

@@ -1806,3 +1806,23 @@ DROP TABLE t1;
 --echo #
 --echo # End of 10.1 tests
 --echo #
+
+
+--echo #
+--echo # Start of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-12592 Illegal mix of collations with the HEX function
+--echo #
+
+SET NAMES utf8;
+CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
+INSERT INTO t1 VALUES (0x09),('a');
+SELECT IF(a<' ',HEX(a),a) FROM t1 ORDER BY a;
+DROP TABLE  t1;
+
+
+--echo #
+--echo # End of 10.3 tests
+--echo #

mysql-test/t/null.test

@@ -414,8 +414,14 @@ CREATE TABLE t1
   c_double     DOUBLE,
   c_decimal103 DECIMAL(10,3),
   c_varchar10  VARCHAR(10),
+  c_tinytext   TINYTEXT,
   c_text       TEXT,
+  c_mediumtext MEDIUMTEXT,
+  c_longtext   LONGTEXT,
+  c_tinyblob   TINYBLOB,
   c_blob       BLOB,
+  c_mediumblob MEDIUMBLOB,
+  c_longblob   LONGBLOB,
   c_enum       ENUM('one','two','tree'),
   c_datetime3  DATETIME(3),
   c_timestamp3 TIMESTAMP(3),
@@ -596,6 +602,27 @@ FROM t1;
 SHOW CREATE TABLE t2;
 DROP TABLE t2;
 
+CREATE TABLE t2 AS SELECT
+  NULLIF(c_tinytext,  1),
+  NULLIF(c_tinytext,  c_smallint),
+  NULLIF(c_tinytext,  c_tinyint),
+  NULLIF(c_tinytext,  c_int),
+  NULLIF(c_tinytext,  c_bigint),
+  NULLIF(c_tinytext,  c_float),
+  NULLIF(c_tinytext,  c_double),
+  NULLIF(c_tinytext,  c_decimal103),
+  NULLIF(c_tinytext,  c_varchar10),
+  NULLIF(c_tinytext,  c_text),
+  NULLIF(c_tinytext,  c_blob),
+  NULLIF(c_tinytext,  c_enum),
+  NULLIF(c_tinytext,  c_datetime3),
+  NULLIF(c_tinytext,  c_timestamp3),
+  NULLIF(c_tinytext,  c_date),
+  NULLIF(c_tinytext,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
 CREATE TABLE t2 AS SELECT
   NULLIF(c_text,  1),
   NULLIF(c_text,  c_smallint),
@@ -617,7 +644,70 @@ FROM t1;
 SHOW CREATE TABLE t2;
 DROP TABLE t2;
 
-# QQ: this should probably create BLOB instead of LONGBLOB
+CREATE TABLE t2 AS SELECT
+  NULLIF(c_mediumtext,  1),
+  NULLIF(c_mediumtext,  c_smallint),
+  NULLIF(c_mediumtext,  c_tinyint),
+  NULLIF(c_mediumtext,  c_int),
+  NULLIF(c_mediumtext,  c_bigint),
+  NULLIF(c_mediumtext,  c_float),
+  NULLIF(c_mediumtext,  c_double),
+  NULLIF(c_mediumtext,  c_decimal103),
+  NULLIF(c_mediumtext,  c_varchar10),
+  NULLIF(c_mediumtext,  c_text),
+  NULLIF(c_mediumtext,  c_blob),
+  NULLIF(c_mediumtext,  c_enum),
+  NULLIF(c_mediumtext,  c_datetime3),
+  NULLIF(c_mediumtext,  c_timestamp3),
+  NULLIF(c_mediumtext,  c_date),
+  NULLIF(c_mediumtext,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE TABLE t2 AS SELECT
+  NULLIF(c_longtext,  1),
+  NULLIF(c_longtext,  c_smallint),
+  NULLIF(c_longtext,  c_tinyint),
+  NULLIF(c_longtext,  c_int),
+  NULLIF(c_longtext,  c_bigint),
+  NULLIF(c_longtext,  c_float),
+  NULLIF(c_longtext,  c_double),
+  NULLIF(c_longtext,  c_decimal103),
+  NULLIF(c_longtext,  c_varchar10),
+  NULLIF(c_longtext,  c_text),
+  NULLIF(c_longtext,  c_blob),
+  NULLIF(c_longtext,  c_enum),
+  NULLIF(c_longtext,  c_datetime3),
+  NULLIF(c_longtext,  c_timestamp3),
+  NULLIF(c_longtext,  c_date),
+  NULLIF(c_longtext,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+
+CREATE TABLE t2 AS SELECT
+  NULLIF(c_tinyblob,  1),
+  NULLIF(c_tinyblob,  c_smallint),
+  NULLIF(c_tinyblob,  c_tinyint),
+  NULLIF(c_tinyblob,  c_int),
+  NULLIF(c_tinyblob,  c_bigint),
+  NULLIF(c_tinyblob,  c_float),
+  NULLIF(c_tinyblob,  c_double),
+  NULLIF(c_tinyblob,  c_decimal103),
+  NULLIF(c_tinyblob,  c_varchar10),
+  NULLIF(c_tinyblob,  c_text),
+  NULLIF(c_tinyblob,  c_blob),
+  NULLIF(c_tinyblob,  c_enum),
+  NULLIF(c_tinyblob,  c_datetime3),
+  NULLIF(c_tinyblob,  c_timestamp3),
+  NULLIF(c_tinyblob,  c_date),
+  NULLIF(c_tinyblob,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
 CREATE TABLE t2 AS SELECT
   NULLIF(c_blob,  1),
   NULLIF(c_blob,  c_smallint),
@@ -639,6 +729,49 @@ FROM t1;
 SHOW CREATE TABLE t2;
 DROP TABLE t2;
 
+CREATE TABLE t2 AS SELECT
+  NULLIF(c_mediumblob,  1),
+  NULLIF(c_mediumblob,  c_smallint),
+  NULLIF(c_mediumblob,  c_tinyint),
+  NULLIF(c_mediumblob,  c_int),
+  NULLIF(c_mediumblob,  c_bigint),
+  NULLIF(c_mediumblob,  c_float),
+  NULLIF(c_mediumblob,  c_double),
+  NULLIF(c_mediumblob,  c_decimal103),
+  NULLIF(c_mediumblob,  c_varchar10),
+  NULLIF(c_mediumblob,  c_text),
+  NULLIF(c_mediumblob,  c_blob),
+  NULLIF(c_mediumblob,  c_enum),
+  NULLIF(c_mediumblob,  c_datetime3),
+  NULLIF(c_mediumblob,  c_timestamp3),
+  NULLIF(c_mediumblob,  c_date),
+  NULLIF(c_mediumblob,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE TABLE t2 AS SELECT
+  NULLIF(c_longblob,  1),
+  NULLIF(c_longblob,  c_smallint),
+  NULLIF(c_longblob,  c_tinyint),
+  NULLIF(c_longblob,  c_int),
+  NULLIF(c_longblob,  c_bigint),
+  NULLIF(c_longblob,  c_float),
+  NULLIF(c_longblob,  c_double),
+  NULLIF(c_longblob,  c_decimal103),
+  NULLIF(c_longblob,  c_varchar10),
+  NULLIF(c_longblob,  c_text),
+  NULLIF(c_longblob,  c_blob),
+  NULLIF(c_longblob,  c_enum),
+  NULLIF(c_longblob,  c_datetime3),
+  NULLIF(c_longblob,  c_timestamp3),
+  NULLIF(c_longblob,  c_date),
+  NULLIF(c_longblob,  c_time)
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+
 # QQ: this should probably create a ENUM column instead of VARCHAR(4)
 CREATE TABLE t2 AS SELECT
   NULLIF(c_enum,  1),

mysql-test/t/type_decimal.test

@@ -612,3 +612,46 @@ select cast('-0.0' as decimal(5,1)) < 0;
 --echo #
 --echo # End of 5.5 tests
 --echo #
+
+--echo #
+--echo # Start of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-9217 Split Item::tmp_table_field_from_field_type() into virtual methods in Type_handler
+--echo #
+
+let $MYSQLD_DATADIR= `select @@datadir`;
+
+--copy_file std_data/old_decimal/t1dec102.frm $MYSQLD_DATADIR/test/t1dec102.frm
+--copy_file std_data/old_decimal/t1dec102.MYD $MYSQLD_DATADIR/test/t1dec102.MYD
+--copy_file std_data/old_decimal/t1dec102.MYI $MYSQLD_DATADIR/test/t1dec102.MYI
+
+--echo # This creates the old DECIMAL. Will be fixed in MDEV-12574.
+CREATE TABLE t1 AS SELECT MAX(a) FROM t1dec102;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 AS SELECT COALESCE(a) FROM t1dec102;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a BIGINT);
+CREATE TABLE t2 AS SELECT a FROM t1dec102 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a MEDIUMINT);
+CREATE TABLE t2 AS SELECT a FROM t1dec102 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a YEAR);
+CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT a FROM t1dec102;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+DROP TABLE t1dec102;

mysql-test/t/type_enum.test

@@ -179,10 +179,12 @@ DROP TABLE t1;
 
 #
 # Bug#28729: Field_enum wrongly reported an error while storing an empty string.
-#
+#
+SET sql_mode='';
 create table t1(f1 enum('a','b'), index(f1));
 insert into t1 values(''),(''),('a'),('b');
 select * from t1 where f1='';
+drop table t1;
 SET sql_mode=DEFAULT;
 
 #
@@ -454,3 +456,65 @@ SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
 SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
 ALTER TABLE t1 MODIFY a ENUM('2001','2002');
 SELECT * FROM t1;
+DROP TABLE t1;
+
+--echo #
+--echo # Start of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-12432 Range optimizer for ENUM and SET does not return "Impossible WHERE" in some case
+--echo #
+
+CREATE TABLE t1 (a ENUM('a','b','c','1'),KEY(a));
+INSERT INTO t1 VALUES ('a'),('b'),('c'),('1');
+EXPLAIN SELECT * FROM t1 WHERE a='xx';
+EXPLAIN SELECT * FROM t1 WHERE a='99999999';
+EXPLAIN SELECT * FROM t1 WHERE a=100.1e0;
+EXPLAIN SELECT * FROM t1 WHERE a=100;
+EXPLAIN SELECT * FROM t1 WHERE a=100.1;
+EXPLAIN SELECT * FROM t1 WHERE a='100';
+EXPLAIN SELECT * FROM t1 WHERE a='1x';
+EXPLAIN SELECT * FROM t1 WHERE a='1.0';
+EXPLAIN SELECT * FROM t1 WHERE a='1.1';
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-12656 Crash in CREATE..SELECT..UNION with a ENUM column and NULL
+--echo #
+
+CREATE TABLE t1 (a ENUM('a'));
+--echo # non-UNION + table column
+CREATE TABLE t2 AS SELECT (SELECT a FROM t1);
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+--echo # UNION + table column
+CREATE TABLE t2 AS SELECT (SELECT a FROM t1 UNION SELECT NULL);
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+--echo # UNION + SP variable
+DELIMITER $$;
+CREATE PROCEDURE p1()
+BEGIN
+  DECLARE va ENUM('a');
+  CREATE TABLE t2 AS SELECT (SELECT va FROM t1 UNION SELECT NULL);
+  SHOW CREATE TABLE t2;
+  DROP TABLE t2;
+END;
+$$
+DELIMITER ;$$
+CALL p1();
+DROP PROCEDURE p1;
+--echo # UNION + anchored SP variable
+DELIMITER $$;
+CREATE PROCEDURE p1()
+BEGIN
+  DECLARE va TYPE OF t1.a;
+  CREATE TABLE t2 AS SELECT (SELECT va FROM t1 UNION SELECT NULL);
+  SHOW CREATE TABLE t2;
+  DROP TABLE t2;
+END;
+$$
+DELIMITER ;$$
+CALL p1();
+DROP PROCEDURE p1;

mysql-test/t/type_set.test

@@ -218,3 +218,25 @@ DROP TABLE t1;
 --echo #
 --echo # End of 10.1 tests
 --echo #
+
+
+--echo #
+--echo # Start of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-12432 Range optimizer for ENUM and SET does not return "Impossible WHERE" in some case
+--echo #
+
+CREATE TABLE t1 (a SET('a','b','c','1'),KEY(a));
+INSERT INTO t1 VALUES ('a'),('b'),('c'),('1');
+EXPLAIN SELECT * FROM t1 WHERE a='xx';
+EXPLAIN SELECT * FROM t1 WHERE a='99999999';
+EXPLAIN SELECT * FROM t1 WHERE a=100.1e0;
+EXPLAIN SELECT * FROM t1 WHERE a=100;
+EXPLAIN SELECT * FROM t1 WHERE a=100.1;
+EXPLAIN SELECT * FROM t1 WHERE a='100';
+EXPLAIN SELECT * FROM t1 WHERE a='1x';
+EXPLAIN SELECT * FROM t1 WHERE a='1.0';
+EXPLAIN SELECT * FROM t1 WHERE a='1.1';
+DROP TABLE t1;

mysql-test/t/type_timestamp.test

@@ -587,6 +587,22 @@ SELECT * FROM t1 WHERE TIME'10:20:30' BETWEEN a and b;
 DROP TABLE t1;
 SET @@timestamp=DEFAULT;
 
+--echo #
+--echo # MDEV-12582 Wrong data type for CREATE..SELECT MAX(COALESCE(timestamp_column))
+--echo #
+
+CREATE TABLE t1 (a TIMESTAMP);
+CREATE TABLE t2 AS SELECT
+  MAX(a),
+  COALESCE(a),
+  COALESCE(MAX(a)),
+  MAX(COALESCE(a))
+FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+
 --echo #
 --echo # End of 10.3 tests
 --echo #

mysql-test/t/union.test

@@ -889,6 +889,22 @@ create table t2 as select *, f6 as f8 from t1 union select *, f7 from t1;
 show create table t2;
 drop table t1, t2;
 
+CREATE TABLE t1
+(
+  c_varchar varchar(1) character set utf8 collate utf8_general_ci,
+  c_tinytext tinytext,
+  c_text text,
+  c_mediumtext mediumtext,
+  c_longtext longtext
+);
+CREATE TABLE t2 AS
+SELECT c_tinytext, c_text, c_mediumtext, c_longtext FROM t1
+UNION
+SELECT c_varchar, c_varchar, c_varchar, c_varchar FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
 #
 # Bug#18175: Union select over 129 tables with a sum function fails.
 #
@@ -1507,3 +1523,27 @@ SELECT * FROM t1 t1_1 LEFT JOIN t1 t1_2 ON ( t1_2.b = t1_1.a )
   WHERE t1_2.b NOT IN ( SELECT 4 UNION ALL SELECT 5 );
 
 DROP TABLE t1;
+
+--echo #
+--echo # Start of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-12619 UNION creates excessive integer column types for integer literals
+--echo #
+
+CREATE TABLE t1 AS SELECT 1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE OR REPLACE TABLE t1 AS SELECT 1 UNION SELECT 1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE OR REPLACE TABLE t1 AS SELECT * FROM (SELECT 1 UNION SELECT 1) AS t0;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+--echo #
+--echo # End of 10.3 tests
+--echo #

sql/field.cc

@@ -125,7 +125,7 @@ static enum_field_types field_types_merge_rules [FIELDTYPE_NUM][FIELDTYPE_NUM]=
   //MYSQL_TYPE_NULL         MYSQL_TYPE_TIMESTAMP
     MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_VARCHAR,
   //MYSQL_TYPE_LONGLONG     MYSQL_TYPE_INT24
-    MYSQL_TYPE_DECIMAL,     MYSQL_TYPE_DECIMAL,
+    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_NEWDECIMAL,
   //MYSQL_TYPE_DATE         MYSQL_TYPE_TIME
     MYSQL_TYPE_VARCHAR,     MYSQL_TYPE_VARCHAR,
   //MYSQL_TYPE_DATETIME     MYSQL_TYPE_YEAR
@@ -520,7 +520,7 @@ static enum_field_types field_types_merge_rules [FIELDTYPE_NUM][FIELDTYPE_NUM]=
   /* MYSQL_TYPE_YEAR -> */
   {
   //MYSQL_TYPE_DECIMAL      MYSQL_TYPE_TINY
-    MYSQL_TYPE_DECIMAL,     MYSQL_TYPE_TINY,
+    MYSQL_TYPE_NEWDECIMAL,  MYSQL_TYPE_TINY,
   //MYSQL_TYPE_SHORT        MYSQL_TYPE_LONG
     MYSQL_TYPE_SHORT,       MYSQL_TYPE_LONG,
   //MYSQL_TYPE_FLOAT        MYSQL_TYPE_DOUBLE
@@ -1256,14 +1256,14 @@ bool Field::can_optimize_group_min_max(const Item_bool_func *cond,
 
 
 /*
-  This covers all numeric types, ENUM, SET, BIT
+  This covers all numeric types, BIT
 */
 bool Field::can_optimize_range(const Item_bool_func *cond,
                                const Item *item,
                                bool is_eq_func) const
 {
   DBUG_ASSERT(cmp_type() != TIME_RESULT);   // Handled in Field_temporal
-  DBUG_ASSERT(cmp_type() != STRING_RESULT); // Handled in Field_longstr
+  DBUG_ASSERT(cmp_type() != STRING_RESULT); // Handled in Field_str descendants
   return item->cmp_type() != TIME_RESULT;
 }
 
@@ -2003,15 +2003,15 @@ bool Field_num::get_date(MYSQL_TIME *ltime,ulonglong fuzzydate)
 Field_str::Field_str(uchar *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
                      uchar null_bit_arg, utype unireg_check_arg,
                      const LEX_CSTRING *field_name_arg,
-                     CHARSET_INFO *charset_arg)
+                     const DTCollation &collation)
   :Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
          unireg_check_arg, field_name_arg)
 {
-  field_charset= charset_arg;
+  field_charset= collation.collation;
-  if (charset_arg->state & MY_CS_BINSORT)
+  if (collation.collation->state & MY_CS_BINSORT)
     flags|=BINARY_FLAG;
-  field_derivation= DERIVATION_IMPLICIT;
+  field_derivation= collation.derivation;
-  field_repertoire= my_charset_repertoire(charset_arg);
+  field_repertoire= collation.repertoire;
 }
 
 
@@ -2912,67 +2912,6 @@ Field_new_decimal::Field_new_decimal(uchar *ptr_arg,
 }
 
 
-Field_new_decimal::Field_new_decimal(uint32 len_arg,
-                                     bool maybe_null_arg,
-                                     const LEX_CSTRING *name,
-                                     uint8 dec_arg,
-                                     bool unsigned_arg)
-  :Field_num((uchar*) 0, len_arg,
-             maybe_null_arg ? (uchar*) "": 0, 0,
-             NONE, name, dec_arg, 0, unsigned_arg)
-{
-  precision= my_decimal_length_to_precision(len_arg, dec_arg, unsigned_arg);
-  set_if_smaller(precision, DECIMAL_MAX_PRECISION);
-  DBUG_ASSERT((precision <= DECIMAL_MAX_PRECISION) &&
-              (dec <= DECIMAL_MAX_SCALE));
-  bin_size= my_decimal_get_binary_size(precision, dec);
-}
-
-
-Field *Field_new_decimal::create_from_item(MEM_ROOT *mem_root, Item *item)
-{
-  uint8 dec= item->decimals;
-  uint8 intg= item->decimal_precision() - dec;
-  uint32 len= item->max_char_length();
-  DBUG_ASSERT (item->result_type() == DECIMAL_RESULT);
-
-  /*
-    Trying to put too many digits overall in a DECIMAL(prec,dec)
-    will always throw a warning. We must limit dec to
-    DECIMAL_MAX_SCALE however to prevent an assert() later.
-  */
-
-  if (dec > 0)
-  {
-    signed int overflow;
-
-    dec= MY_MIN(dec, DECIMAL_MAX_SCALE);
-
-    /*
-      If the value still overflows the field with the corrected dec,
-      we'll throw out decimals rather than integers. This is still
-      bad and of course throws a truncation warning.
-      +1: for decimal point
-      */
-
-    const int required_length=
-      my_decimal_precision_to_length(intg + dec, dec,
-                                     item->unsigned_flag);
-
-    overflow= required_length - len;
-
-    if (overflow > 0)
-      dec= MY_MAX(0, dec - overflow);            // too long, discard fract
-    else
-      /* Corrected value fits. */
-      len= required_length;
-  }
-  return new (mem_root)
-    Field_new_decimal(len, item->maybe_null, &item->name,
-                      dec, item->unsigned_flag);
-}
-
-
 int Field_new_decimal::reset(void)
 {
   store_value(&decimal_zero);
@@ -7817,10 +7756,10 @@ Field_blob::Field_blob(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
 		       enum utype unireg_check_arg,
                        const LEX_CSTRING *field_name_arg,
                        TABLE_SHARE *share, uint blob_pack_length,
-		       CHARSET_INFO *cs)
+		       const DTCollation &collation)
   :Field_longstr(ptr_arg, BLOB_PACK_LENGTH_TO_MAX_LENGH(blob_pack_length),
                  null_ptr_arg, null_bit_arg, unireg_check_arg, field_name_arg,
-                 cs),
+                 collation),
    packlength(blob_pack_length)
 {
   DBUG_ASSERT(blob_pack_length <= 4); // Only pack lengths 1-4 supported currently
@@ -8237,6 +8176,22 @@ void Field_blob::sort_string(uchar *to,uint length)
 }
 
