New CAST syntax

Cleanup of multi-table-delete in sql_yacc.yy Changed syntax of MAXIMUM QUERIES PER HOUR to MAX_QUERIES_PER_HOUR to not get too many reserved words. Docs/manual.texi: Updated information about CAST mysql-test/r/bigint.result: New CAST syntax mysql-test/r/create.result: New CAST syntax mysql-test/r/variables.result: Fix after merge with 3.23 mysql-test/t/bigint.test: New CAST syntax mysql-test/t/create.test: New CAST syntax sql/item_create.cc: New CAST syntax sql/item_func.h: New CAST syntax sql/item_timefunc.cc: New CAST syntax sql/item_timefunc.h: New CAST syntax sql/lex.h: Changed syntax to MAX_QUERIES_PER_HOUR to not get too many reserved words. sql/mysql_priv.h: Cleanup multi-delete sql/sql_parse.cc: Cleanup multi-delete sql/sql_yacc.yy: Cleanup multi-delete. New CAST syntax. Removed some restricted words.
2025-07-27 18:02:13 +03:00 · 2002-01-03 00:46:43 +02:00
parent 301cdf9f24
commit b79170b7fd
14 changed files with 201 additions and 136 deletions
--- a/Docs/manual.texi
+++ b/Docs/manual.texi
@ -22119,10 +22119,10 @@ is @code{localhost}.
 Lock all tables before starting the dump.  The tables are locked with
@code{READ LOCAL} to allow concurrent inserts in the case of @code{MyISAM}
 tables.
-@item -K, --no-disable-keys.
+@item -K, --disable-keys
@code{/*!40000 ALTER TABLE tb_name DISABLE KEYS */;} and
@code{/*!40000 ALTER TABLE tb_name ENABLE KEYS */;}
-will not be put in the output.
+will be put in the output.
@item -n, --no-create-db
@code{CREATE DATABASE /*!32312 IF NOT EXISTS*/ db_name;} will not be put in the
 output. The above line will be added otherwise, if --databases or
@ -29434,6 +29434,7 @@ mysql> select MOD(29,9);
 * String functions::            String functions
 * Numeric Functions::           Numeric Functions
 * Date and time functions::     Date and time functions
+* Cast Functions::              
 * Other Functions::             Other Functions
 * Group by functions::          Functions for Use with @code{GROUP BY} Clauses
@end menu
@ -30662,6 +30663,8 @@ mysql> select BINARY "a" = "A";
        -> 0
@end example

+@code{BINARY string} is a shorthand for @code{CAST(string AS BINARY)}.
+@xref{Cast Functions}.
@code{BINARY} was introduced in MySQL Version 3.23.0.

 Note that in some context MySQL will not be able to use the
@ -30685,7 +30688,6 @@ make string comparison even more flexible.
@menu
 * Arithmetic functions::        Arithmetic Operations
 * Mathematical functions::      Mathematical Functions
-* Numerical casts::             
@end menu


@ -30754,7 +30756,7 @@ in a context where its result is converted to an integer!
@end table


-@node Mathematical functions, Numerical casts, Arithmetic functions, Numeric Functions
+@node Mathematical functions,  , Arithmetic functions, Numeric Functions
@subsubsection Mathematical Functions
 All mathematical functions return @code{NULL} in case of an error.

@ -31151,37 +31153,7 @@ The above happens because 10.28 is actually stored as something like
 10.2799999999999999.
@end table

-@node Numerical casts,  , Mathematical functions, Numeric Functions
-@subsubsection Casting numbers to signed / unsigned
-
-@cindex casts, SIGNED
-@cindex casts, UNSIGNED
-
-To cast a string to a numeric value, you don't have to do anything; Just
-use the string value as it would be a number:
-
-@example
-mysql> select 1+'1';
-        -> 2
-@end example
-
-MySQL support arithmetic with both signed and unsigned 64 bit values.
-If you are using an numerical operations (like @code{+}) and one of the
-operands are @code{unsigned}, then the result will be unsigned.  You can
-override this by using the @code{SIGNED} and @code{UNSIGNED} cast
-operators, which will cast the operation to signed respective unsigned
-64 bit integer.
-
-@example
-mysql> select UNSIGNED 1-2;
-        -> 18446744073709551615
-mysql  select SIGNED (UNSIGNED 1-2);
-        -> -1
-@end example
-
-@code{SIGNED} and @code{UNSIGNED} where added in MySQL 4.0.2.
-
-@node Date and time functions, Other Functions, Numeric Functions, Functions
+@node Date and time functions, Cast Functions, Numeric Functions, Functions
@subsection Date and Time Functions