 
+/*
+  Return the data type handler, according to packlength.
+  Implemented in field.cc rather than in field.h
+  to avoid exporting type_handler_xxx with MYSQL_PLUGIN_IMPORT.
+*/
+const Type_handler *Field_blob::type_handler() const
+{
+  switch (packlength) {
+  case 1: return &type_handler_tiny_blob;
+  case 2: return &type_handler_blob;
+  case 3: return &type_handler_medium_blob;
+  }
+  return &type_handler_long_blob;
+}
+
+
 void Field_blob::sql_type(String &res) const
 {
   const char *str;
@@ -8638,12 +8593,16 @@ int Field_enum::store(const char *from,uint length,CHARSET_INFO *cs)
       {
 	tmp=0;
 	set_warning(WARN_DATA_TRUNCATED, 1);
+	err= 1;
       }
-      if (!get_thd()->count_cuted_fields)
+      if (!get_thd()->count_cuted_fields && !length)
         err= 0;
     }
     else
+    {
       set_warning(WARN_DATA_TRUNCATED, 1);
+      err= 1;
+    }
   }
   store_type((ulonglong) tmp);
   return err;
@@ -8817,6 +8776,7 @@ int Field_set::store(const char *from,uint length,CHARSET_INFO *cs)
     {
       tmp=0;      
       set_warning(WARN_DATA_TRUNCATED, 1);
+      err= 1;
     }
   }
   else if (got_warning)
@@ -9055,12 +9015,17 @@ uint Field_num::is_equal(Create_field *new_field)
 }
 
 
+bool Field_enum::can_optimize_range(const Item_bool_func *cond,
+                                    const Item *item,
+                                    bool is_eq_func) const
+{
+  return item->cmp_type() != TIME_RESULT;
+}
+
+
 bool Field_enum::can_optimize_keypart_ref(const Item_bool_func *cond,
                                           const Item *item) const
 {
-  DBUG_ASSERT(cmp_type() == INT_RESULT);
-  DBUG_ASSERT(result_type() == STRING_RESULT);
-
   switch (item->cmp_type())
   {
   case TIME_RESULT:
@@ -10717,7 +10682,7 @@ uint32 Field_blob::char_length() const
   case 3:
     return 16777215;
   case 4:
-    return (uint32) 4294967295U;
+    return (uint32) UINT_MAX32;
   default:
     DBUG_ASSERT(0); // we should never go here
     return 0;
@@ -10770,7 +10735,7 @@ uint32 Field_blob::max_display_length()
   case 3:
     return 16777215 * field_charset->mbmaxlen;
   case 4:
-    return (uint32) 4294967295U;
+    return (uint32) UINT_MAX32;
   default:
     DBUG_ASSERT(0); // we should never go here
     return 0;

sql/field.h

@@ -525,27 +525,6 @@ inline bool is_temporal_type(enum_field_types type)
 }
 
 
-/**
-  Tests if field type is temporal and has time part,
-  i.e. represents TIME, DATETIME or TIMESTAMP types in SQL.
-
-  @param type    Field type, as returned by field->type().
-  @retval true   If field type is temporal type with time part.
-  @retval false  If field type is not temporal type with time part.
-*/
-inline bool is_temporal_type_with_time(enum_field_types type)
-{
-  switch (type)
-  {
-  case MYSQL_TYPE_TIME:
-  case MYSQL_TYPE_DATETIME:
-  case MYSQL_TYPE_TIMESTAMP:
-    return true;
-  default:
-    return false;
-  }
-}
-
 enum enum_vcol_info_type
 {
   VCOL_GENERATED_VIRTUAL, VCOL_GENERATED_STORED,
@@ -872,11 +851,13 @@ public:
    to be quoted when used in constructing an SQL query.
   */
   virtual bool str_needs_quotes() { return FALSE; }
-  virtual Item_result result_type () const=0;
+  Item_result result_type () const
-  virtual Item_result cmp_type () const { return result_type(); }
-  virtual const Type_handler *cast_to_int_type_handler() const
   {
-    return Type_handler::get_handler_by_field_type(type());
+    return type_handler()->result_type();
+  }
+  Item_result cmp_type () const
+  {
+    return type_handler()->cmp_type();
   }
   static bool type_can_have_key_part(enum_field_types);
   static enum_field_types field_type_merge(enum_field_types, enum_field_types);
@@ -992,8 +973,15 @@ public:
   virtual bool zero_pack() const { return 1; }
   virtual enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
   virtual uint32 key_length() const { return pack_length(); }
-  virtual enum_field_types type() const =0;
+  virtual const Type_handler *type_handler() const= 0;
-  virtual enum_field_types real_type() const { return type(); }
+  virtual enum_field_types type() const
+  {
+    return type_handler()->field_type();
+  }
+  virtual enum_field_types real_type() const
+  {
+    return type_handler()->real_field_type();
+  }
   virtual enum_field_types binlog_type() const
   {
     /*
@@ -1318,9 +1306,6 @@ public:
   virtual enum Derivation derivation(void) const
   { return DERIVATION_IMPLICIT; }
   virtual uint repertoire(void) const { return MY_REPERTOIRE_UNICODE30; }
-  virtual void set_derivation(enum Derivation derivation_arg,
-                              uint repertoire_arg)
-  { }
   virtual int set_time() { return 1; }
   bool set_warning(Sql_condition::enum_warning_level, unsigned int code,
                    int cuted_increment) const;
@@ -1610,7 +1595,6 @@ public:
 	    uchar null_bit_arg, utype unireg_check_arg,
 	    const LEX_CSTRING *field_name_arg,
             uint8 dec_arg, bool zero_arg, bool unsigned_arg);
-  enum Item_result result_type () const { return INT_RESULT; }
   enum Derivation derivation(void) const { return DERIVATION_NUMERIC; }
   uint repertoire(void) const { return MY_REPERTOIRE_NUMERIC; }
   CHARSET_INFO *charset(void) const { return &my_charset_numeric; }
@@ -1672,8 +1656,8 @@ public:
                                         const Item_equal *item_equal);
   Field_str(uchar *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
 	    uchar null_bit_arg, utype unireg_check_arg,
-	    const LEX_CSTRING *field_name_arg, CHARSET_INFO *charset);
+	    const LEX_CSTRING *field_name_arg,
-  Item_result result_type () const { return STRING_RESULT; }
+	    const DTCollation &collation);
   uint decimals() const { return NOT_FIXED_DEC; }
   int  save_in_field(Field *to) { return save_in_field_str(to); }
   bool memcpy_field_possible(const Field *from) const
@@ -1693,12 +1677,6 @@ public:
   uint repertoire(void) const { return field_repertoire; }
   CHARSET_INFO *charset(void) const { return field_charset; }
   enum Derivation derivation(void) const { return field_derivation; }
-  void set_derivation(enum Derivation derivation_arg,
-                      uint repertoire_arg)
-  {
-    field_derivation= derivation_arg;
-    field_repertoire= repertoire_arg;
-  }
   bool binary() const { return field_charset == &my_charset_bin; }
   uint32 max_display_length() { return field_length; }
   friend class Create_field;
@@ -1740,9 +1718,10 @@ protected:
 public:
   Field_longstr(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
                 uchar null_bit_arg, utype unireg_check_arg,
-                const LEX_CSTRING *field_name_arg, CHARSET_INFO *charset_arg)
+                const LEX_CSTRING *field_name_arg,
+                const DTCollation &collation)
     :Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
-               field_name_arg, charset_arg)
+               field_name_arg, collation)
     {}
 
   int store_decimal(const my_decimal *d);
@@ -1781,7 +1760,6 @@ public:
                field_name_arg, dec_arg, zero_arg, unsigned_arg),
     not_fixed(dec_arg >= FLOATING_POINT_DECIMALS)
     {}
-  Item_result result_type () const { return REAL_RESULT; }
   Copy_func *get_copy_func(const Field *from) const
   {
     return do_field_real;
@@ -1818,7 +1796,7 @@ public:
                 unireg_check_arg, field_name_arg,
                 dec_arg, zero_arg, unsigned_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_DECIMAL;}
+  const Type_handler *type_handler() const { return &type_handler_olddecimal; }
   enum ha_base_keytype key_type() const
   { return zerofill ? HA_KEYTYPE_BINARY : HA_KEYTYPE_NUM; }
   Copy_func *get_copy_func(const Field *from) const
@@ -1863,12 +1841,8 @@ public:
                     enum utype unireg_check_arg,
                     const LEX_CSTRING *field_name_arg,
                     uint8 dec_arg, bool zero_arg, bool unsigned_arg);
-  Field_new_decimal(uint32 len_arg, bool maybe_null_arg,
+  const Type_handler *type_handler() const { return &type_handler_newdecimal; }
-                    const LEX_CSTRING *field_name_arg, uint8 dec_arg,
-                    bool unsigned_arg);
-  enum_field_types type() const { return MYSQL_TYPE_NEWDECIMAL;}
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
-  Item_result result_type () const { return DECIMAL_RESULT; }
   Copy_func *get_copy_func(const Field *from) const
   {
     //  if (from->real_type() == MYSQL_TYPE_BIT) // QQ: why?
@@ -1918,7 +1892,6 @@ public:
                              uint16 mflags, int *order_var);
   uint is_equal(Create_field *new_field);
   virtual const uchar *unpack(uchar* to, const uchar *from, const uchar *from_end, uint param_data);
-  static Field *create_from_item(MEM_ROOT *root, Item *);
   Item *get_equal_const_item(THD *thd, const Context &ctx, Item *const_item);
 };
 
@@ -1933,7 +1906,7 @@ public:
 	       unireg_check_arg, field_name_arg,
 	       0, zero_arg,unsigned_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_TINY;}
+  const Type_handler *type_handler() const { return &type_handler_tiny; }
   enum ha_base_keytype key_type() const
     { return unsigned_flag ? HA_KEYTYPE_BINARY : HA_KEYTYPE_INT8; }
   int store(const char *to,uint length,CHARSET_INFO *charset);
@@ -1983,7 +1956,7 @@ public:
     :Field_num((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
 	       NONE, field_name_arg, 0, 0, unsigned_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_SHORT;}
+  const Type_handler *type_handler() const { return &type_handler_short; }
   enum ha_base_keytype key_type() const
     { return unsigned_flag ? HA_KEYTYPE_USHORT_INT : HA_KEYTYPE_SHORT_INT;}
   int store(const char *to,uint length,CHARSET_INFO *charset);
@@ -2018,7 +1991,7 @@ public:
 	       unireg_check_arg, field_name_arg,
 	       0, zero_arg,unsigned_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_INT24;}
+  const Type_handler *type_handler() const { return &type_handler_int24; }
   enum ha_base_keytype key_type() const
     { return unsigned_flag ? HA_KEYTYPE_UINT24 : HA_KEYTYPE_INT24; }
   int store(const char *to,uint length,CHARSET_INFO *charset);
@@ -2058,7 +2031,7 @@ public:
     :Field_num((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
 	       NONE, field_name_arg,0,0,unsigned_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_LONG;}
+  const Type_handler *type_handler() const { return &type_handler_long; }
   enum ha_base_keytype key_type() const
     { return unsigned_flag ? HA_KEYTYPE_ULONG_INT : HA_KEYTYPE_LONG_INT; }
   int store(const char *to,uint length,CHARSET_INFO *charset);
@@ -2104,7 +2077,7 @@ public:
     :Field_num((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
 	       NONE, field_name_arg,0,0,unsigned_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_LONGLONG;}
+  const Type_handler *type_handler() const { return &type_handler_longlong; }
   enum ha_base_keytype key_type() const
     { return unsigned_flag ? HA_KEYTYPE_ULONGLONG : HA_KEYTYPE_LONGLONG; }
   int store(const char *to,uint length,CHARSET_INFO *charset);
@@ -2158,7 +2131,7 @@ public:
       if (dec_arg >= FLOATING_POINT_DECIMALS)
         dec_arg= NOT_FIXED_DEC;
     }
-  enum_field_types type() const { return MYSQL_TYPE_FLOAT;}
+  const Type_handler *type_handler() const { return &type_handler_float; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_FLOAT; }
   int store(const char *to,uint length,CHARSET_INFO *charset);
   int store(double nr);
@@ -2209,7 +2182,7 @@ public:
       if (dec_arg >= FLOATING_POINT_DECIMALS)
         dec_arg= NOT_FIXED_DEC;
     }
-  enum_field_types type() const { return MYSQL_TYPE_DOUBLE;}
+  const Type_handler *type_handler() const { return &type_handler_double; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_DOUBLE; }
   int  store(const char *to,uint length,CHARSET_INFO *charset);
   int  store(double nr);
@@ -2242,11 +2215,11 @@ class Field_null :public Field_str {
 public:
   Field_null(uchar *ptr_arg, uint32 len_arg,
 	     enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg,
-	     CHARSET_INFO *cs)
+	     const DTCollation &collation)
     :Field_str(ptr_arg, len_arg, null, 1,
-	       unireg_check_arg, field_name_arg, cs)
+	       unireg_check_arg, field_name_arg, collation)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_NULL;}
+  const Type_handler *type_handler() const { return &type_handler_null; }
   Copy_func *get_copy_func(const Field *from) const
   {
     return do_field_string;
@@ -2296,7 +2269,6 @@ public:
     :Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
                field_name_arg)
     { flags|= BINARY_FLAG; }
-  Item_result result_type () const { return STRING_RESULT; }   
   int  store_hex_hybrid(const char *str, uint length)
   {
     return store(str, length, &my_charset_bin);
@@ -2317,7 +2289,6 @@ public:
   CHARSET_INFO *charset(void) const { return &my_charset_numeric; }
   CHARSET_INFO *sort_charset(void) const { return &my_charset_bin; }
   bool binary() const { return true; }
-  enum Item_result cmp_type () const { return TIME_RESULT; }
   bool val_bool() { return val_real() != 0e0; }
   uint is_equal(Create_field *new_field);
   bool eq_def(const Field *field) const
@@ -2394,7 +2365,7 @@ public:
 		  enum utype unireg_check_arg,
                   const LEX_CSTRING *field_name_arg,
 		  TABLE_SHARE *share);
-  enum_field_types type() const { return MYSQL_TYPE_TIMESTAMP;}
+  const Type_handler *type_handler() const { return &type_handler_timestamp; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONG_INT; }
   int  store(const char *to,uint length,CHARSET_INFO *charset);
   int  store(double nr);
@@ -2528,7 +2499,7 @@ public:
     Field_timestamp_with_dec(ptr_arg, null_ptr_arg, null_bit_arg,
                              unireg_check_arg, field_name_arg, share, dec_arg)
     {}
-  enum_field_types real_type() const { return MYSQL_TYPE_TIMESTAMP2; }
+  const Type_handler *type_handler() const { return &type_handler_timestamp2; }
   enum_field_types binlog_type() const { return MYSQL_TYPE_TIMESTAMP2; }
   uint32 pack_length() const
   {
@@ -2559,14 +2530,19 @@ public:
     :Field_tiny(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
 		unireg_check_arg, field_name_arg, 1, 1)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_YEAR;}
+  const Type_handler *type_handler() const { return &type_handler_year; }
   Copy_func *get_copy_func(const Field *from) const
   {
     if (eq_def(from))
       return get_identical_copy_func();
     switch (from->cmp_type()) {
     case STRING_RESULT:
+    {
+      const Type_handler *handler= from->type_handler();
+      if (handler == &type_handler_enum || handler == &type_handler_set)
+        return do_field_int;
       return do_field_string;
+    }
     case TIME_RESULT:
       return do_field_temporal;
     case DECIMAL_RESULT:
@@ -2604,7 +2580,7 @@ public:
 	     enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg)
     :Field_temporal_with_date(ptr_arg, MAX_DATE_WIDTH, null_ptr_arg, null_bit_arg,
                               unireg_check_arg, field_name_arg) {}
-  enum_field_types type() const { return MYSQL_TYPE_DATE;}
+  const Type_handler *type_handler() const { return &type_handler_date; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONG_INT; }
   int reset(void) { ptr[0]=ptr[1]=ptr[2]=ptr[3]=0; return 0; }
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
@@ -2640,8 +2616,7 @@ public:
     :Field_temporal_with_date(ptr_arg, MAX_DATE_WIDTH, null_ptr_arg, null_bit_arg,
                               unireg_check_arg, field_name_arg)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_DATE;}
+  const Type_handler *type_handler() const { return &type_handler_newdate; }
-  enum_field_types real_type() const { return MYSQL_TYPE_NEWDATE; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_UINT24; }
   int reset(void) { ptr[0]=ptr[1]=ptr[2]=0; return 0; }
   double val_real(void);
@@ -2679,7 +2654,7 @@ public:
     :Field_temporal(ptr_arg, length_arg, null_ptr_arg, null_bit_arg,
                     unireg_check_arg, field_name_arg), curdays(0)
     {}
-  enum_field_types type() const { return MYSQL_TYPE_TIME;}
+  const Type_handler *type_handler() const { return &type_handler_time; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_INT24; }
   Copy_func *get_copy_func(const Field *from) const
   {
@@ -2791,7 +2766,7 @@ public:
   {
     DBUG_ASSERT(dec <= TIME_SECOND_PART_DIGITS);
   }
-  enum_field_types real_type() const { return MYSQL_TYPE_TIME2; }
+  const Type_handler *type_handler() const { return &type_handler_time2; }
   enum_field_types binlog_type() const { return MYSQL_TYPE_TIME2; }
   uint32 pack_length() const
   {
@@ -2833,7 +2808,7 @@ public:
           unireg_check == TIMESTAMP_DNUN_FIELD)
         flags|= ON_UPDATE_NOW_FLAG;
     }
-  enum_field_types type() const { return MYSQL_TYPE_DATETIME;}
+  const Type_handler *type_handler() const { return &type_handler_datetime; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONGLONG; }
   double val_real(void);
   longlong val_int(void);
@@ -2950,7 +2925,7 @@ public:
     :Field_datetime_with_dec(ptr_arg, null_ptr_arg, null_bit_arg,
                              unireg_check_arg, field_name_arg, dec_arg)
   {}
-  enum_field_types real_type() const { return MYSQL_TYPE_DATETIME2; }
+  const Type_handler *type_handler() const { return &type_handler_datetime2; }
   enum_field_types binlog_type() const { return MYSQL_TYPE_DATETIME2; }
   uint32 pack_length() const
   {
@@ -3028,29 +3003,35 @@ class Field_string :public Field_longstr {
   public:
     Warn_filter_string(const THD *thd, const Field_string *field);
   };
+  bool is_var_string() const
+  {
+    return can_alter_field_type &&
+           orig_table &&
+           (orig_table->s->db_create_options & HA_OPTION_PACK_RECORD) &&
+           field_length >= 4 &&
+           orig_table->s->frm_version < FRM_VER_TRUE_VARCHAR;
+  }
 public:
   bool can_alter_field_type;
   Field_string(uchar *ptr_arg, uint32 len_arg,uchar *null_ptr_arg,
 	       uchar null_bit_arg,
 	       enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg,
-	       CHARSET_INFO *cs)
+	       const DTCollation &collation)
     :Field_longstr(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
-                   unireg_check_arg, field_name_arg, cs),
+                   unireg_check_arg, field_name_arg, collation),
      can_alter_field_type(1) {};
   Field_string(uint32 len_arg,bool maybe_null_arg,
                const LEX_CSTRING *field_name_arg,
-               CHARSET_INFO *cs)
+               const DTCollation &collation)
     :Field_longstr((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
-                   NONE, field_name_arg, cs),
+                   NONE, field_name_arg, collation),
      can_alter_field_type(1) {};
 
-  enum_field_types type() const
+  const Type_handler *type_handler() const
   {
-    return ((can_alter_field_type && orig_table &&
+    if (is_var_string())
-             orig_table->s->db_create_options & HA_OPTION_PACK_RECORD &&
+      return &type_handler_var_string;
-	     field_length >= 4) &&
+    return &type_handler_string;
-            orig_table->s->frm_version < FRM_VER_TRUE_VARCHAR ?
-	    MYSQL_TYPE_VAR_STRING : MYSQL_TYPE_STRING);
   }
   enum ha_base_keytype key_type() const
     { return binary() ? HA_KEYTYPE_BINARY : HA_KEYTYPE_TEXT; }
@@ -3092,7 +3073,6 @@ public:
   uint packed_col_length(const uchar *to, uint length);
   uint max_packed_col_length(uint max_length);
   uint size_of() const { return sizeof(*this); }
-  enum_field_types real_type() const { return MYSQL_TYPE_STRING; }
   bool has_charset(void) const
   { return charset() == &my_charset_bin ? FALSE : TRUE; }
   Field *make_new_field(MEM_ROOT *root, TABLE *new_table, bool keep_type);
@@ -3123,24 +3103,24 @@ public:
                   uint32 len_arg, uint length_bytes_arg,
                   uchar *null_ptr_arg, uchar null_bit_arg,
 		  enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg,
-		  TABLE_SHARE *share, CHARSET_INFO *cs)
+		  TABLE_SHARE *share, const DTCollation &collation)
     :Field_longstr(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
-                   unireg_check_arg, field_name_arg, cs),
+                   unireg_check_arg, field_name_arg, collation),
      length_bytes(length_bytes_arg)
   {
     share->varchar_fields++;
   }
   Field_varstring(uint32 len_arg,bool maybe_null_arg,
                   const LEX_CSTRING *field_name_arg,
-                  TABLE_SHARE *share, CHARSET_INFO *cs)
+                  TABLE_SHARE *share, const DTCollation &collation)
     :Field_longstr((uchar*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
-                   NONE, field_name_arg, cs),
+                   NONE, field_name_arg, collation),
      length_bytes(len_arg < 256 ? 1 :2)
   {
     share->varchar_fields++;
   }
 
-  enum_field_types type() const { return MYSQL_TYPE_VARCHAR; }
+  const Type_handler *type_handler() const { return &type_handler_varchar; }
   enum ha_base_keytype key_type() const;
   uint row_pack_length() const { return field_length; }
   bool zero_pack() const { return 0; }
@@ -3184,7 +3164,6 @@ public:
   uint max_packed_col_length(uint max_length);
   uint32 data_length();
   uint size_of() const { return sizeof(*this); }
-  enum_field_types real_type() const { return MYSQL_TYPE_VARCHAR; }
   bool has_charset(void) const
   { return charset() == &my_charset_bin ? FALSE : TRUE; }
   Field *make_new_field(MEM_ROOT *root, TABLE *new_table, bool keep_type);
@@ -3224,20 +3203,21 @@ protected:
 public:
   Field_blob(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
 	     enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg,
-	     TABLE_SHARE *share, uint blob_pack_length, CHARSET_INFO *cs);
+	     TABLE_SHARE *share, uint blob_pack_length,
+	     const DTCollation &collation);
   Field_blob(uint32 len_arg,bool maybe_null_arg, const LEX_CSTRING *field_name_arg,
-             CHARSET_INFO *cs)
+             const DTCollation &collation)
     :Field_longstr((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
-                   NONE, field_name_arg, cs),
+                   NONE, field_name_arg, collation),
     packlength(4)
   {
     flags|= BLOB_FLAG;
   }
   Field_blob(uint32 len_arg,bool maybe_null_arg,
              const LEX_CSTRING *field_name_arg,
-	     CHARSET_INFO *cs, bool set_packlength)
+             const DTCollation &collation, bool set_packlength)
     :Field_longstr((uchar*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
-                   NONE, field_name_arg, cs)
+                   NONE, field_name_arg, collation)
   {
     flags|= BLOB_FLAG;
     packlength= 4;
@@ -3252,8 +3232,24 @@ public:
     :Field_longstr((uchar*) 0, 0, (uchar*) "", 0, NONE, &temp_lex_str,
                    system_charset_info),
     packlength(packlength_arg) {}
+  const Type_handler *type_handler() const;
   /* Note that the default copy constructor is used, in clone() */
-  enum_field_types type() const { return MYSQL_TYPE_BLOB;}
+  enum_field_types type() const
+  {
+    /*
+      We cannot return type_handler()->field_type() here.
+      Some pieces of the code (e.g. in engines) rely on the fact
+      that Field::type(), Field::real_type() and Item_field::field_type()
+      return MYSQL_TYPE_BLOB for all blob variants.
+      We should eventually fix all such code pieces to expect
+      all BLOB type codes.
+    */
+    return MYSQL_TYPE_BLOB;
+  }
+  enum_field_types real_type() const
+  {
+    return MYSQL_TYPE_BLOB;
+  }
   enum ha_base_keytype key_type() const
     { return binary() ? HA_KEYTYPE_VARBINARY2 : HA_KEYTYPE_VARTEXT2; }
   Copy_func *get_copy_func(const Field *from) const
@@ -3438,12 +3434,19 @@ public:
      :Field_blob(ptr_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
                  field_name_arg, share, blob_pack_length, &my_charset_bin)
   { geom_type= geom_type_arg; srid= field_srid; }
-  Field_geom(uint32 len_arg,bool maybe_null_arg, const LEX_CSTRING *field_name_arg,
-	     TABLE_SHARE *share, enum geometry_type geom_type_arg)
-    :Field_blob(len_arg, maybe_null_arg, field_name_arg, &my_charset_bin)
-  { geom_type= geom_type_arg; srid= 0; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_VARBINARY2; }
-  enum_field_types type() const { return MYSQL_TYPE_GEOMETRY; }
+  const Type_handler *type_handler() const
+  {
+    return &type_handler_geometry;
+  }
+  enum_field_types type() const
+  {
+    return MYSQL_TYPE_GEOMETRY;
+  }
+  enum_field_types real_type() const
+  {
+    return MYSQL_TYPE_GEOMETRY;
+  }
   bool can_optimize_range(const Item_bool_func *cond,
                                   const Item *item,
                                   bool is_eq_func) const;
@@ -3492,20 +3495,15 @@ public:
              enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg,
              uint packlength_arg,
              TYPELIB *typelib_arg,
-             CHARSET_INFO *charset_arg)
+             const DTCollation &collation)
     :Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
-	       unireg_check_arg, field_name_arg, charset_arg),
+	       unireg_check_arg, field_name_arg, collation),
     packlength(packlength_arg),typelib(typelib_arg)
   {
       flags|=ENUM_FLAG;
   }
   Field *make_new_field(MEM_ROOT *root, TABLE *new_table, bool keep_type);
-  enum_field_types type() const { return MYSQL_TYPE_STRING; }
+  const Type_handler *type_handler() const { return &type_handler_enum; }
-  enum Item_result cmp_type () const { return INT_RESULT; }
-  const Type_handler *cast_to_int_type_handler() const
-  {
-    return &type_handler_longlong;
-  }
   enum ha_base_keytype key_type() const;
   Copy_func *get_copy_func(const Field *from) const
   {
@@ -3546,7 +3544,6 @@ public:
   void store_type(ulonglong value);
   void sql_type(String &str) const;
   uint size_of() const { return sizeof(*this); }
-  enum_field_types real_type() const { return MYSQL_TYPE_ENUM; }
   uint pack_length_from_metadata(uint field_metadata)
   { return (field_metadata & 0x00ff); }
   uint row_pack_length() const { return pack_length(); }
@@ -3576,6 +3573,9 @@ public:
     */
     return false;
   }
+  bool can_optimize_range(const Item_bool_func *cond,
+                          const Item *item,
+                          bool is_eq_func) const;
 private:
   int do_save_field_metadata(uchar *first_byte);
   uint is_equal(Create_field *new_field);
@@ -3588,12 +3588,12 @@ public:
 	    uchar null_bit_arg,
 	    enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg,
 	    uint32 packlength_arg,
-	    TYPELIB *typelib_arg, CHARSET_INFO *charset_arg)
+	    TYPELIB *typelib_arg, const DTCollation &collation)
     :Field_enum(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
 		    unireg_check_arg, field_name_arg,
                 packlength_arg,
-                typelib_arg,charset_arg),
+                typelib_arg, collation),
-      empty_set_string("", 0, charset_arg)
+      empty_set_string("", 0, collation.collation)
     {
       flags=(flags & ~ENUM_FLAG) | SET_FLAG;
     }
@@ -3606,7 +3606,7 @@ public:
   String *val_str(String*,String *);
   void sql_type(String &str) const;
   uint size_of() const { return sizeof(*this); }
-  enum_field_types real_type() const { return MYSQL_TYPE_SET; }
+  const Type_handler *type_handler() const { return &type_handler_set; }
   bool has_charset(void) const { return TRUE; }
 private:
   const String empty_set_string;
@@ -3636,13 +3636,12 @@ public:
   Field_bit(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
             uchar null_bit_arg, uchar *bit_ptr_arg, uchar bit_ofs_arg,
             enum utype unireg_check_arg, const LEX_CSTRING *field_name_arg);
-  enum_field_types type() const { return MYSQL_TYPE_BIT; }
+  const Type_handler *type_handler() const { return &type_handler_bit; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_BIT; }
   uint32 key_length() const { return (uint32) (field_length + 7) / 8; }
   uint32 max_data_length() const { return (field_length + 7) / 8; }
   uint32 max_display_length() { return field_length; }
   uint size_of() const { return sizeof(*this); }
-  Item_result result_type () const { return INT_RESULT; }
   int reset(void) { 
     bzero(ptr, bytes_in_rec); 
     if (bit_ptr && (bit_len > 0))  // reset odd bits among null bits

sql/item.cc

@@ -518,7 +518,7 @@ Item::Item(THD *thd):
   tables.
 */
 Item::Item(THD *thd, Item *item):
-  Type_std_attributes(item),
+  Type_all_attributes(item),
   join_tab_idx(item->join_tab_idx),
   is_expensive_cache(-1),
   rsize(0),
@@ -2348,7 +2348,7 @@ void my_coll_agg_error(Item** args, uint count, const char *fname,
 }
 
 
-bool Item_func_or_sum::agg_item_collations(DTCollation &c, const char *fname,
+bool Type_std_attributes::agg_item_collations(DTCollation &c, const char *fname,
                                               Item **av, uint count,
                                               uint flags, int item_sep)
 {
@@ -2395,7 +2395,7 @@ bool Item_func_or_sum::agg_item_collations(DTCollation &c, const char *fname,
 }
 
 
-bool Item_func_or_sum::agg_item_set_converter(const DTCollation &coll,
+bool Type_std_attributes::agg_item_set_converter(const DTCollation &coll,
                                                  const char *fname,
                                                  Item **args, uint nargs,
                                                  uint flags, int item_sep)
@@ -3780,7 +3780,7 @@ bool Item_param::set_from_item(THD *thd, Item *item)
     }
   }
   struct st_value tmp;
-  if (!item->store(&tmp, 0))
+  if (!item->save_in_value(&tmp))
   {
     unsigned_flag= item->unsigned_flag;
     switch (item->cmp_type()) {
@@ -5834,24 +5834,6 @@ error:
 }
 
 
-const Type_handler *Item_field::real_type_handler() const
-{
-  /*
-    Item_field::field_type ask Field_type() but sometimes field return
-    a different type, like for enum/set, so we need to ask real type.
-  */
-  if (field->is_created_from_null_item)
-    return &type_handler_null;
-  /* work around about varchar type field detection */
-  enum_field_types type= field->real_type();
-  // TODO: We should add Field::real_type_handler() eventually
-  if (type == MYSQL_TYPE_STRING && field->type() == MYSQL_TYPE_VAR_STRING)
-    type= MYSQL_TYPE_VAR_STRING;
-  return Type_handler::get_handler_by_real_type(type);
-
-}
-
-
 /*
   @brief
   Mark virtual columns as used in a partitioning expression 
@@ -6216,178 +6198,6 @@ bool Item::eq_by_collation(Item *item, bool binary_cmp, CHARSET_INFO *cs)
 }  
 
 
-/**
-  Create a field to hold a string value from an item.
-
-  If too_big_for_varchar() create a blob @n
-  If max_length > 0 create a varchar @n
-  If max_length == 0 create a CHAR(0) 
-
-  @param table		Table for which the field is created
-*/
-
-Field *Item::make_string_field(TABLE *table)
-{
-  Field *field;
-  MEM_ROOT *mem_root= table->in_use->mem_root;
-  DBUG_ASSERT(collation.collation);
-  /* 
-    Note: the following check is repeated in 
-    subquery_types_allow_materialization():
-  */
-  if (too_big_for_varchar())
-    field= new (mem_root)
-      Field_blob(max_length, maybe_null, &name,
-                 collation.collation, TRUE);
-  /* Item_type_holder holds the exact type, do not change it */
-  else if (max_length > 0 &&
-      (type() != Item::TYPE_HOLDER || field_type() != MYSQL_TYPE_STRING))
-    field= new (mem_root)
-      Field_varstring(max_length, maybe_null, &name, table->s,
-                      collation.collation);
-  else
-    field= new (mem_root)
-      Field_string(max_length, maybe_null, &name, collation.collation);
-  if (field)
-    field->init(table);
-  return field;
-}
-
-
-/**
-  Create a field based on field_type of argument.
-
-  This is used to create a field for
-  - IFNULL(x,something)
-  - time functions
-  - prepared statement placeholders
-  - SP variables with data type references: DECLARE a t1.a%TYPE;
-
-  @retval
-    NULL  error
-  @retval
-    \#    Created field
-*/
-
-Field *Item::tmp_table_field_from_field_type(TABLE *table,
-                                             bool fixed_length,
-                                             bool set_blob_packlength)
-{
-  /*
-    The field functions defines a field to be not null if null_ptr is not 0
-  */
-  uchar *null_ptr= maybe_null ? (uchar*) "" : 0;
-  Field *field;
-  MEM_ROOT *mem_root= table->in_use->mem_root;
-
-  switch (field_type()) {
-  case MYSQL_TYPE_DECIMAL:
-  case MYSQL_TYPE_NEWDECIMAL:
-    field= Field_new_decimal::create_from_item(mem_root, this);
-    break;
-  case MYSQL_TYPE_TINY:
-    field= new (mem_root)
-      Field_tiny((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                 &name, 0, unsigned_flag);
-    break;
-  case MYSQL_TYPE_SHORT:
-    field= new (mem_root)
-      Field_short((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                  &name, 0, unsigned_flag);
-    break;
-  case MYSQL_TYPE_LONG:
-    field= new (mem_root)
-      Field_long((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                 &name, 0, unsigned_flag);
-    break;
-#ifdef HAVE_LONG_LONG
-  case MYSQL_TYPE_LONGLONG:
-    field= new (mem_root)
-      Field_longlong((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                     &name, 0, unsigned_flag);
-    break;
-#endif
-  case MYSQL_TYPE_FLOAT:
-    field= new (mem_root)
-      Field_float((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                  &name, decimals, 0, unsigned_flag);
-    break;
-  case MYSQL_TYPE_DOUBLE:
-    field= new (mem_root)
-      Field_double((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                   &name, decimals, 0, unsigned_flag);
-    break;
-  case MYSQL_TYPE_INT24:
-    field= new (mem_root)
-      Field_medium((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                   &name, 0, unsigned_flag);
-    break;
-  case MYSQL_TYPE_NEWDATE:
-  case MYSQL_TYPE_DATE:
-    field= new (mem_root)
-      Field_newdate(0, null_ptr, 0, Field::NONE, &name);
-    break;
-  case MYSQL_TYPE_TIME:
-    field= new_Field_time(mem_root, 0, null_ptr, 0, Field::NONE, &name,
-                          decimals);
-    break;
-  case MYSQL_TYPE_TIMESTAMP:
-    field= new_Field_timestamp(mem_root, 0, null_ptr, 0,
-                               Field::NONE, &name, 0, decimals);
-    break;
-  case MYSQL_TYPE_DATETIME:
-    field= new_Field_datetime(mem_root, 0, null_ptr, 0, Field::NONE,
-                              &name, decimals);
-    break;
-  case MYSQL_TYPE_YEAR:
-    field= new (mem_root)
-      Field_year((uchar*) 0, max_length, null_ptr, 0, Field::NONE,
-                 &name);
-    break;
-  case MYSQL_TYPE_BIT:
-    field= new (mem_root)
-      Field_bit_as_char(NULL, max_length, null_ptr, 0, Field::NONE,
-                        &name);
-    break;
-  default:
-    /* This case should never be chosen */
-    DBUG_ASSERT(0);
-    /* If something goes awfully wrong, it's better to get a string than die */
-  case MYSQL_TYPE_NULL:
-  case MYSQL_TYPE_STRING:
-    if (fixed_length && !too_big_for_varchar())
-    {
-      field= new (mem_root)
-        Field_string(max_length, maybe_null, &name, collation.collation);
-      break;
-    }
-    /* Fall through to make_string_field() */
-  case MYSQL_TYPE_ENUM:
-  case MYSQL_TYPE_SET:
-  case MYSQL_TYPE_VAR_STRING:
-  case MYSQL_TYPE_VARCHAR:
-    return make_string_field(table);
-  case MYSQL_TYPE_TINY_BLOB:
-  case MYSQL_TYPE_MEDIUM_BLOB:
-  case MYSQL_TYPE_LONG_BLOB:
-  case MYSQL_TYPE_BLOB:
-    field= new (mem_root)
-           Field_blob(max_length, maybe_null, &name,
-                      collation.collation, set_blob_packlength);
-    break;					// Blob handled outside of case
-#ifdef HAVE_SPATIAL
-  case MYSQL_TYPE_GEOMETRY:
-    field= new (mem_root)
-      Field_geom(max_length, maybe_null, &name, table->s,
-                 get_geometry_type());
-#endif /* HAVE_SPATIAL */
-  }
-  if (field)
-    field->init(table);
-  return field;
-}
-
-
 /* ARGSUSED */
 void Item_field::make_field(THD *thd, Send_field *tmp_field)
 {
@@ -8945,7 +8755,7 @@ bool Item_default_value::fix_fields(THD *thd, Item **items)
   real_arg= arg->real_item();
   if (real_arg->type() != FIELD_ITEM)
   {
-    my_error(ER_NO_DEFAULT_FOR_FIELD, MYF(0), arg->name);
+    my_error(ER_NO_DEFAULT_FOR_FIELD, MYF(0), arg->name.str);
     goto error;
   }
 
@@ -9715,9 +9525,8 @@ Item_cache_temporal::Item_cache_temporal(THD *thd,
                                          enum_field_types field_type_arg):
   Item_cache_int(thd, field_type_arg)
 {
-  if (mysql_type_to_time_type(Item_cache_temporal::field_type()) ==
+  if (mysql_timestamp_type() == MYSQL_TIMESTAMP_ERROR)
-                              MYSQL_TIMESTAMP_ERROR)
+    set_handler(&type_handler_datetime2);
-    set_handler_by_field_type(MYSQL_TYPE_DATETIME);
 }
 
 
@@ -9825,7 +9634,7 @@ bool Item_cache_temporal::get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
   }
 
   unpack_time(value, ltime);
-  ltime->time_type= mysql_type_to_time_type(field_type());
+  ltime->time_type= mysql_timestamp_type();
   if (ltime->time_type == MYSQL_TIMESTAMP_TIME)
   {
     ltime->hour+= (ltime->month*32+ltime->day)*24;
@@ -10267,7 +10076,7 @@ bool Item_type_holder::join_types(THD *thd, Item *item)
   if (aggregate_for_result(item_type_handler))
   {
     my_error(ER_ILLEGAL_PARAMETER_DATA_TYPES2_FOR_OPERATION, MYF(0),
-             Item_type_holder::type_handler()->name().ptr(),
+             Item_type_holder::real_type_handler()->name().ptr(),
              item_type_handler->name().ptr(),
              "UNION");
     DBUG_RETURN(true);
@@ -10375,6 +10184,14 @@ bool Item_type_holder::join_types(THD *thd, Item *item)
   };
   maybe_null|= item->maybe_null;
   get_full_info(item);
+  /*
+    Adjust data type for union, e.g.:
+    - convert type_handler_null to type_handler_string
+    - convert type_handler_olddecimal to type_handler_newdecimal
+    - adjust varchar/blob according to max_length
+  */
+  set_handler(Item_type_holder::
+                real_type_handler()->type_handler_for_union(this));
 
   /* Remember decimal integer part to be used in DECIMAL_RESULT handleng */
   prev_decimal_int_part= decimal_int_part();
@@ -10385,56 +10202,6 @@ bool Item_type_holder::join_types(THD *thd, Item *item)
 }
 
 
-/**
-  Make temporary table field according collected information about type
-  of UNION result.
-
-  @param table  temporary table for which we create fields
-
-  @return
-    created field
-*/
-
-Field *Item_type_holder::make_field_by_type(TABLE *table)
-{
-  /*
-    The field functions defines a field to be not null if null_ptr is not 0
-  */
-  uchar *null_ptr= maybe_null ? (uchar*) "" : 0;
-  Field *field;
-
-  switch (Item_type_holder::real_type_handler()->real_field_type()) {
-  case MYSQL_TYPE_ENUM:
-  {
-    DBUG_ASSERT(enum_set_typelib);
-    field= new Field_enum((uchar *) 0, max_length, null_ptr, 0,
-                          Field::NONE, &name,
-                          get_enum_pack_length(enum_set_typelib->count),
-                          enum_set_typelib, collation.collation);
-    if (field)
-      field->init(table);
-    return field;
-  }
-  case MYSQL_TYPE_SET:
-  {
-    DBUG_ASSERT(enum_set_typelib);
-    field= new Field_set((uchar *) 0, max_length, null_ptr, 0,
-                         Field::NONE, &name,
-                         get_set_pack_length(enum_set_typelib->count),
-                         enum_set_typelib, collation.collation);
-    if (field)
-      field->init(table);
-    return field;
-  }
-  case MYSQL_TYPE_NULL:
-    return make_string_field(table);
-  default:
-    break;
-  }
-  return tmp_table_field_from_field_type(table, false, true);
-}
-
-
 /**
   Get full information from Item about enum/set fields to be able to create
   them later.

sql/item.h

@@ -483,7 +483,7 @@ public:
 
 
 class Item: public Value_source,
-            public Type_std_attributes
+            public Type_all_attributes
 {
   void operator=(Item &);
   /**
@@ -536,10 +536,22 @@ protected:
 
   SEL_TREE *get_mm_tree_for_const(RANGE_OPT_PARAM *param);
 
-  virtual Field *make_string_field(TABLE *table);
+  /**
-  Field *tmp_table_field_from_field_type(TABLE *table,
+    Create a field based on field_type of argument.
-                                         bool fixed_length,
+    This is used to create a field for
-                                         bool set_blob_packlength);
+    - IFNULL(x,something)
+    - time functions
+    - prepared statement placeholders
+    - SP variables with data type references: DECLARE a TYPE OF t1.a;
+    @retval  NULL  error
+    @retval  !NULL on success
+  */
+  Field *tmp_table_field_from_field_type(TABLE *table)
+  {
+    const Type_handler *h= type_handler()->type_handler_for_tmp_table(this);
+    return h->make_and_init_table_field(&name, Record_addr(maybe_null),
+                                        *this, table);
+  }
   Field *create_tmp_field(bool group, TABLE *table, uint convert_int_length);
 
   void push_note_converted_to_negative_complement(THD *thd);
@@ -664,54 +676,9 @@ public:
   */
   virtual inline void quick_fix_field() { fixed= 1; }
 
-  bool store(struct st_value *value, ulonglong fuzzydate)
+  bool save_in_value(struct st_value *value)
   {
-    switch (cmp_type()) {
+    return type_handler()->Item_save_in_value(this, value);
-    case INT_RESULT:
-    {
-      value->m_type= unsigned_flag ? DYN_COL_UINT : DYN_COL_INT;
-      value->value.m_longlong= val_int();
-      break;
-    }
-    case REAL_RESULT:
-    {
-      value->m_type= DYN_COL_DOUBLE;
-      value->value.m_double= val_real();
-      break;
-    }
-    case DECIMAL_RESULT:
-    {
-      value->m_type= DYN_COL_DECIMAL;
-      my_decimal *dec= val_decimal(&value->m_decimal);
-      if (dec != &value->m_decimal && !null_value)
-        my_decimal2decimal(dec, &value->m_decimal);
-      break;
-    }
-    case STRING_RESULT:
-    {
-      value->m_type= DYN_COL_STRING;
-      String *str= val_str(&value->m_string);
-      if (str != &value->m_string && !null_value)
-        value->m_string.set(str->ptr(), str->length(), str->charset());
-      break;
-    }
-    case TIME_RESULT:
-    {
-      value->m_type= DYN_COL_DATETIME;
-      get_date(&value->value.m_time, fuzzydate);
-      break;
-    }
-    case ROW_RESULT:
-      DBUG_ASSERT(false);
-      null_value= true;
-      break;
-    }
-    if (null_value)
-    {
-      value->m_type= DYN_COL_NULL;
-      return true;
-    }
-    return false;
   }
 
   /* Function returns 1 on overflow and -1 on fatal errors */
@@ -1150,10 +1117,7 @@ public:
   */
   uint decimal_scale() const
   {
-    return decimals < NOT_FIXED_DEC ? decimals :
+    return type_handler()->Item_decimal_scale(this);
-           is_temporal_type_with_time(field_type()) ?
-           TIME_SECOND_PART_DIGITS :
-           MY_MIN(max_length, DECIMAL_MAX_SCALE);
   }
   /*
     Returns how many digits a divisor adds into a division result.
@@ -1174,10 +1138,7 @@ public:
   */
   uint divisor_precision_increment() const
   {
-    return decimals <  NOT_FIXED_DEC ? decimals :
+    return type_handler()->Item_divisor_precision_increment(this);
-           is_temporal_type_with_time(field_type()) ?
-           TIME_SECOND_PART_DIGITS :
-           decimals;
   }
   /**
     TIME or DATETIME precision of the item: 0..6
@@ -1745,6 +1706,8 @@ public:
   }
   virtual Field::geometry_type get_geometry_type() const
     { return Field::GEOM_GEOMETRY; };
+  uint uint_geometry_type() const
+  { return get_geometry_type(); }
   String *check_well_formed_result(String *str, bool send_error= 0);
   bool eq_by_collation(Item *item, bool binary_cmp, CHARSET_INFO *cs); 
   bool too_big_for_varchar() const
@@ -2263,7 +2226,7 @@ public:
     based on result_type(), which is less exact.
   */
   Field *create_field_for_create_select(TABLE *table)
-  { return tmp_table_field_from_field_type(table, false, true); }
+  { return tmp_table_field_from_field_type(table); }
 };
 
 
@@ -2639,19 +2602,29 @@ public:
   fast_field_copier setup_fast_field_copier(Field *field);
   table_map used_tables() const;
   table_map all_used_tables() const; 
+  const Type_handler *type_handler() const
+  {
+    const Type_handler *handler= field->type_handler();
+    return handler->type_handler_for_item_field();
+  }
   enum Item_result result_type () const
   {
     return field->result_type();
   }
   const Type_handler *cast_to_int_type_handler() const
   {
-    return field->cast_to_int_type_handler();
+    return field->type_handler()->cast_to_int_type_handler();
   }
   enum_field_types field_type() const
   {
     return field->type();
   }
-  const Type_handler *real_type_handler() const;
+  const Type_handler *real_type_handler() const
+  {
+    if (field->is_created_from_null_item)
+      return &type_handler_null;
+    return field->type_handler();
+  }
   enum_monotonicity_info get_monotonicity_info() const
   {
     return MONOTONIC_STRICT_INCREASING;
@@ -3187,6 +3160,17 @@ public:
   enum Type type() const { return INT_ITEM; }
   enum Item_result result_type () const { return INT_RESULT; }
   enum_field_types field_type() const { return MYSQL_TYPE_LONGLONG; }
+  const Type_handler *type_handler() const
+  {
+    // The same condition is repeated in Item::create_tmp_field()
+    if (max_length > MY_INT32_NUM_DECIMAL_DIGITS - 2)
+      return &type_handler_longlong;
+    return &type_handler_long;
+  }
+  Field *create_tmp_field(bool group, TABLE *table)
+  { return tmp_table_field_from_field_type(table); }
+  Field *create_field_for_create_select(TABLE *table)
+  { return tmp_table_field_from_field_type(table); }
   longlong val_int() { DBUG_ASSERT(fixed == 1); return value; }
   double val_real() { DBUG_ASSERT(fixed == 1); return (double) value; }
   my_decimal *val_decimal(my_decimal *);
@@ -3645,7 +3629,14 @@ public:
     Item_partition_func_safe_string(thd, name_arg, safe_strlen(name_arg), &my_charset_bin)
   { max_length= length; }
   enum Type type() const { return TYPE_HOLDER; }
-  enum_field_types field_type() const { return MYSQL_TYPE_BLOB; }
+  enum_field_types field_type() const
+  {
+    return Item_blob::type_handler()->field_type();
+  }
+  const Type_handler *type_handler() const
+  {
+    return Type_handler::blob_type_handler(max_length);
+  }
   const Type_handler *real_type_handler() const
   {
     // Should not be called, Item_blob is used for SHOW purposes only.
@@ -3653,7 +3644,7 @@ public:
     return &type_handler_varchar;
   }
   Field *create_field_for_schema(THD *thd, TABLE *table)
-  { return tmp_table_field_from_field_type(table, false, true); }
+  { return tmp_table_field_from_field_type(table); }
 };
 
 
@@ -3690,6 +3681,10 @@ public:
     unsigned_flag=1;
   }
   enum_field_types field_type() const { return int_field_type; }
+  const Type_handler *type_handler() const
+  {
+    return Type_handler::get_handler_by_field_type(int_field_type);
+  }
 };
 
 
@@ -4068,80 +4063,31 @@ class Item_func_or_sum: public Item_result_field,
                         public Item_args,
                         public Used_tables_and_const_cache
 {
-  bool agg_item_collations(DTCollation &c, const char *name,
-                           Item **items, uint nitems,
-                           uint flags, int item_sep);
-  bool agg_item_set_converter(const DTCollation &coll, const char *fname,
-                              Item **args, uint nargs,
-                              uint flags, int item_sep);
 protected:
-  /*
-    Collect arguments' character sets together.
-    We allow to apply automatic character set conversion in some cases.
-    The conditions when conversion is possible are:
-    - arguments A and B have different charsets
-    - A wins according to coercibility rules
-      (i.e. a column is stronger than a string constant,
-       an explicit COLLATE clause is stronger than a column)
-    - character set of A is either superset for character set of B,
-      or B is a string constant which can be converted into the
-      character set of A without data loss.
-
-    If all of the above is true, then it's possible to convert
-    B into the character set of A, and then compare according
-    to the collation of A.
-
-    For functions with more than two arguments:
-
-      collect(A,B,C) ::= collect(collect(A,B),C)
-
-    Since this function calls THD::change_item_tree() on the passed Item **
-    pointers, it is necessary to pass the original Item **'s, not copies.
-    Otherwise their values will not be properly restored (see BUG#20769).
-    If the items are not consecutive (eg. args[2] and args[5]), use the
-    item_sep argument, ie.
-
-      agg_item_charsets(coll, fname, &args[2], 2, flags, 3)
-  */
   bool agg_arg_charsets(DTCollation &c, Item **items, uint nitems,
                         uint flags, int item_sep)
   {
-    if (agg_item_collations(c, func_name(), items, nitems, flags, item_sep))
+    return Type_std_attributes::agg_arg_charsets(c, func_name(),
-      return true;
+                                                 items, nitems,
-
-    return agg_item_set_converter(c, func_name(), items, nitems,
                                                  flags, item_sep);
   }
-  /*
-    Aggregate arguments for string result, e.g: CONCAT(a,b)
-    - convert to @@character_set_connection if all arguments are numbers
-    - allow DERIVATION_NONE
-  */
   bool agg_arg_charsets_for_string_result(DTCollation &c,
                                           Item **items, uint nitems,
                                           int item_sep= 1)
   {
-    uint flags= MY_COLL_ALLOW_SUPERSET_CONV |
+    return Type_std_attributes::
-                MY_COLL_ALLOW_COERCIBLE_CONV |
+      agg_arg_charsets_for_string_result(c, func_name(),
-                MY_COLL_ALLOW_NUMERIC_CONV;
+                                         items, nitems, item_sep);
-    return agg_arg_charsets(c, items, nitems, flags, item_sep);
   }
-  /*
-    Aggregate arguments for string result, when some comparison
-    is involved internally, e.g: REPLACE(a,b,c)
-    - convert to @@character_set_connection if all arguments are numbers
-    - disallow DERIVATION_NONE
-  */
   bool agg_arg_charsets_for_string_result_with_comparison(DTCollation &c,
                                                           Item **items,
                                                           uint nitems,
                                                           int item_sep= 1)
   {
-    uint flags= MY_COLL_ALLOW_SUPERSET_CONV |
+    return Type_std_attributes::
-                MY_COLL_ALLOW_COERCIBLE_CONV |
+      agg_arg_charsets_for_string_result_with_comparison(c, func_name(),
-                MY_COLL_ALLOW_NUMERIC_CONV |
+                                                         items, nitems,
-                MY_COLL_DISALLOW_NONE;
+                                                         item_sep);
-    return agg_arg_charsets(c, items, nitems, flags, item_sep);
   }
 
   /*
@@ -4153,13 +4099,10 @@ protected:
                                        Item **items, uint nitems,
                                        int item_sep= 1)
   {
-    uint flags= MY_COLL_ALLOW_SUPERSET_CONV |
+    return Type_std_attributes::
-                MY_COLL_ALLOW_COERCIBLE_CONV |
+      agg_arg_charsets_for_comparison(c, func_name(), items, nitems, item_sep);
-                MY_COLL_DISALLOW_NONE;
-    return agg_arg_charsets(c, items, nitems, flags, item_sep);
   }
 
-
 public:
   // This method is used by Arg_comparator
   bool agg_arg_charsets_for_comparison(CHARSET_INFO **cs, Item **a, Item **b)
@@ -5879,11 +5822,12 @@ public:
   Item_type_holder(THD*, Item*);
 
   const Type_handler *type_handler() const
-  { return Type_handler_hybrid_field_type::type_handler(); }
+  {
+    const Type_handler *handler= Type_handler_hybrid_field_type::type_handler();
+    return handler->type_handler_for_item_field();
+  }
   enum_field_types field_type() const
   { return Type_handler_hybrid_field_type::field_type(); }
-  enum_field_types real_field_type() const
-  { return Type_handler_hybrid_field_type::real_field_type(); }
   enum Item_result result_type () const
   {
     /*
@@ -5902,16 +5846,22 @@ public:
   }
   const Type_handler *real_type_handler() const
   {
-    return Item_type_holder::type_handler();
+    return Type_handler_hybrid_field_type::type_handler();
   }
 
   enum Type type() const { return TYPE_HOLDER; }
+  TYPELIB *get_typelib() const { return enum_set_typelib; }
   double val_real();
   longlong val_int();
   my_decimal *val_decimal(my_decimal *);
   String *val_str(String*);
   bool join_types(THD *thd, Item *);
-  Field *make_field_by_type(TABLE *table);
+  Field *create_tmp_field(bool group, TABLE *table)
+  {
+    return Item_type_holder::real_type_handler()->
+           make_and_init_table_field(&name, Record_addr(maybe_null),
+                                     *this, table);
+  }
   Field::geometry_type get_geometry_type() const { return geometry_type; };
   Item* get_copy(THD *thd, MEM_ROOT *mem_root) { return 0; }
 };

sql/item_cmpfunc.cc

@@ -2577,7 +2577,7 @@ Item_func_nullif::fix_length_and_dec()
     thd->change_item_tree(&args[0], m_cache);
     thd->change_item_tree(&args[2], m_cache);
   }
-  set_handler_by_field_type(args[2]->field_type());
+  set_handler(args[2]->type_handler());
   collation.set(args[2]->collation);
   decimals= args[2]->decimals;
   unsigned_flag= args[2]->unsigned_flag;

sql/item_cmpfunc.h

@@ -1057,7 +1057,7 @@ public:
   }
   const char *func_name() const { return "ifnull"; }
   Field *create_field_for_create_select(TABLE *table)
-  { return tmp_table_field_from_field_type(table, false, false); }
+  { return tmp_table_field_from_field_type(table); }
 
   table_map not_null_tables() const { return 0; }
   uint decimal_precision() const

sql/item_func.cc

@@ -592,99 +592,6 @@ void Item_udf_func::fix_num_length_and_dec()
 }
 
 
-/**
-  Set max_length/decimals of function if function is fixed point and
-  result length/precision depends on argument ones.
-*/
-
-void Item_func::count_decimal_length(Item **item, uint nitems)
-{
-  int max_int_part= 0;
-  decimals= 0;
-  unsigned_flag= 1;
-  for (uint i=0 ; i < nitems ; i++)
-  {
-    set_if_bigger(decimals, item[i]->decimals);
-    set_if_bigger(max_int_part, item[i]->decimal_int_part());
-    set_if_smaller(unsigned_flag, item[i]->unsigned_flag);
-  }
-  int precision= MY_MIN(max_int_part + decimals, DECIMAL_MAX_PRECISION);
-  fix_char_length(my_decimal_precision_to_length_no_truncation(precision,
-                                                               decimals,
-                                                               unsigned_flag));
-}
-
-
-/**
-  Set max_length of if it is maximum length of its arguments.
-*/
-
-void Item_func::count_only_length(Item **item, uint nitems)
-{
-  uint32 char_length= 0;
-  unsigned_flag= 0;
-  for (uint i= 0; i < nitems ; i++)
-  {
-    set_if_bigger(char_length, item[i]->max_char_length());
-    set_if_bigger(unsigned_flag, item[i]->unsigned_flag);
-  }
-  fix_char_length(char_length);
-}
-
-
-/**
-  Set max_length/decimals of function if function is floating point and
-  result length/precision depends on argument ones.
-*/
-
-void Item_func::count_real_length(Item **items, uint nitems)
-{
-  uint32 length= 0;
-  decimals= 0;
-  max_length= 0;
-  unsigned_flag= false;
-  for (uint i=0 ; i < nitems ; i++)
-  {
-    if (decimals < FLOATING_POINT_DECIMALS)
-    {
-      set_if_bigger(decimals, items[i]->decimals);
-      /* Will be ignored if items[i]->decimals >= FLOATING_POINT_DECIMALS */
-      set_if_bigger(length, (items[i]->max_length - items[i]->decimals));
-    }
-    set_if_bigger(max_length, items[i]->max_length);
-  }
-  if (decimals < FLOATING_POINT_DECIMALS)
-  {
-    max_length= length;
-    length+= decimals;
-    if (length < max_length)  // If previous operation gave overflow
-      max_length= UINT_MAX32;
-    else
-      max_length= length;
-  }
-}
-
-
-/**
-  Calculate max_length and decimals for string functions.
-
-  @param field_type  Field type.
-  @param items       Argument array.
-  @param nitems      Number of arguments.
-
-  @retval            False on success, true on error.
-*/
-bool Item_func::count_string_length(Item **items, uint nitems)
-{
-  DBUG_ASSERT(!is_temporal_type(field_type()));
-  if (agg_arg_charsets_for_string_result(collation, items, nitems, 1))
-    return true;
-  count_only_length(items, nitems);
-  decimals= max_length ? NOT_FIXED_DEC : 0;
-  return false;
-}
-
-
 void Item_func::signal_divide_by_null()
 {
   THD *thd= current_thd;
@@ -890,7 +797,7 @@ String *Item_func_hybrid_field_type::val_str_from_date_op(String *str)
   if (date_op_with_null_check(&ltime) ||
       (null_value= str->alloc(MAX_DATE_STRING_REP_LENGTH)))
     return (String *) 0;
-  ltime.time_type= mysql_type_to_time_type(field_type());
+  ltime.time_type= mysql_timestamp_type();
   str->length(my_TIME_to_str(&ltime, const_cast<char*>(str->ptr()), decimals));
   str->set_charset(&my_charset_bin);
   DBUG_ASSERT(!null_value);
@@ -902,7 +809,7 @@ double Item_func_hybrid_field_type::val_real_from_date_op()
   MYSQL_TIME ltime;
   if (date_op_with_null_check(&ltime))
     return 0;
-  ltime.time_type= mysql_type_to_time_type(field_type());
+  ltime.time_type= mysql_timestamp_type();
   return TIME_to_double(&ltime);
 }
 
@@ -911,7 +818,7 @@ longlong Item_func_hybrid_field_type::val_int_from_date_op()
   MYSQL_TIME ltime;
   if (date_op_with_null_check(&ltime))
     return 0;
-  ltime.time_type= mysql_type_to_time_type(field_type());
+  ltime.time_type= mysql_timestamp_type();
   return TIME_to_ulonglong(&ltime);
 }
 
@@ -924,7 +831,7 @@ Item_func_hybrid_field_type::val_decimal_from_date_op(my_decimal *dec)
     my_decimal_set_zero(dec);
     return 0;
   }
-  ltime.time_type= mysql_type_to_time_type(field_type());
+  ltime.time_type= mysql_timestamp_type();
   return date2my_decimal(&ltime, dec);
 }
 
@@ -2255,8 +2162,8 @@ void Item_func_int_val::fix_length_and_dec_int_or_decimal()
 {
   ulonglong tmp_max_length= (ulonglong ) args[0]->max_length - 
     (args[0]->decimals ? args[0]->decimals + 1 : 0) + 2;
-  max_length= tmp_max_length > (ulonglong) 4294967295U ?
+  max_length= tmp_max_length > (ulonglong) UINT_MAX32 ?
-    (uint32) 4294967295U : (uint32) tmp_max_length;
+    (uint32) UINT_MAX32 : (uint32) tmp_max_length;
   uint tmp= float_length(decimals);
   set_if_smaller(max_length,tmp);
   decimals= 0;

sql/item_func.h

@@ -42,44 +42,8 @@ protected:
   uint allowed_arg_cols;
   String *val_str_from_val_str_ascii(String *str, String *str2);
 
-  void count_only_length(Item **item, uint nitems);
-  void count_real_length(Item **item, uint nitems);
-  void count_decimal_length(Item **item, uint nitems);
-  bool count_string_length(Item **item, uint nitems);
-  uint count_max_decimals(Item **item, uint nitems)
-  {
-    uint res= 0;
-    for (uint i= 0; i < nitems; i++)
-      set_if_bigger(res, item[i]->decimals);
-    return res;
-  }
   virtual bool check_allowed_arg_cols(uint argno);
 public:
-  void aggregate_attributes_int(Item **items, uint nitems)
-  {
-    collation.set_numeric();
-    count_only_length(items, nitems);
-    decimals= 0;
-  }
-  void aggregate_attributes_real(Item **items, uint nitems)
-  {
-    collation.set_numeric();
-    count_real_length(items, nitems);
-  }
-  void aggregate_attributes_decimal(Item **items, uint nitems)
-  {
-    collation.set_numeric();
-    count_decimal_length(items, nitems);
-  }
-  bool aggregate_attributes_string(Item **item, uint nitems)
-  {
-    return count_string_length(item, nitems);
-  }
-  void aggregate_attributes_temporal(uint int_part_length,
-                                     Item **item, uint nitems)
-  {
-    fix_attributes_temporal(int_part_length, count_max_decimals(item, nitems));
-  }
 
   table_map not_null_tables_cache;
 
@@ -208,7 +172,7 @@ public:
   {
     return result_type() != STRING_RESULT ?
            create_tmp_field(false, table, MY_INT32_NUM_DECIMAL_DIGITS) :
-           tmp_table_field_from_field_type(table, false, false);
+           tmp_table_field_from_field_type(table);
   }
   Item *get_tmp_table_item(THD *thd);
 
@@ -2255,12 +2219,6 @@ public:
   bool update();
   bool fix_fields(THD *thd, Item **ref);
   void fix_length_and_dec();
-  Field *create_field_for_create_select(TABLE *table)
-  {
-    return result_type() != STRING_RESULT ?
-           create_tmp_field(false, table, MY_INT32_NUM_DECIMAL_DIGITS) :
-           tmp_table_field_from_field_type(table, false, true);
-  }
   table_map used_tables() const
   {
     return used_tables_cache | RAND_TABLE_BIT;
@@ -2302,6 +2260,14 @@ public:
   my_decimal *val_decimal(my_decimal*);
   String *val_str(String* str);
   void fix_length_and_dec();
+  Field *create_field_for_create_select(TABLE *table)
+  {
+    return cmp_type() == STRING_RESULT ?
+      type_handler_long_blob.make_and_init_table_field(&(Item::name),
+                                                       Record_addr(maybe_null),
+                                                       *this, table) :
+      create_tmp_field(false, table, MY_INT32_NUM_DECIMAL_DIGITS);
+  }
   virtual void print(String *str, enum_query_type query_type);
   /*
     We must always return variables as strings to guard against selects of type
@@ -2655,7 +2621,7 @@ public:
   {
     return result_type() != STRING_RESULT ?
            sp_result_field :
-           tmp_table_field_from_field_type(table, false, false);
+           tmp_table_field_from_field_type(table);
   }
   void make_field(THD *thd, Send_field *tmp_field);
 

sql/item_geofunc.cc

@@ -40,20 +40,11 @@
 #include "opt_range.h"
 
 
-Field *Item_geometry_func::create_field_for_create_select(TABLE *t_arg)
-{
-  Field *result;
-  if ((result= new Field_geom(max_length, maybe_null, &name, t_arg->s,
-                              get_geometry_type())))
-    result->init(t_arg);
-  return result;
-}
-
 void Item_geometry_func::fix_length_and_dec()
 {
   collation.set(&my_charset_bin);
   decimals=0;
-  max_length= (uint32) 4294967295U;
+  max_length= (uint32) UINT_MAX32;
   maybe_null= 1;
 }
 
@@ -206,7 +197,7 @@ String *Item_func_as_wkt::val_str_ascii(String *str)
 void Item_func_as_wkt::fix_length_and_dec()
 {
   collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
-  max_length=MAX_BLOB_WIDTH;
+  max_length= (uint32) UINT_MAX32;
   maybe_null= 1;
 }
 

sql/item_geofunc.h

@@ -40,7 +40,6 @@ public:
   Item_geometry_func(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
   void fix_length_and_dec();
   enum_field_types field_type() const  { return MYSQL_TYPE_GEOMETRY; }
-  Field *create_field_for_create_select(TABLE *table);
 };
 
 class Item_func_geometry_from_text: public Item_geometry_func
@@ -101,7 +100,7 @@ public:
   Item_func_as_wkb(THD *thd, Item *a): Item_geometry_func(thd, a) {}
   const char *func_name() const { return "st_aswkb"; }
   String *val_str(String *);
-  enum_field_types field_type() const  { return MYSQL_TYPE_BLOB; }
+  enum_field_types field_type() const  { return MYSQL_TYPE_LONG_BLOB; }
   Item *get_copy(THD *thd, MEM_ROOT *mem_root)
   { return get_item_copy<Item_func_as_wkb>(thd, mem_root, this); }
 };

sql/item_strfunc.h

@@ -1074,7 +1074,7 @@ public:
   }
   void fix_length_and_dec()
   {
-    collation.set(default_charset());
+    collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
     decimals=0;
     fix_char_length(args[0]->max_length * 2);
     m_arg0_type_handler= args[0]->type_handler();

sql/item_sum.cc

@@ -1202,51 +1202,15 @@ void Item_sum_hybrid::setup_hybrid(THD *thd, Item *item, Item *value_arg)
 
 Field *Item_sum_hybrid::create_tmp_field(bool group, TABLE *table)
 {
-  Field *field;
-  MEM_ROOT *mem_root;
-
   if (args[0]->type() == Item::FIELD_ITEM)
   {
-    field= ((Item_field*) args[0])->field;
+    Field *field= ((Item_field*) args[0])->field;
     if ((field= create_tmp_field_from_field(table->in_use, field, &name,
                                             table, NULL)))
       field->flags&= ~NOT_NULL_FLAG;
     return field;
   }
-
-  /*
-    DATE/TIME fields have STRING_RESULT result types.
-    In order to preserve field type, it's needed to handle DATE/TIME
-    fields creations separately.
-  */
-  mem_root= table->in_use->mem_root;
-  switch (args[0]->field_type()) {
-  case MYSQL_TYPE_DATE:
-  {
-    field= new (mem_root)
-      Field_newdate(0, maybe_null ? (uchar*)"" : 0, 0, Field::NONE,
-                    &name);
-    break;
-  }
-  case MYSQL_TYPE_TIME:
-  {
-    field= new_Field_time(mem_root, 0, maybe_null ? (uchar*)"" : 0, 0,
-                          Field::NONE, &name, decimals);
-    break;
-  }
-  case MYSQL_TYPE_TIMESTAMP:
-  case MYSQL_TYPE_DATETIME:
-  {
-    field= new_Field_datetime(mem_root, 0, maybe_null ? (uchar*)"" : 0, 0,
-                              Field::NONE, &name, decimals);
-    break;
-  }
-  default:
   return Item_sum::create_tmp_field(group, table);
-  }
-  if (field)
-    field->init(table);
-  return field;
 }
 
 
@@ -1669,8 +1633,6 @@ Item *Item_sum_avg::copy_or_same(THD* thd)
 
 Field *Item_sum_avg::create_tmp_field(bool group, TABLE *table)
 {
-  Field *field;
-  MEM_ROOT *mem_root= table->in_use->mem_root;
 
   if (group)
   {
@@ -1679,21 +1641,15 @@ Field *Item_sum_avg::create_tmp_field(bool group, TABLE *table)
       The easiest way is to do this is to store both value in a string
       and unpack on access.
     */
-    field= new (mem_root)
+    Field *field= new (table->in_use->mem_root)
       Field_string(((Item_sum_avg::result_type() == DECIMAL_RESULT) ?
                    dec_bin_size : sizeof(double)) + sizeof(longlong),
                    0, &name, &my_charset_bin);
-  }
-  else if (Item_sum_avg::result_type() == DECIMAL_RESULT)
-    field= Field_new_decimal::create_from_item(mem_root, this);
-  else
-  {
-    field= new (mem_root) Field_double(max_length, maybe_null, &name,
-                                       decimals, TRUE);
-  }
     if (field)
       field->init(table);
     return field;
+  }
+  return tmp_table_field_from_field_type(table);
 }
 
 
@@ -3362,24 +3318,6 @@ void Item_func_group_concat::cleanup()
 }
 
 
-Field *Item_func_group_concat::make_string_field(TABLE *table_arg)
-{
-  Field *field;
-  DBUG_ASSERT(collation.collation);
-
-  if (too_big_for_varchar())
-    field= new Field_blob(max_length,
-                          maybe_null, &name, collation.collation, TRUE);
-  else
-    field= new Field_varstring(max_length,
-                               maybe_null, &name, table_arg->s, collation.collation);
-
-  if (field)
-    field->init(table_arg);
-  return field;
-}
-
-
 Item *Item_func_group_concat::copy_or_same(THD* thd)
 {
   return new (thd->mem_root) Item_func_group_concat(thd, this);

sql/item_sum.h

@@ -1636,9 +1636,6 @@ class Item_func_group_concat : public Item_sum
   friend int dump_leaf_key(void* key_arg,
                            element_count count __attribute__((unused)),
 			   void* item_arg);
-protected:
-  virtual Field *make_string_field(TABLE *table);
-
 public:
   Item_func_group_concat(THD *thd, Name_resolution_context *context_arg,
                          bool is_distinct, List<Item> *is_select,

sql/item_timefunc.cc

@@ -1532,7 +1532,7 @@ String *Item_temporal_hybrid_func::val_str_ascii(String *str)
   /* Check that the returned timestamp type matches to the function type */
   DBUG_ASSERT(field_type() == MYSQL_TYPE_STRING ||
               ltime.time_type == MYSQL_TIMESTAMP_NONE ||
-              mysql_type_to_time_type(field_type()) == ltime.time_type);
+              ltime.time_type == mysql_timestamp_type());
   return str;
 }
 
@@ -3226,7 +3226,7 @@ void Item_func_str_to_date::fix_length_and_dec()
       }
     }
   }
-  cached_timestamp_type= mysql_type_to_time_type(field_type());
+  cached_timestamp_type= mysql_timestamp_type();
 }
 
 

sql/item_timefunc.h

@@ -536,7 +536,7 @@ public:
   my_decimal *val_decimal(my_decimal *decimal_value)
   { return  val_decimal_from_date(decimal_value); }
   Field *create_field_for_create_select(TABLE *table)
-  { return tmp_table_field_from_field_type(table, false, false); }
+  { return tmp_table_field_from_field_type(table); }
   int save_in_field(Field *field, bool no_conversions)
   { return save_date_in_field(field, no_conversions); }
 };
@@ -1018,7 +1018,7 @@ class Item_extract :public Item_int_func
     return true;
   }
   Field *create_field_for_create_select(TABLE *table)
-  { return tmp_table_field_from_field_type(table, false, false); }
+  { return tmp_table_field_from_field_type(table); }
 
   Item *get_copy(THD *thd, MEM_ROOT *mem_root)
   { return get_item_copy<Item_extract>(thd, mem_root, this); }

sql/opt_range.cc

@@ -7926,7 +7926,9 @@ Item_func_like::get_mm_leaf(RANGE_OPT_PARAM *param,
   if (!(res= value->val_str(&tmp)))
     DBUG_RETURN(&null_element);
 
-  if (field->cmp_type() != STRING_RESULT)
+  if (field->cmp_type() != STRING_RESULT ||
+      field->type_handler() == &type_handler_enum ||
+      field->type_handler() == &type_handler_set)
     DBUG_RETURN(0);
 
   /*
@@ -8022,6 +8024,19 @@ Item_bool_func::get_mm_leaf(RANGE_OPT_PARAM *param,
     goto end;
 
   err= value->save_in_field_no_warnings(field, 1);
+  if (err > 0)
+  {
+    if (field->type_handler() == &type_handler_enum ||
+        field->type_handler() == &type_handler_set)
+    {
+      if (type == EQ_FUNC || type == EQUAL_FUNC)
+      {
+        tree= new (alloc) SEL_ARG(field, 0, 0);
+        tree->type= SEL_ARG::IMPOSSIBLE;
+      }
+      goto end;
+    }
+
     if (err == 2 && field->cmp_type() == STRING_RESULT)
     {
       if (type == EQ_FUNC || type == EQUAL_FUNC)
@@ -8033,8 +8048,7 @@ Item_bool_func::get_mm_leaf(RANGE_OPT_PARAM *param,
         tree= NULL; /*  Cannot infer anything */
       goto end;
     }
-  if (err > 0)
+
-  {
     if (field->cmp_type() != value->result_type())
     {
       if ((type == EQ_FUNC || type == EQUAL_FUNC) &&

sql/opt_subselect.cc

@@ -843,34 +843,9 @@ bool subquery_types_allow_materialization(Item_in_subselect *in_subs)
     all_are_fields &= (outer->real_item()->type() == Item::FIELD_ITEM && 
                        inner->real_item()->type() == Item::FIELD_ITEM);
     total_key_length += inner->max_length;
-    if (outer->cmp_type() != inner->cmp_type())
+    if (!inner->type_handler()->subquery_type_allows_materialization(inner,
+                                                                     outer))
       DBUG_RETURN(FALSE);
-    switch (outer->cmp_type()) {
-    case STRING_RESULT:
-      if (!(outer->collation.collation == inner->collation.collation))
-        DBUG_RETURN(FALSE);
-      // Materialization does not work with BLOB columns
-      if (inner->field_type() == MYSQL_TYPE_BLOB || 
-          inner->field_type() == MYSQL_TYPE_GEOMETRY)
-        DBUG_RETURN(FALSE);
-      /* 
-        Materialization also is unable to work when create_tmp_table() will
-        create a blob column because item->max_length is too big.
-        The following check is copied from Item::make_string_field():
-      */ 
-      if (inner->too_big_for_varchar())
-      {
-        DBUG_RETURN(FALSE);
-      }
-      break;
-    case TIME_RESULT:
-      if (mysql_type_to_time_type(outer->field_type()) !=
-          mysql_type_to_time_type(inner->field_type()))
-        DBUG_RETURN(FALSE);
-    default:
-      /* suitable for materialization */
-      break;
-    }
   }
 
   /*

sql/partition_info.cc

@@ -1922,7 +1922,7 @@ void partition_info::report_part_expr_error(bool use_subpart_expr)
         !(type == HASH_PARTITION && list_of_fields))
     {
       my_error(ER_FIELD_TYPE_NOT_ALLOWED_AS_PARTITION_FIELD, MYF(0),
-               item_field->name);
+               item_field->name.str);
       DBUG_VOID_RETURN;
     }
   }

sql/sql_class.cc

@@ -2352,6 +2352,26 @@ bool THD::convert_string(String *s, CHARSET_INFO *from_cs, CHARSET_INFO *to_cs)
 }
 
 
+Item_string *THD::make_string_literal(const char *str, size_t length,
+                                      uint repertoire)
+{
+  if (!charset_is_collation_connection &&
+      (repertoire != MY_REPERTOIRE_ASCII ||
+       !my_charset_is_ascii_based(variables.collation_connection)))
+  {
+    LEX_STRING to;
+    if (convert_string(&to, variables.collation_connection,
+                       str, length, variables.character_set_client))
+      return NULL;
+    str= to.str;
+    length= to.length;
+  }
+  return new (mem_root) Item_string(this, str, length,
+                                    variables.collation_connection,
+                                    DERIVATION_COERCIBLE, repertoire);
+}
+
+
 /*
   Update some cache variables when character set changes
 */
@@ -3114,7 +3134,7 @@ int select_export::send_data(List<Item> &items)
                             ER_TRUNCATED_WRONG_VALUE_FOR_FIELD,
                             ER_THD(thd, ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
                             "string", printable_buff,
-                            item->name, static_cast<long>(row_count));
+                            item->name.str, static_cast<long>(row_count));
       }
       else if (copier.source_end_pos() < res->ptr() + res->length())
       { 

sql/sql_class.h

@@ -3427,6 +3427,20 @@ public:
 
   bool convert_string(String *s, CHARSET_INFO *from_cs, CHARSET_INFO *to_cs);
 
+  /*
+    Create a string literal with optional client->connection conversion.
+    @param str        - the string in the client character set
+    @param length     - length of the string
+    @param repertoire - the repertoire of the string
+  */
+  Item_string *make_string_literal(const char *str, size_t length,
+                                   uint repertoire);
+  Item_string *make_string_literal(const Lex_string_with_metadata_st &str)
+  {
+    uint repertoire= str.repertoire(variables.character_set_client);
+    return make_string_literal(str.str, str.length, repertoire);
+  }
+
   void add_changed_table(TABLE *table);
   void add_changed_table(const char *key, long key_length);
   CHANGED_TABLE_LIST * changed_table_dup(const char *key, long key_length);

sql/sql_lex.h

@@ -749,6 +749,9 @@ public:
 
   /* UNION methods */
   bool prepare(THD *thd, select_result *result, ulong additional_options);
+  bool prepare_join(THD *thd, SELECT_LEX *sl, select_result *result,
+                    ulong additional_options,
+                    bool is_union_select);
   bool optimize();
   bool exec();
   bool exec_recursive();

sql/sql_select.cc

@@ -15880,22 +15880,9 @@ Field *Item::create_tmp_field(bool group, TABLE *table, uint convert_int_length)
     break;
   }
   case TIME_RESULT:
-    new_field= tmp_table_field_from_field_type(table, true, false);
-    break;
-  case STRING_RESULT:
-    DBUG_ASSERT(collation.collation);
-    /*
-      GEOMETRY fields have STRING_RESULT result type.
-      To preserve type they needed to be handled separately.
-    */
-    if (field_type() == MYSQL_TYPE_GEOMETRY)
-      new_field= tmp_table_field_from_field_type(table, true, false);
-    else
-      new_field= make_string_field(table);
-    new_field->set_derivation(collation.derivation, collation.repertoire);
-    break;
   case DECIMAL_RESULT:
-    new_field= Field_new_decimal::create_from_item(mem_root, this);
+  case STRING_RESULT:
+    new_field= tmp_table_field_from_field_type(table);
     break;
   case ROW_RESULT:
     // This case should never be choosen
@@ -15981,7 +15968,7 @@ Field *Item::create_field_for_schema(THD *thd, TABLE *table)
       field->init(table);
     return field;
   }
-  return tmp_table_field_from_field_type(table, false, false);
+  return tmp_table_field_from_field_type(table);
 }
 
 
@@ -16032,6 +16019,7 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
   }
 
   switch (type) {
+  case Item::TYPE_HOLDER:
   case Item::SUM_FUNC_ITEM:
   {
     result= item->create_tmp_field(group, table);
@@ -16161,11 +16149,6 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
     return create_tmp_field_from_item(thd, item, table,
                                       (make_copy_field ? 0 : copy_func),
                                        modify_item);
-  case Item::TYPE_HOLDER:  
-    result= ((Item_type_holder *)item)->make_field_by_type(table);
-    result->set_derivation(item->collation.derivation,
-                           item->collation.repertoire);
-    return result;
   default:					// Dosen't have to be stored
     return 0;
   }

sql/sql_show.cc

@@ -5439,7 +5439,7 @@ static void store_column_type(TABLE *table, Field *field, CHARSET_INFO *cs,
       field->real_type() == MYSQL_TYPE_STRING)     // For binary type
   {
     uint32 octet_max_length= field->max_display_length();
-    if (is_blob && octet_max_length != (uint32) 4294967295U)
+    if (is_blob && octet_max_length != (uint32) UINT_MAX32)
       octet_max_length /= field->charset()->mbmaxlen;
     longlong char_max_len= is_blob ? 
       (longlong) octet_max_length / field->charset()->mbminlen :

sql/sql_table.cc

@@ -7368,7 +7368,7 @@ blob_length_by_type(enum_field_types type)
   case MYSQL_TYPE_MEDIUM_BLOB:
     return 16777215;
   case MYSQL_TYPE_LONG_BLOB:
-    return 4294967295U;
+    return (uint) UINT_MAX32;
   default:
     DBUG_ASSERT(0); // we should never go here
     return 0;

sql/sql_type.cc

@@ -21,39 +21,44 @@
 #include "item.h"
 #include "log.h"
 
-static Type_handler_tiny        type_handler_tiny;
+Type_handler_row         type_handler_row;
-static Type_handler_short       type_handler_short;
-static Type_handler_long        type_handler_long;
-static Type_handler_int24       type_handler_int24;
-static Type_handler_year        type_handler_year;
-static Type_handler_time        type_handler_time;
-static Type_handler_date        type_handler_date;
-static Type_handler_timestamp   type_handler_timestamp;
-static Type_handler_timestamp2  type_handler_timestamp2;
-static Type_handler_olddecimal  type_handler_olddecimal;
-static Type_handler_tiny_blob   type_handler_tiny_blob;
-static Type_handler_medium_blob type_handler_medium_blob;
-static Type_handler_long_blob   type_handler_long_blob;
-static Type_handler_blob        type_handler_blob;
-
 
 Type_handler_null        type_handler_null;
-Type_handler_row         type_handler_row;
+
-Type_handler_string      type_handler_string;
+Type_handler_tiny        type_handler_tiny;
-Type_handler_varchar     type_handler_varchar;
+Type_handler_short       type_handler_short;
+Type_handler_long        type_handler_long;
+Type_handler_int24       type_handler_int24;
 Type_handler_longlong    type_handler_longlong;
 Type_handler_float       type_handler_float;
 Type_handler_double      type_handler_double;
-Type_handler_newdecimal  type_handler_newdecimal;
-Type_handler_datetime    type_handler_datetime;
 Type_handler_bit         type_handler_bit;
-Type_handler_enum        type_handler_enum;
-Type_handler_set         type_handler_set;
 
+Type_handler_olddecimal  type_handler_olddecimal;
+Type_handler_newdecimal  type_handler_newdecimal;
+
+Type_handler_year        type_handler_year;
+Type_handler_time        type_handler_time;
+Type_handler_date        type_handler_date;
+Type_handler_timestamp   type_handler_timestamp;
+Type_handler_timestamp2  type_handler_timestamp2;
+Type_handler_datetime    type_handler_datetime;
 Type_handler_time2       type_handler_time2;
 Type_handler_newdate     type_handler_newdate;
 Type_handler_datetime2   type_handler_datetime2;
 
+Type_handler_enum        type_handler_enum;
+Type_handler_set         type_handler_set;
+
+Type_handler_string      type_handler_string;
+Type_handler_var_string  type_handler_var_string;
+Type_handler_varchar     type_handler_varchar;
+
+Type_handler_tiny_blob   type_handler_tiny_blob;
+Type_handler_medium_blob type_handler_medium_blob;
+Type_handler_long_blob   type_handler_long_blob;
+Type_handler_blob        type_handler_blob;
+
 #ifdef HAVE_SPATIAL
 Type_handler_geometry    type_handler_geometry;
 #endif
@@ -80,9 +85,18 @@ bool Type_handler_data::init()
     m_type_aggregator_for_result.add(&type_handler_geometry,
                                      &type_handler_geometry,
                                      &type_handler_geometry) ||
+    m_type_aggregator_for_result.add(&type_handler_geometry,
+                                     &type_handler_tiny_blob,
+                                     &type_handler_long_blob) ||
     m_type_aggregator_for_result.add(&type_handler_geometry,
                                      &type_handler_blob,
                                      &type_handler_long_blob) ||
+    m_type_aggregator_for_result.add(&type_handler_geometry,
+                                     &type_handler_medium_blob,
+                                     &type_handler_long_blob) ||
+    m_type_aggregator_for_result.add(&type_handler_geometry,
+                                     &type_handler_long_blob,
+                                     &type_handler_long_blob) ||
     m_type_aggregator_for_result.add(&type_handler_geometry,
                                      &type_handler_varchar,
                                      &type_handler_long_blob) ||
@@ -115,6 +129,126 @@ void Type_std_attributes::set(const Field *field)
 }
 
 
+uint Type_std_attributes::count_max_decimals(Item **item, uint nitems)
+{
+  uint res= 0;
+  for (uint i= 0; i < nitems; i++)
+    set_if_bigger(res, item[i]->decimals);
+  return res;
+}
+
+
+/**
+  Set max_length/decimals of function if function is fixed point and
+  result length/precision depends on argument ones.
+*/
+
+void Type_std_attributes::count_decimal_length(Item **item, uint nitems)
+{
+  int max_int_part= 0;
+  decimals= 0;
+  unsigned_flag= 1;
+  for (uint i=0 ; i < nitems ; i++)
+  {
+    set_if_bigger(decimals, item[i]->decimals);
+    set_if_bigger(max_int_part, item[i]->decimal_int_part());
+    set_if_smaller(unsigned_flag, item[i]->unsigned_flag);
+  }
+  int precision= MY_MIN(max_int_part + decimals, DECIMAL_MAX_PRECISION);
+  fix_char_length(my_decimal_precision_to_length_no_truncation(precision,
+                                                               decimals,
+                                                               unsigned_flag));
+}
+
+
+/**
+  Set max_length of if it is maximum length of its arguments.
+*/
+
+void Type_std_attributes::count_only_length(Item **item, uint nitems)
+{
+  uint32 char_length= 0;
+  unsigned_flag= 0;
+  for (uint i= 0; i < nitems ; i++)
+  {
+    set_if_bigger(char_length, item[i]->max_char_length());
+    set_if_bigger(unsigned_flag, item[i]->unsigned_flag);
+  }
+  fix_char_length(char_length);
+}
+
+
+void Type_std_attributes::count_octet_length(Item **item, uint nitems)
+{
+  max_length= 0;
+  unsigned_flag= 0;
+  for (uint i= 0; i < nitems ; i++)
+  {
+    set_if_bigger(max_length, item[i]->max_length);
+    set_if_bigger(unsigned_flag, item[i]->unsigned_flag);
+  }
+}
+
+
+/**
+  Set max_length/decimals of function if function is floating point and
+  result length/precision depends on argument ones.
+*/
+
+void Type_std_attributes::count_real_length(Item **items, uint nitems)
+{
+  uint32 length= 0;
+  decimals= 0;
+  max_length= 0;
+  unsigned_flag= false;
+  for (uint i=0 ; i < nitems ; i++)
+  {
+    if (decimals < FLOATING_POINT_DECIMALS)
+    {
+      set_if_bigger(decimals, items[i]->decimals);
+      /* Will be ignored if items[i]->decimals >= FLOATING_POINT_DECIMALS */
+      set_if_bigger(length, (items[i]->max_length - items[i]->decimals));
+    }
+    set_if_bigger(max_length, items[i]->max_length);
+  }
+  if (decimals < FLOATING_POINT_DECIMALS)
+  {
+    max_length= length;
+    length+= decimals;
+    if (length < max_length)  // If previous operation gave overflow
+      max_length= UINT_MAX32;
+    else
+      max_length= length;
+  }
+  // Corner case: COALESCE(DOUBLE(255,4), DOUBLE(255,3)) -> FLOAT(255, 4)
+  set_if_smaller(max_length, MAX_FIELD_CHARLENGTH);
+}
+
+
+/**
+  Calculate max_length and decimals for string functions.
+
+  @param field_type  Field type.
+  @param items       Argument array.
+  @param nitems      Number of arguments.
+
+  @retval            False on success, true on error.
+*/
+bool Type_std_attributes::count_string_length(const char *func_name,
+                                              Item **items, uint nitems)
+{
+  if (agg_arg_charsets_for_string_result(collation, func_name,
+                                         items, nitems, 1))
+    return true;
+  if (collation.collation == &my_charset_bin)
+    count_octet_length(items, nitems);
+  else
+    count_only_length(items, nitems);
+  decimals= max_length ? NOT_FIXED_DEC : 0;
+  return false;
+}
+
+
 /**
   This method is used by:
   - Item_user_var_as_out_param::field_type()
@@ -140,6 +274,36 @@ Type_handler::string_type_handler(uint max_octet_length)
 }
 
 
+const Type_handler *
+Type_handler::varstring_type_handler(const Item *item)
+{
+  if (!item->max_length)
+    return &type_handler_string;
+  if (item->too_big_for_varchar())
+    return blob_type_handler(item->max_length);
+  return &type_handler_varchar;
+}
+
+
+const Type_handler *
+Type_handler::blob_type_handler(uint max_octet_length)
+{
+  if (max_octet_length <= 255)
+    return &type_handler_tiny_blob;
+  if (max_octet_length <= 65535)
+    return &type_handler_blob;
+  if (max_octet_length <= 16777215)
+    return &type_handler_medium_blob;
+  return &type_handler_long_blob;
+}
+
+
+const Type_handler *
+Type_handler::blob_type_handler(const Item *item)
+{
+  return blob_type_handler(item->max_length);
+}
+
 /**
   This method is used by:
   - Item_sum_hybrid, e.g. MAX(item), MIN(item).
@@ -222,6 +386,7 @@ const Name Type_handler_null::m_name_null(C_STRING_WITH_LEN("null"));
 
 const Name
   Type_handler_string::m_name_char(C_STRING_WITH_LEN("char")),
+  Type_handler_var_string::m_name_var_string(C_STRING_WITH_LEN("varchar")),
   Type_handler_varchar::m_name_varchar(C_STRING_WITH_LEN("varchar")),
   Type_handler_tiny_blob::m_name_tinyblob(C_STRING_WITH_LEN("tinyblob")),
   Type_handler_medium_blob::m_name_mediumblob(C_STRING_WITH_LEN("mediumblob")),
@@ -303,6 +468,30 @@ const Type_handler *Type_handler_row::type_handler_for_comparison() const
   return &type_handler_row;
 }
 
+/***************************************************************************/
+
+const Type_handler *Type_handler_enum::type_handler_for_item_field() const
+{
+  return &type_handler_string;
+}
+
+
+const Type_handler *Type_handler_enum::cast_to_int_type_handler() const
+{
+  return &type_handler_longlong;
+}
+
+
+const Type_handler *Type_handler_set::type_handler_for_item_field() const
+{
+  return &type_handler_string;
+}
+
+
+const Type_handler *Type_handler_set::cast_to_int_type_handler() const
+{
+  return &type_handler_longlong;
+}
 
 /***************************************************************************/
 
@@ -1152,6 +1341,446 @@ Field *Type_handler_set::make_conversion_table_field(TABLE *table,
                    ((const Field_enum*) target)->typelib, target->charset());
 }
 
+/*************************************************************************/
+Field *Type_handler::make_and_init_table_field(const LEX_CSTRING *name,
+                                               const Record_addr &addr,
+                                               const Type_all_attributes &attr,
+                                               TABLE *table) const
+{
+  Field *field= make_table_field(name, addr, attr, table);
+  if (field)
+    field->init(table);
+  return field;
+}
+
+
+Field *Type_handler_tiny::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_tiny(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, 0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_short::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_short(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                     Field::NONE, name, 0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_int24::make_table_field(const LEX_CSTRING *name,
+                                            const Record_addr &addr,
+                                            const Type_all_attributes &attr,
+                                            TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_medium(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                      Field::NONE, name,
+                      0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_long::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_long(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, 0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_longlong::make_table_field(const LEX_CSTRING *name,
+                                               const Record_addr &addr,
+                                               const Type_all_attributes &attr,
+                                               TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_longlong(addr.ptr, attr.max_length,
+                        addr.null_ptr, addr.null_bit,
+                        Field::NONE, name,
+                        0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_float::make_table_field(const LEX_CSTRING *name,
+                                            const Record_addr &addr,
+                                            const Type_all_attributes &attr,
+                                            TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_float(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                     Field::NONE, name,
+                     attr.decimals, 0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_double::make_table_field(const LEX_CSTRING *name,
+                                             const Record_addr &addr,
+                                             const Type_all_attributes &attr,
+                                             TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_double(addr.ptr, attr.max_length,
+                      addr.null_ptr, addr.null_bit,
+                      Field::NONE, name,
+                      attr.decimals, 0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *
+Type_handler_olddecimal::make_table_field(const LEX_CSTRING *name,
+                                          const Record_addr &addr,
+                                          const Type_all_attributes &attr,
+                                          TABLE *table) const
+{
+  /*
+    Currently make_table_field() is used for Item purpose only.
+    On Item level we have type_handler_newdecimal only.
+    For now we have DBUG_ASSERT(0).
+    It will be removed when we reuse Type_handler::make_table_field()
+    in make_field() in field.cc, to open old tables with old decimal.
+  */
+  DBUG_ASSERT(0);
+  return new (table->in_use->mem_root)
+         Field_decimal(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                       Field::NONE, name, attr.decimals,
+                       0/*zerofill*/,attr.unsigned_flag);
+}
+
+
+Field *
+Type_handler_newdecimal::make_table_field(const LEX_CSTRING *name,
+                                          const Record_addr &addr,
+                                          const Type_all_attributes &attr,
+                                          TABLE *table) const
+{
+  uint8 dec= attr.decimals;
+  uint8 intg= attr.decimal_precision() - dec;
+  uint32 len= attr.max_char_length();
+
+  /*
+    Trying to put too many digits overall in a DECIMAL(prec,dec)
+    will always throw a warning. We must limit dec to
+    DECIMAL_MAX_SCALE however to prevent an assert() later.
+  */
+
+  if (dec > 0)
+  {
+    signed int overflow;
+
+    dec= MY_MIN(dec, DECIMAL_MAX_SCALE);
+
+    /*
+      If the value still overflows the field with the corrected dec,
+      we'll throw out decimals rather than integers. This is still
+      bad and of course throws a truncation warning.
+      +1: for decimal point
+      */
+
+    const int required_length=
+      my_decimal_precision_to_length(intg + dec, dec, attr.unsigned_flag);
+
+    overflow= required_length - len;
+
+    if (overflow > 0)
+      dec= MY_MAX(0, dec - overflow);            // too long, discard fract
+    else
+      /* Corrected value fits. */
+      len= required_length;
+  }
+  return new (table->in_use->mem_root)
+         Field_new_decimal(addr.ptr, len, addr.null_ptr, addr.null_bit,
+                           Field::NONE, name,
+                           dec, 0/*zerofill*/, attr.unsigned_flag);
+}
+
+
+Field *Type_handler_year::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_year(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name);
+}
+
+
+Field *Type_handler_null::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_null(addr.ptr, attr.max_length,
+                    Field::NONE, name, attr.collation.collation);
+}
+
+
+Field *Type_handler_timestamp::make_table_field(const LEX_CSTRING *name,
+                                                const Record_addr &addr,
+                                                const Type_all_attributes &attr,
+                                                TABLE *table) const
+
+{
+  return new_Field_timestamp(table->in_use->mem_root,
+                             addr.ptr, addr.null_ptr, addr.null_bit,
+                             Field::NONE, name, table->s, attr.decimals);
+}
+
+
+Field *Type_handler_timestamp2::make_table_field(const LEX_CSTRING *name,
+                                                 const Record_addr &addr,
+                                                 const Type_all_attributes &attr,
+                                                 TABLE *table) const
+
+{
+  /*
+    Will be changed to "new Field_timestampf" when we reuse
+    make_table_field() for make_field() purposes in field.cc.
+  */
+  return new_Field_timestamp(table->in_use->mem_root,
+                             addr.ptr, addr.null_ptr, addr.null_bit,
+                             Field::NONE, name, table->s, attr.decimals);
+}
+
+
+Field *Type_handler_newdate::make_table_field(const LEX_CSTRING *name,
+                                              const Record_addr &addr,
+                                              const Type_all_attributes &attr,
+                                              TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_newdate(addr.ptr, addr.null_ptr, addr.null_bit,
+                       Field::NONE, name);
+}
+
+
+Field *Type_handler_date::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+
+{
+  /*
+    DBUG_ASSERT will be removed when we reuse make_table_field()
+    for make_field() in field.cc
+  */
+  DBUG_ASSERT(0);
+  return new (table->in_use->mem_root)
+         Field_date(addr.ptr, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name);
+}
+
+
+Field *Type_handler_time::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+
+{
+  return new_Field_time(table->in_use->mem_root,
+                        addr.ptr, addr.null_ptr, addr.null_bit,
+                        Field::NONE, name, attr.decimals);
+}
+
+
+Field *Type_handler_time2::make_table_field(const LEX_CSTRING *name,
+                                            const Record_addr &addr,
+                                            const Type_all_attributes &attr,
+                                            TABLE *table) const
+
+
+{
+  /*
+    Will be changed to "new Field_timef" when we reuse
+    make_table_field() for make_field() purposes in field.cc.
+  */
+  return new_Field_time(table->in_use->mem_root,
+                        addr.ptr, addr.null_ptr, addr.null_bit,
+                        Field::NONE, name, attr.decimals);
+}
+
+
+Field *Type_handler_datetime::make_table_field(const LEX_CSTRING *name,
+                                               const Record_addr &addr,
+                                               const Type_all_attributes &attr,
+                                               TABLE *table) const
+
+{
+  return new_Field_datetime(table->in_use->mem_root,
+                            addr.ptr, addr.null_ptr, addr.null_bit,
+                            Field::NONE, name, attr.decimals);
+}
+
+
+Field *Type_handler_datetime2::make_table_field(const LEX_CSTRING *name,
+                                                const Record_addr &addr,
+                                                const Type_all_attributes &attr,
+                                                TABLE *table) const
+{
+  /*
+    Will be changed to "new Field_datetimef" when we reuse
+    make_table_field() for make_field() purposes in field.cc.
+  */
+  return new_Field_datetime(table->in_use->mem_root,
+                            addr.ptr, addr.null_ptr, addr.null_bit,
+                            Field::NONE, name, attr.decimals);
+}
+
+
+Field *Type_handler_bit::make_table_field(const LEX_CSTRING *name,
+                                          const Record_addr &addr,
+                                          const Type_all_attributes &attr,
+                                          TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_bit_as_char(addr.ptr, attr.max_length,
+                           addr.null_ptr, addr.null_bit,
+                           Field::NONE, name);
+}
+
+
+Field *Type_handler_string::make_table_field(const LEX_CSTRING *name,
+                                             const Record_addr &addr,
+                                             const Type_all_attributes &attr,
+                                             TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_string(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                      Field::NONE, name, attr.collation);
+}
+
+
+Field *Type_handler_varchar::make_table_field(const LEX_CSTRING *name,
+                                              const Record_addr &addr,
+                                              const Type_all_attributes &attr,
+                                              TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_varstring(addr.ptr, attr.max_length,
+                         HA_VARCHAR_PACKLENGTH(attr.max_length),
+                         addr.null_ptr, addr.null_bit,
+                         Field::NONE, name,
+                         table->s, attr.collation);
+}
+
+
+Field *Type_handler_tiny_blob::make_table_field(const LEX_CSTRING *name,
+                                                const Record_addr &addr,
+                                                const Type_all_attributes &attr,
+                                                TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_blob(addr.ptr, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, table->s,
+                    1, attr.collation);
+}
+
+
+Field *Type_handler_blob::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_blob(addr.ptr, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, table->s,
+                    2, attr.collation);
+}
+
+
+Field *
+Type_handler_medium_blob::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_blob(addr.ptr, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, table->s,
+                    3, attr.collation);
+}
+
+
+Field *Type_handler_long_blob::make_table_field(const LEX_CSTRING *name,
+                                                const Record_addr &addr,
+                                                const Type_all_attributes &attr,
+                                                TABLE *table) const
+
+{
+  return new (table->in_use->mem_root)
+         Field_blob(addr.ptr, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, table->s,
+                    4, attr.collation);
+}
+
+
+
+#ifdef HAVE_SPATIAL
+Field *Type_handler_geometry::make_table_field(const LEX_CSTRING *name,
+                                               const Record_addr &addr,
+                                               const Type_all_attributes &attr,
+                                               TABLE *table) const
+{
+  return new (table->in_use->mem_root)
+         Field_geom(addr.ptr, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name, table->s, 4,
+                    (Field::geometry_type) attr.uint_geometry_type(),
+                    0);
+}
+#endif
+
+
+Field *Type_handler_enum::make_table_field(const LEX_CSTRING *name,
+                                           const Record_addr &addr,
+                                           const Type_all_attributes &attr,
+                                           TABLE *table) const
+{
+  TYPELIB *typelib= attr.get_typelib();
+  DBUG_ASSERT(typelib);
+  return new (table->in_use->mem_root)
+         Field_enum(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                    Field::NONE, name,
+                    get_enum_pack_length(typelib->count), typelib,
+                    attr.collation);
+}
+
+
+Field *Type_handler_set::make_table_field(const LEX_CSTRING *name,
+                                          const Record_addr &addr,
+                                          const Type_all_attributes &attr,
+                                          TABLE *table) const
+
+{
+  TYPELIB *typelib= attr.get_typelib();
+  DBUG_ASSERT(typelib);
+  return new (table->in_use->mem_root)
+         Field_set(addr.ptr, attr.max_length, addr.null_ptr, addr.null_bit,
+                   Field::NONE, name,
+                   get_enum_pack_length(typelib->count), typelib,
+                   attr.collation);
+}
+
 /*************************************************************************/
 
 uint32 Type_handler_decimal_result::max_display_length(const Item *item) const
@@ -1436,7 +2065,18 @@ bool Type_handler_string_result::
        Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
                                        Item **items, uint nitems) const
 {
-  return func->aggregate_attributes_string(items, nitems);
+  return func->aggregate_attributes_string(func->func_name(), items, nitems);
+}
+
+
+bool Type_handler_blob_common::
+       Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
+                                       Item **items, uint nitems) const
+{
+  if (func->aggregate_attributes_string(func->func_name(), items, nitems))
+    return true;
+  func->set_handler(blob_type_handler(func->max_length));
+  return false;
 }
 
 
@@ -3187,3 +3827,204 @@ uint Type_handler_string_result::Item_temporal_precision(Item *item,
 }
 
 /***************************************************************************/
+
+uint Type_handler::Item_decimal_scale(const Item *item) const
+{
+  return item->decimals < NOT_FIXED_DEC ?
+         item->decimals :
+         MY_MIN(item->max_length, DECIMAL_MAX_SCALE);
+}
+
+uint Type_handler_temporal_result::
+       Item_decimal_scale_with_seconds(const Item *item) const
+{
+  return item->decimals < NOT_FIXED_DEC ?
+         item->decimals :
+         TIME_SECOND_PART_DIGITS;
+}
+
+uint Type_handler::Item_divisor_precision_increment(const Item *item) const
+{
+  return item->decimals;
+}
+
+uint Type_handler_temporal_result::
+       Item_divisor_precision_increment_with_seconds(const Item *item) const
+{
+  return item->decimals <  NOT_FIXED_DEC ?
+         item->decimals :
+         TIME_SECOND_PART_DIGITS;
+}
+
+/***************************************************************************/
+
+bool Type_handler_real_result::
+       subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+{
+  DBUG_ASSERT(inner->cmp_type() == REAL_RESULT);
+  return outer->cmp_type() == REAL_RESULT;
+}
+
+
+bool Type_handler_int_result::
+       subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+{
+  DBUG_ASSERT(inner->cmp_type() == INT_RESULT);
+  return outer->cmp_type() == INT_RESULT;
+}
+
+
+bool Type_handler_decimal_result::
+       subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+{
+  DBUG_ASSERT(inner->cmp_type() == DECIMAL_RESULT);
+  return outer->cmp_type() == DECIMAL_RESULT;
+}
+
+
+bool Type_handler_string_result::
+       subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+{
+  DBUG_ASSERT(inner->cmp_type() == STRING_RESULT);
+  return outer->cmp_type() == STRING_RESULT &&
+         outer->collation.collation == inner->collation.collation &&
+         /*
+           Materialization also is unable to work when create_tmp_table() will
+           create a blob column because item->max_length is too big.
+           The following test is copied from varstring_type_handler().
+         */
+         !inner->too_big_for_varchar();
+}
+
+
+bool Type_handler_temporal_result::
+       subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+{
+  DBUG_ASSERT(inner->cmp_type() == TIME_RESULT);
+  return mysql_timestamp_type() ==
+         outer->type_handler()->mysql_timestamp_type();
+}
+
+/***************************************************************************/
+
+
+const Type_handler *
+Type_handler_null::type_handler_for_tmp_table(const Item *item) const
+{
+  return &type_handler_string;
+}
+
+
+const Type_handler *
+Type_handler_null::type_handler_for_union(const Item *item) const
+{
+  return &type_handler_string;
+}
+
+
+const Type_handler *
+Type_handler_olddecimal::type_handler_for_tmp_table(const Item *item) const
+{
+  return &type_handler_newdecimal;
+}
+
+const Type_handler *
+Type_handler_olddecimal::type_handler_for_union(const Item *item) const
+{
+  return &type_handler_newdecimal;
+}
+
+
+/***************************************************************************/
+
+bool Type_handler::check_null(const Item *item, st_value *value) const
+{
+  if (item->null_value)
+  {
+    value->m_type= DYN_COL_NULL;
+    return true;
+  }
+  return false;
+}
+
+
+bool Type_handler_null::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= DYN_COL_NULL;
+  return true;
+}
+
+
+bool Type_handler_row::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  DBUG_ASSERT(0);
+  value->m_type= DYN_COL_NULL;
+  return true;
+}
+
+
+bool Type_handler_int_result::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= item->unsigned_flag ? DYN_COL_UINT : DYN_COL_INT;
+  value->value.m_longlong= item->val_int();
+  return check_null(item, value);
+}
+
+
+bool Type_handler_real_result::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= DYN_COL_DOUBLE;
+  value->value.m_double= item->val_real();
+  return check_null(item, value);
+}
+
+
+bool Type_handler_decimal_result::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= DYN_COL_DECIMAL;
+  my_decimal *dec= item->val_decimal(&value->m_decimal);
+  if (dec != &value->m_decimal && !item->null_value)
+    my_decimal2decimal(dec, &value->m_decimal);
+  return check_null(item, value);
+}
+
+
+bool Type_handler_string_result::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= DYN_COL_STRING;
+  String *str= item->val_str(&value->m_string);
+  if (str != &value->m_string && !item->null_value)
+    value->m_string.set(str->ptr(), str->length(), str->charset());
+  return check_null(item, value);
+}
+
+
+bool Type_handler_temporal_with_date::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= DYN_COL_DATETIME;
+  item->get_date(&value->value.m_time, sql_mode_for_dates(current_thd));
+  return check_null(item, value);
+}
+
+
+bool Type_handler_time_common::
+       Item_save_in_value(Item *item, st_value *value) const
+{
+  value->m_type= DYN_COL_DATETIME;
+  item->get_time(&value->value.m_time);
+  return check_null(item, value);
+}
+
+/***************************************************************************/

sql/sql_type.h

@@ -60,9 +60,9 @@ class Item_func_div;
 class Item_func_mod;
 class cmp_item;
 class in_vector;
-class Type_std_attributes;
 class Sort_param;
 class Arg_comparator;
+struct st_value;
 struct TABLE;
 struct SORT_FIELD_ATTR;
 
@@ -130,6 +130,21 @@ public:
     derivation= DERIVATION_NONE;
     repertoire= MY_REPERTOIRE_UNICODE30;
   }
+  DTCollation(CHARSET_INFO *collation_arg)
+  {
+    /*
+      This constructor version is used in combination with Field constructors,
+      to pass "CHARSET_INFO" instead of the full DTCollation.
+      Therefore, derivation is set to DERIVATION_IMPLICIT, which is the
+      proper derivation for table fields.
+      We should eventually remove all code pieces that pass "CHARSET_INFO"
+      (e.g. in storage engine sources) and fix to pass the full DTCollation
+      instead. Then, this constructor can be removed.
+    */
+    collation= collation_arg;
+    derivation= DERIVATION_IMPLICIT;
+    repertoire= my_charset_repertoire(collation_arg);
+  }
   DTCollation(CHARSET_INFO *collation_arg, Derivation derivation_arg)
   {
     collation= collation_arg;
@@ -311,6 +326,155 @@ public:
   {
     fix_attributes_temporal(MAX_DATETIME_WIDTH, dec);
   }
+
+  void count_only_length(Item **item, uint nitems);
+  void count_octet_length(Item **item, uint nitems);
+  void count_real_length(Item **item, uint nitems);
+  void count_decimal_length(Item **item, uint nitems);
+  bool count_string_length(const char *func_name, Item **item, uint nitems);
+  uint count_max_decimals(Item **item, uint nitems);
+
+  void aggregate_attributes_int(Item **items, uint nitems)
+  {
+    collation.set_numeric();
+    count_only_length(items, nitems);
+    decimals= 0;
+  }
+  void aggregate_attributes_real(Item **items, uint nitems)
+  {
+    collation.set_numeric();
+    count_real_length(items, nitems);
+  }
+  void aggregate_attributes_decimal(Item **items, uint nitems)
+  {
+    collation.set_numeric();
+    count_decimal_length(items, nitems);
+  }
+  bool aggregate_attributes_string(const char *func_name,
+                                   Item **item, uint nitems)
+  {
+    return count_string_length(func_name, item, nitems);
+  }
+  void aggregate_attributes_temporal(uint int_part_length,
+                                     Item **item, uint nitems)
+  {
+    fix_attributes_temporal(int_part_length, count_max_decimals(item, nitems));
+  }
+
+  bool agg_item_collations(DTCollation &c, const char *name,
+                           Item **items, uint nitems,
+                           uint flags, int item_sep);
+  bool agg_item_set_converter(const DTCollation &coll, const char *fname,
+                              Item **args, uint nargs,
+                              uint flags, int item_sep);
+
+  /*
+    Collect arguments' character sets together.
+    We allow to apply automatic character set conversion in some cases.
+    The conditions when conversion is possible are:
+    - arguments A and B have different charsets
+    - A wins according to coercibility rules
+      (i.e. a column is stronger than a string constant,
+       an explicit COLLATE clause is stronger than a column)
+    - character set of A is either superset for character set of B,
+      or B is a string constant which can be converted into the
+      character set of A without data loss.
+
+    If all of the above is true, then it's possible to convert
+    B into the character set of A, and then compare according
+    to the collation of A.
+
+    For functions with more than two arguments:
+
+      collect(A,B,C) ::= collect(collect(A,B),C)
+
+    Since this function calls THD::change_item_tree() on the passed Item **
+    pointers, it is necessary to pass the original Item **'s, not copies.
+    Otherwise their values will not be properly restored (see BUG#20769).
+    If the items are not consecutive (eg. args[2] and args[5]), use the
+    item_sep argument, ie.
+
+      agg_item_charsets(coll, fname, &args[2], 2, flags, 3)
+  */
+  bool agg_arg_charsets(DTCollation &c, const char *func_name,
+                        Item **items, uint nitems,
+                        uint flags, int item_sep)
+  {
+    if (agg_item_collations(c, func_name, items, nitems, flags, item_sep))
+      return true;
+    return agg_item_set_converter(c, func_name, items, nitems, flags, item_sep);
+  }
+  /*
+    Aggregate arguments for string result, e.g: CONCAT(a,b)
+    - convert to @@character_set_connection if all arguments are numbers
+    - allow DERIVATION_NONE
+  */
+  bool agg_arg_charsets_for_string_result(DTCollation &c, const char *func_name,
+                                          Item **items, uint nitems,
+                                          int item_sep)
+  {
+    uint flags= MY_COLL_ALLOW_SUPERSET_CONV |
+                MY_COLL_ALLOW_COERCIBLE_CONV |
+                MY_COLL_ALLOW_NUMERIC_CONV;
+    return agg_arg_charsets(c, func_name, items, nitems, flags, item_sep);
+  }
+  /*
+    Aggregate arguments for string result, when some comparison
+    is involved internally, e.g: REPLACE(a,b,c)
+    - convert to @@character_set_connection if all arguments are numbers
+    - disallow DERIVATION_NONE
+  */
+  bool agg_arg_charsets_for_string_result_with_comparison(DTCollation &c,
+                                                          const char *func_name,
+                                                          Item **items,
+                                                          uint nitems,
+                                                          int item_sep)
+  {
+    uint flags= MY_COLL_ALLOW_SUPERSET_CONV |
+                MY_COLL_ALLOW_COERCIBLE_CONV |
+                MY_COLL_ALLOW_NUMERIC_CONV |
+                MY_COLL_DISALLOW_NONE;
+    return agg_arg_charsets(c, func_name, items, nitems, flags, item_sep);
+  }
+
+  /*
+    Aggregate arguments for comparison, e.g: a=b, a LIKE b, a RLIKE b
+    - don't convert to @@character_set_connection if all arguments are numbers
+    - don't allow DERIVATION_NONE
+  */
+  bool agg_arg_charsets_for_comparison(DTCollation &c,
+                                       const char *func_name,
+                                       Item **items, uint nitems,
+                                       int item_sep)
+  {
+    uint flags= MY_COLL_ALLOW_SUPERSET_CONV |
+                MY_COLL_ALLOW_COERCIBLE_CONV |
+                MY_COLL_DISALLOW_NONE;
+    return agg_arg_charsets(c, func_name, items, nitems, flags, item_sep);
+  }
+
+};
+
+
+class Type_all_attributes: public Type_std_attributes
+{
+public:
+  Type_all_attributes()
+   :Type_std_attributes()
+  { }
+  Type_all_attributes(const Type_all_attributes *other)
+   :Type_std_attributes(other)
+  { }
+  // Returns total number of decimal digits
+  virtual uint decimal_precision() const= 0;
+  /*
+    Field::geometry_type is not visible here.
+    Let's use an "uint" wrapper for now. Later when we move Field_geom
+    into a plugin, this method will be replaced to some generic
+    datatype indepented method.
+  */
+  virtual uint uint_geometry_type() const= 0;
+  virtual TYPELIB *get_typelib() const { return NULL; }
 };
 
 
@@ -327,6 +491,31 @@ public:
 };
 
 
+class Record_addr
+{
+public:
+  uchar *ptr;      // Position to field in record
+  /**
+     Byte where the @c NULL bit is stored inside a record. If this Field is a
+     @c NOT @c NULL field, this member is @c NULL.
+  */
+  uchar *null_ptr;
+  uchar null_bit;  // Bit used to test null bit
+  Record_addr(uchar *ptr_arg,
+              uchar *null_ptr_arg,
+              uchar null_bit_arg)
+   :ptr(ptr_arg),
+    null_ptr(null_ptr_arg),
+    null_bit(null_bit_arg)
+  { }
+  Record_addr(bool maybe_null)
+   :ptr(NULL),
+    null_ptr(maybe_null ? (uchar*) "" : 0),
+    null_bit(0)
+  { }
+};
+
+
 class Type_handler
 {
 protected:
@@ -341,8 +530,19 @@ protected:
   Item_func_or_sum_illegal_param(const char *name) const;
   bool
   Item_func_or_sum_illegal_param(const Item_func_or_sum *) const;
+  bool check_null(const Item *item, st_value *value) const;
 public:
+  static const Type_handler *blob_type_handler(uint max_octet_length);
   static const Type_handler *string_type_handler(uint max_octet_length);
+  /**
+    Return a string type handler for Item
+    If too_big_for_varchar() returns a BLOB variant, according to length.
+    If max_length > 0 create a VARCHAR(n)
+    If max_length == 0 create a CHAR(0)
+    @param item - the Item to get the handler to.
+  */
+  static const Type_handler *varstring_type_handler(const Item *item);
+  static const Type_handler *blob_type_handler(const Item *item);
   static const Type_handler *get_handler_by_field_type(enum_field_types type);
   static const Type_handler *get_handler_by_real_type(enum_field_types type);
   static const Type_handler *get_handler_by_cmp_type(Item_result type);
@@ -367,6 +567,10 @@ public:
   virtual enum_field_types real_field_type() const { return field_type(); }
   virtual Item_result result_type() const= 0;
   virtual Item_result cmp_type() const= 0;
+  virtual enum_mysql_timestamp_type mysql_timestamp_type() const
+  {
+    return MYSQL_TIMESTAMP_ERROR;
+  }
   /**
     Prepared statement long data:
     Check whether this parameter data type is compatible with long data.
@@ -375,6 +579,22 @@ public:
   */
   virtual bool is_param_long_data_type() const { return false; }
   virtual const Type_handler *type_handler_for_comparison() const= 0;
+  virtual const Type_handler *type_handler_for_item_field() const
+  {
+    return this;
+  }
+  virtual const Type_handler *type_handler_for_tmp_table(const Item *) const
+  {
+    return this;
+  }
+  virtual const Type_handler *type_handler_for_union(const Item *) const
+  {
+    return this;
+  }
+  virtual const Type_handler *cast_to_int_type_handler() const
+  {
+    return this;
+  }
   virtual CHARSET_INFO *charset_for_protocol(const Item *item) const;
   virtual const Type_handler*
   type_handler_adjusted_to_max_octet_length(uint max_octet_length,
@@ -391,6 +611,12 @@ public:
   }
   virtual uint Item_time_precision(Item *item) const;
   virtual uint Item_datetime_precision(Item *item) const;
+  virtual uint Item_decimal_scale(const Item *item) const;
+  /*
+    Returns how many digits a divisor adds into a division result.
+    See Item::divisor_precision_increment() in item.h for more comments.
+  */
+  virtual uint Item_divisor_precision_increment(const Item *) const;
   /**
     Makes a temporary table Field to handle numeric aggregate functions,
     e.g. SUM(DISTINCT expr), AVG(DISTINCT expr), etc.
@@ -427,6 +653,14 @@ public:
   virtual Field *make_conversion_table_field(TABLE *TABLE,
                                              uint metadata,
                                              const Field *target) const= 0;
+  virtual Field *make_table_field(const LEX_CSTRING *name,
+                                  const Record_addr &addr,
+                                  const Type_all_attributes &attr,
+                                  TABLE *table) const= 0;
+  Field *make_and_init_table_field(const LEX_CSTRING *name,
+                                   const Record_addr &addr,
+                                   const Type_all_attributes &attr,
+                                   TABLE *table) const;
   virtual void make_sort_key(uchar *to, Item *item,
                              const SORT_FIELD_ATTR *sort_field,
                              Sort_param *param) const= 0;
@@ -435,6 +669,7 @@ public:
                           SORT_FIELD_ATTR *attr) const= 0;
 
   virtual uint32 max_display_length(const Item *item) const= 0;
+  virtual bool Item_save_in_value(Item *item, st_value *value) const= 0;
   virtual int Item_save_in_field(Item *item, Field *field,
                                  bool no_conversions) const= 0;
 
@@ -480,6 +715,9 @@ public:
                                Item *target_expr, Item *target_value,
                                Item_bool_func2 *source,
                                Item *source_expr, Item *source_const) const= 0;
+  virtual bool
+  subquery_type_allows_materialization(const Item *inner,
+                                       const Item *outer) const= 0;
   virtual Item_cache *Item_get_cache(THD *thd, const Item *item) const= 0;
   virtual bool set_comparator_func(Arg_comparator *cmp) const= 0;
   virtual bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
@@ -605,6 +843,12 @@ public:
     return ROW_RESULT;
   }
   const Type_handler *type_handler_for_comparison() const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+  {
+    DBUG_ASSERT(0);
+    return false;
+  }
   Field *make_num_distinct_aggregator_field(MEM_ROOT *, const Item *) const
   {
     DBUG_ASSERT(0);
@@ -617,6 +861,14 @@ public:
     DBUG_ASSERT(0);
     return NULL;
   }
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const
+  {
+    DBUG_ASSERT(0);
+    return NULL;
+  }
   void make_sort_key(uchar *to, Item *item,
                      const SORT_FIELD_ATTR *sort_field,
                      Sort_param *param) const
@@ -633,6 +885,7 @@ public:
     DBUG_ASSERT(0);
     return 0;
   }
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const
   {
     DBUG_ASSERT(0);
@@ -834,11 +1087,14 @@ public:
   Item_result cmp_type() const { return REAL_RESULT; }
   virtual ~Type_handler_real_result() {}
   const Type_handler *type_handler_for_comparison() const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const;
   void make_sort_key(uchar *to, Item *item, const SORT_FIELD_ATTR *sort_field,
                      Sort_param *param) const;
   void sortlength(THD *thd,
                   const Type_std_attributes *item,
                   SORT_FIELD_ATTR *attr) const;
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
   Item_cache *Item_get_cache(THD *thd, const Item *item) const;
   bool set_comparator_func(Arg_comparator *cmp) const;
@@ -889,6 +1145,8 @@ public:
   Item_result cmp_type() const { return DECIMAL_RESULT; }
   virtual ~Type_handler_decimal_result() {};
   const Type_handler *type_handler_for_comparison() const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const;
   Field *make_num_distinct_aggregator_field(MEM_ROOT *, const Item *) const;
   void make_sort_key(uchar *to, Item *item, const SORT_FIELD_ATTR *sort_field,
                      Sort_param *param) const;
@@ -896,6 +1154,7 @@ public:
                   const Type_std_attributes *item,
                   SORT_FIELD_ATTR *attr) const;
   uint32 max_display_length(const Item *item) const;
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
   Item_cache *Item_get_cache(THD *thd, const Item *item) const;
   bool set_comparator_func(Arg_comparator *cmp) const;
@@ -943,12 +1202,15 @@ public:
   Item_result cmp_type() const { return INT_RESULT; }
   virtual ~Type_handler_int_result() {}
   const Type_handler *type_handler_for_comparison() const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const;
   Field *make_num_distinct_aggregator_field(MEM_ROOT *, const Item *) const;
   void make_sort_key(uchar *to, Item *item, const SORT_FIELD_ATTR *sort_field,
                      Sort_param *param) const;
   void sortlength(THD *thd,
                   const Type_std_attributes *item,
                   SORT_FIELD_ATTR *attr) const;
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
   Item_cache *Item_get_cache(THD *thd, const Item *item) const;
   bool set_comparator_func(Arg_comparator *cmp) const;
@@ -991,6 +1253,9 @@ public:
 
 class Type_handler_temporal_result: public Type_handler
 {
+protected:
+  uint Item_decimal_scale_with_seconds(const Item *item) const;
+  uint Item_divisor_precision_increment_with_seconds(const Item *) const;
 public:
   Item_result result_type() const { return STRING_RESULT; }
   Item_result cmp_type() const { return TIME_RESULT; }
@@ -1005,6 +1270,8 @@ public:
                                    Item *target_expr, Item *target_value,
                                    Item_bool_func2 *source,
                                    Item *source_expr, Item *source_const) const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const;
   Item_cache *Item_get_cache(THD *thd, const Item *item) const;
   bool set_comparator_func(Arg_comparator *cmp) const;
   bool Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const;
@@ -1072,6 +1339,7 @@ public:
   {
     return Item_temporal_precision(item, false);
   }
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
   String *print_item_value(THD *thd, Item *item, String *str) const
   {
@@ -1081,6 +1349,8 @@ public:
                                    Item *target_expr, Item *target_value,
                                    Item_bool_func2 *source,
                                    Item *source_expr, Item *source_const) const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const;
   Item_cache *Item_get_cache(THD *thd, const Item *item) const;
   bool set_comparator_func(Arg_comparator *cmp) const;
   bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
@@ -1156,6 +1426,10 @@ public:
   uint32 max_display_length(const Item *item) const { return 4; }
   Field *make_conversion_table_field(TABLE *TABLE, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1169,6 +1443,10 @@ public:
   uint32 max_display_length(const Item *item) const { return 6; }
   Field *make_conversion_table_field(TABLE *TABLE, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1185,6 +1463,10 @@ public:
   }
   Field *make_conversion_table_field(TABLE *TABLE, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1198,6 +1480,10 @@ public:
   uint32 max_display_length(const Item *item) const { return 20; }
   Field *make_conversion_table_field(TABLE *TABLE, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1211,6 +1497,10 @@ public:
   uint32 max_display_length(const Item *item) const { return 8; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1224,6 +1514,10 @@ public:
   uint32 max_display_length(const Item *item) const;
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1241,6 +1535,10 @@ public:
   }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1255,6 +1553,10 @@ public:
   Field *make_num_distinct_aggregator_field(MEM_ROOT *, const Item *) const;
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1268,6 +1570,10 @@ public:
   uint32 max_display_length(const Item *item) const { return 53; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1278,7 +1584,20 @@ public:
   virtual ~Type_handler_time_common() { }
   const Name name() const { return m_name_time; }
   enum_field_types field_type() const { return MYSQL_TYPE_TIME; }
+  enum_mysql_timestamp_type mysql_timestamp_type() const
+  {
+    return MYSQL_TIMESTAMP_TIME;
+  }
+  uint Item_decimal_scale(const Item *item) const
+  {
+    return Item_decimal_scale_with_seconds(item);
+  }
+  uint Item_divisor_precision_increment(const Item *item) const
+  {
+    return Item_divisor_precision_increment_with_seconds(item);
+  }
   const Type_handler *type_handler_for_comparison() const;
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
   String *print_item_value(THD *thd, Item *item, String *str) const;
   bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
@@ -1294,6 +1613,10 @@ public:
   virtual ~Type_handler_time() {}
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1304,6 +1627,10 @@ public:
   enum_field_types real_field_type() const { return MYSQL_TYPE_TIME2; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1312,6 +1639,7 @@ class Type_handler_temporal_with_date: public Type_handler_temporal_result
 public:
   virtual ~Type_handler_temporal_with_date() {}
   const Type_handler *type_handler_for_comparison() const;
+  bool Item_save_in_value(Item *item, st_value *value) const;
   int Item_save_in_field(Item *item, Field *field, bool no_conversions) const;
   cmp_item *make_cmp_item(THD *thd, CHARSET_INFO *cs) const;
   in_vector *make_in_vector(THD *, const Item_func_in *, uint nargs) const;
@@ -1325,6 +1653,10 @@ public:
   virtual ~Type_handler_date_common() {}
   const Name name() const { return m_name_date; }
   enum_field_types field_type() const { return MYSQL_TYPE_DATE; }
+  enum_mysql_timestamp_type mysql_timestamp_type() const
+  {
+    return MYSQL_TIMESTAMP_DATE;
+  }
   String *print_item_value(THD *thd, Item *item, String *str) const;
   bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
                                        Item **items, uint nitems) const;
@@ -1336,6 +1668,10 @@ public:
   virtual ~Type_handler_date() {}
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1343,8 +1679,13 @@ class Type_handler_newdate: public Type_handler_date_common
 {
 public:
   virtual ~Type_handler_newdate() {}
+  enum_field_types real_field_type() const { return MYSQL_TYPE_NEWDATE; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1355,6 +1696,18 @@ public:
   virtual ~Type_handler_datetime_common() {}
   const Name name() const { return m_name_datetime; }
   enum_field_types field_type() const { return MYSQL_TYPE_DATETIME; }
+  enum_mysql_timestamp_type mysql_timestamp_type() const
+  {
+    return MYSQL_TIMESTAMP_DATETIME;
+  }
+  uint Item_decimal_scale(const Item *item) const
+  {
+    return Item_decimal_scale_with_seconds(item);
+  }
+  uint Item_divisor_precision_increment(const Item *item) const
+  {
+    return Item_divisor_precision_increment_with_seconds(item);
+  }
   String *print_item_value(THD *thd, Item *item, String *str) const;
   bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
                                        Item **items, uint nitems) const;
@@ -1367,6 +1720,10 @@ public:
   virtual ~Type_handler_datetime() {}
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1377,6 +1734,10 @@ public:
   enum_field_types real_field_type() const { return MYSQL_TYPE_DATETIME2; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1387,6 +1748,18 @@ public:
   virtual ~Type_handler_timestamp_common() {}
   const Name name() const { return m_name_timestamp; }
   enum_field_types field_type() const { return MYSQL_TYPE_TIMESTAMP; }
+  enum_mysql_timestamp_type mysql_timestamp_type() const
+  {
+    return MYSQL_TIMESTAMP_DATETIME;
+  }
+  uint Item_decimal_scale(const Item *item) const
+  {
+    return Item_decimal_scale_with_seconds(item);
+  }
+  uint Item_divisor_precision_increment(const Item *item) const
+  {
+    return Item_divisor_precision_increment_with_seconds(item);
+  }
   String *print_item_value(THD *thd, Item *item, String *str) const;
   bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
                                        Item **items, uint nitems) const;
@@ -1399,6 +1772,10 @@ public:
   virtual ~Type_handler_timestamp() {}
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1409,6 +1786,10 @@ public:
   enum_field_types real_field_type() const { return MYSQL_TYPE_TIMESTAMP2; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1419,8 +1800,14 @@ public:
   virtual ~Type_handler_olddecimal() {}
   const Name name() const { return m_name_decimal; }
   enum_field_types field_type() const { return MYSQL_TYPE_DECIMAL; }
+  const Type_handler *type_handler_for_tmp_table(const Item *item) const;
+  const Type_handler *type_handler_for_union(const Item *item) const;
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1433,6 +1820,10 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_NEWDECIMAL; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1444,9 +1835,16 @@ public:
   const Name name() const { return m_name_null; }
   enum_field_types field_type() const { return MYSQL_TYPE_NULL; }
   const Type_handler *type_handler_for_comparison() const;
+  const Type_handler *type_handler_for_tmp_table(const Item *item) const;
+  const Type_handler *type_handler_for_union(const Item *) const;
   uint32 max_display_length(const Item *item) const { return 0; }
+  bool Item_save_in_value(Item *item, st_value *value) const;
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1458,8 +1856,36 @@ public:
   const Name name() const { return m_name_char; }
   enum_field_types field_type() const { return MYSQL_TYPE_STRING; }
   bool is_param_long_data_type() const { return true; }
+  const Type_handler *type_handler_for_tmp_table(const Item *item) const
+  {
+    return varstring_type_handler(item);
+  }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
+};
+
+
+/* Old varchar */
+class Type_handler_var_string: public Type_handler_string
+{
+  static const Name m_name_var_string;
+public:
+  virtual ~Type_handler_var_string() {}
+  const Name name() const { return m_name_var_string; }
+  enum_field_types field_type() const { return MYSQL_TYPE_VAR_STRING; }
+  enum_field_types real_field_type() const { return MYSQL_TYPE_STRING; }
+  const Type_handler *type_handler_for_tmp_table(const Item *item) const
+  {
+    return varstring_type_handler(item);
+  }
+  const Type_handler *type_handler_for_union(const Item *item) const
+  {
+    return varstring_type_handler(item);
+  }
 };
 
 
@@ -1470,9 +1896,21 @@ public:
   virtual ~Type_handler_varchar() {}
   const Name name() const { return m_name_varchar; }
   enum_field_types field_type() const { return MYSQL_TYPE_VARCHAR; }
+  const Type_handler *type_handler_for_tmp_table(const Item *item) const
+  {
+    return varstring_type_handler(item);
+  }
+  const Type_handler *type_handler_for_union(const Item *item) const
+  {
+    return varstring_type_handler(item);
+  }
   bool is_param_long_data_type() const { return true; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1480,7 +1918,22 @@ class Type_handler_blob_common: public Type_handler_string_result
 {
 public:
   virtual ~Type_handler_blob_common() { }
+  const Type_handler *type_handler_for_tmp_table(const Item *item) const
+  {
+    return blob_type_handler(item);
+  }
+  const Type_handler *type_handler_for_union(const Item *item) const
+  {
+    return blob_type_handler(item);
+  }
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+  {
+    return false; // Materialization does not work with BLOB columns
+  }
   bool is_param_long_data_type() const { return true; }
+  bool Item_hybrid_func_fix_attributes(THD *thd, Item_hybrid_func *func,
+                                       Item **items, uint nitems) const;
 };
 
 
@@ -1493,6 +1946,10 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_TINY_BLOB; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1505,6 +1962,10 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_MEDIUM_BLOB; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1517,6 +1978,10 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_LONG_BLOB; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1529,6 +1994,10 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_BLOB; }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1542,8 +2011,18 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_GEOMETRY; }
   bool is_param_long_data_type() const { return true; }
   const Type_handler *type_handler_for_comparison() const;
+  bool subquery_type_allows_materialization(const Item *inner,
+                                            const Item *outer) const
+  {
+    return false; // Materialization does not work with GEOMETRY columns
+  }
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
+
   bool is_traditional_type() const
   {
     return false;
@@ -1576,10 +2055,16 @@ class Type_handler_enum: public Type_handler_string_result
 public:
   virtual ~Type_handler_enum() {}
   const Name name() const { return m_name_enum; }
-  enum_field_types field_type() const { return MYSQL_TYPE_VARCHAR; }
+  enum_field_types field_type() const { return MYSQL_TYPE_STRING; }
   virtual enum_field_types real_field_type() const { return MYSQL_TYPE_ENUM; }
+  const Type_handler *type_handler_for_item_field() const;
+  const Type_handler *cast_to_int_type_handler() const;
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1589,10 +2074,16 @@ class Type_handler_set: public Type_handler_string_result
 public:
   virtual ~Type_handler_set() {}
   const Name name() const { return m_name_set; }
-  enum_field_types field_type() const { return MYSQL_TYPE_VARCHAR; }
+  enum_field_types field_type() const { return MYSQL_TYPE_STRING; }
   virtual enum_field_types real_field_type() const { return MYSQL_TYPE_SET; }
+  const Type_handler *type_handler_for_item_field() const;
+  const Type_handler *cast_to_int_type_handler() const;
   Field *make_conversion_table_field(TABLE *, uint metadata,
                                      const Field *target) const;
+  Field *make_table_field(const LEX_CSTRING *name,
+                          const Record_addr &addr,
+                          const Type_all_attributes &attr,
+                          TABLE *table) const;
 };
 
 
@@ -1628,6 +2119,10 @@ public:
   }
   Item_result result_type() const { return m_type_handler->result_type(); }
   Item_result cmp_type() const { return m_type_handler->cmp_type(); }
+  enum_mysql_timestamp_type mysql_timestamp_type() const
+  {
+    return m_type_handler->mysql_timestamp_type();
+  }
   void set_handler(const Type_handler *other)
   {
     m_type_handler= other;
@@ -1673,22 +2168,47 @@ public:
 
 extern Type_handler_row         type_handler_row;
 extern Type_handler_null        type_handler_null;
-extern Type_handler_string type_handler_string;
+
-extern Type_handler_varchar type_handler_varchar;
-extern Type_handler_longlong type_handler_longlong;
 extern Type_handler_float       type_handler_float;
 extern Type_handler_double      type_handler_double;
-extern Type_handler_newdecimal type_handler_newdecimal;
+
-extern Type_handler_datetime type_handler_datetime;
-extern Type_handler_longlong type_handler_longlong;
 extern Type_handler_bit         type_handler_bit;
+
 extern Type_handler_enum        type_handler_enum;
 extern Type_handler_set         type_handler_set;
 
-extern Type_handler_time2       type_handler_time2;
+extern Type_handler_string      type_handler_string;
-extern Type_handler_newdate     type_handler_newdate;
+extern Type_handler_var_string  type_handler_var_string;
-extern Type_handler_datetime2   type_handler_datetime2;
+extern Type_handler_varchar     type_handler_varchar;
 
+extern Type_handler_tiny_blob   type_handler_tiny_blob;
+extern Type_handler_medium_blob type_handler_medium_blob;
+extern Type_handler_long_blob   type_handler_long_blob;
+extern Type_handler_blob        type_handler_blob;
+
+extern Type_handler_tiny        type_handler_tiny;
+extern Type_handler_short       type_handler_short;
+extern Type_handler_int24       type_handler_int24;
+extern Type_handler_long        type_handler_long;
+extern Type_handler_longlong    type_handler_longlong;
+
+extern Type_handler_newdecimal  type_handler_newdecimal;
+extern Type_handler_olddecimal  type_handler_olddecimal;
+
+extern Type_handler_year        type_handler_year;
+extern Type_handler_newdate     type_handler_newdate;
+extern Type_handler_date        type_handler_date;
+extern Type_handler_time        type_handler_time;
+extern Type_handler_time2       type_handler_time2;
+extern Type_handler_datetime    type_handler_datetime;
+extern Type_handler_datetime2   type_handler_datetime2;
+extern Type_handler_timestamp   type_handler_timestamp;
+extern Type_handler_timestamp2  type_handler_timestamp2;
+
+extern Type_handler_tiny_blob   type_handler_tiny_blob;
+extern Type_handler_blob        type_handler_blob;
+extern Type_handler_medium_blob type_handler_medium_blob;
+extern Type_handler_long_blob   type_handler_long_blob;
 
 class Type_aggregator
 {

sql/sql_union.cc

@@ -636,6 +636,59 @@ st_select_lex_unit::init_prepare_fake_select_lex(THD *thd_arg,
 }
 
 
+bool st_select_lex_unit::prepare_join(THD *thd_arg, SELECT_LEX *sl,
+                                      select_result *tmp_result,
+                                      ulong additional_options,
+                                      bool is_union_select)
+{
+  DBUG_ENTER("st_select_lex_unit::prepare_join");
+  bool can_skip_order_by;
+  sl->options|=  SELECT_NO_UNLOCK;
+  JOIN *join= new JOIN(thd_arg, sl->item_list,
+                       (sl->options | thd_arg->variables.option_bits |
+                        additional_options),
+                       tmp_result);
+  if (!join)
+    DBUG_RETURN(true);
+
+  thd_arg->lex->current_select= sl;
+
+  can_skip_order_by= is_union_select && !(sl->braces && sl->explicit_limit);
+
+  saved_error= join->prepare(sl->table_list.first,
+                             sl->with_wild,
+                             sl->where,
+                             (can_skip_order_by ? 0 :
+                              sl->order_list.elements) +
+                             sl->group_list.elements,
+                             can_skip_order_by ?
+                             NULL : sl->order_list.first,
+                             can_skip_order_by,
+                             sl->group_list.first,
+                             sl->having,
+                             (is_union_select ? NULL :
+                              thd_arg->lex->proc_list.first),
+                             sl, this);
+
+  /* There are no * in the statement anymore (for PS) */
+  sl->with_wild= 0;
+  last_procedure= join->procedure;
+
+  if (saved_error || (saved_error= thd_arg->is_fatal_error))
+    DBUG_RETURN(true);
+  /*
+    Remove all references from the select_lex_units to the subqueries that
+    are inside the ORDER BY clause.
+  */
+  if (can_skip_order_by)
+  {
+    for (ORDER *ord= (ORDER *)sl->order_list.first; ord; ord= ord->next)
+    {
+      (*ord->item)->walk(&Item::eliminate_subselect_processor, FALSE, NULL);
+    }
+  }
+  DBUG_RETURN(false);
+}
 
 
 bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
@@ -748,14 +801,21 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
 
   sl->context.resolve_in_select_list= TRUE;
 
+  if (!is_union_select && !is_recursive)
+  {
+    if (prepare_join(thd_arg, first_sl, tmp_result, additional_options,
+                     is_union_select))
+      goto err;
+    types= first_sl->item_list;
+    goto cont;
+  }
+ 
   for (;sl; sl= sl->next_select())
   {
-    bool can_skip_order_by;
+    if (prepare_join(thd_arg, sl, tmp_result, additional_options,
-    sl->options|=  SELECT_NO_UNLOCK;
+                     is_union_select))
-    JOIN *join= new JOIN(thd_arg, sl->item_list,
+      goto err;
-			 (sl->options | thd_arg->variables.option_bits |
+
-                          additional_options),
-			 tmp_result);
     /*
       setup_tables_done_option should be set only for very first SELECT,
       because it protect from secont setup_tables call for select-like non
@@ -763,53 +823,12 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       SELECT (for union it can be only INSERT ... SELECT).
     */
     additional_options&= ~OPTION_SETUP_TABLES_DONE;
-    if (!join)
-      goto err;
-
-    thd_arg->lex->current_select= sl;
-
-    can_skip_order_by= is_union_select && !(sl->braces && sl->explicit_limit);
-
-    saved_error= join->prepare(sl->table_list.first,
-                               sl->with_wild,
-                               sl->where,
-                               (can_skip_order_by ? 0 :
-                                sl->order_list.elements) +
-                               sl->group_list.elements,
-                               can_skip_order_by ?
-                               NULL : sl->order_list.first,
-                               can_skip_order_by,
-                               sl->group_list.first,
-                               sl->having,
-                               (is_union_select ? NULL :
-                                thd_arg->lex->proc_list.first),
-                               sl, this);
-
-    /* There are no * in the statement anymore (for PS) */
-    sl->with_wild= 0;
-    last_procedure= join->procedure;
-
-    if (saved_error || (saved_error= thd_arg->is_fatal_error))
-      goto err;
-    /*
-      Remove all references from the select_lex_units to the subqueries that
-      are inside the ORDER BY clause.
-    */
-    if (can_skip_order_by)
-    {
-      for (ORDER *ord= (ORDER *)sl->order_list.first; ord; ord= ord->next)
-      {
-        (*ord->item)->walk(&Item::eliminate_subselect_processor, FALSE, NULL);
-      }
-    }
 
     /*
       Use items list of underlaid select for derived tables to preserve
       information about fields lengths and exact types
     */
-    if (!is_union_select && !is_recursive)
+    if (sl == first_sl)
-      types= first_sl->item_list;
-    else if (sl == first_sl)
     {
       if (is_recursive)
       {
@@ -846,6 +865,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
         Item *type, *item_tmp;
         while ((type= tp++, item_tmp= it++))
         {
+          DBUG_ASSERT(item_tmp->fixed);
           if (((Item_type_holder*)type)->join_types(thd_arg, item_tmp))
 	    DBUG_RETURN(TRUE);
         }
@@ -878,6 +898,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
     }      
   }
 
+cont:
   /*
     If the query is using select_union_direct, we have postponed
     preparation of the underlying select_result until column types

sql/sql_view.cc

@@ -156,7 +156,7 @@ bool check_duplicate_names(THD *thd, List<Item> &item_list, bool gen_unique_view
   DBUG_RETURN(FALSE);
 
 err:
-  my_error(ER_DUP_FIELDNAME, MYF(0), item->name);
+  my_error(ER_DUP_FIELDNAME, MYF(0), item->name.str);
   DBUG_RETURN(TRUE);
 }
 

sql/sql_yacc.yy

@@ -13713,27 +13713,7 @@ load_data_set_elem:
 text_literal:
           TEXT_STRING
           {
-            LEX_CSTRING tmp;
+            if (!($$= thd->make_string_literal($1)))
-            CHARSET_INFO *cs_con= thd->variables.collation_connection;
-            CHARSET_INFO *cs_cli= thd->variables.character_set_client;
-            uint repertoire= $1.repertoire(cs_cli);
-            if (thd->charset_is_collation_connection ||
-                (repertoire == MY_REPERTOIRE_ASCII &&
-                 my_charset_is_ascii_based(cs_con)))
-              tmp= $1;
-            else
-            {
-              LEX_STRING to;
-              if (thd->convert_string(&to, cs_con, $1.str, $1.length, cs_cli))
-                MYSQL_YYABORT;
-	      tmp.str=    to.str;
-	      tmp.length= to.length;
-            }
-            $$= new (thd->mem_root) Item_string(thd, tmp.str, tmp.length,
-                                                cs_con,
-                                                DERIVATION_COERCIBLE,
-                                                repertoire);
-            if ($$ == NULL)
               MYSQL_YYABORT;
           }
         | NCHAR_STRING

sql/sql_yacc_ora.yy

@@ -13837,27 +13837,7 @@ load_data_set_elem:
 text_literal:
           TEXT_STRING
           {
-            LEX_CSTRING tmp;
+            if (!($$= thd->make_string_literal($1)))
-            CHARSET_INFO *cs_con= thd->variables.collation_connection;
-            CHARSET_INFO *cs_cli= thd->variables.character_set_client;
-            uint repertoire= $1.repertoire(cs_cli);
-            if (thd->charset_is_collation_connection ||
-                (repertoire == MY_REPERTOIRE_ASCII &&
-                 my_charset_is_ascii_based(cs_con)))
-              tmp= $1;
-            else
-            {
-              LEX_STRING to;
-              if (thd->convert_string(&to, cs_con, $1.str, $1.length, cs_cli))
-                MYSQL_YYABORT;
-	      tmp.str=    to.str;
-	      tmp.length= to.length;
-            }
-            $$= new (thd->mem_root) Item_string(thd, tmp.str, tmp.length,
-                                                cs_con,
-                                                DERIVATION_COERCIBLE,
-                                                repertoire);
-            if ($$ == NULL)
               MYSQL_YYABORT;
           }
         | NCHAR_STRING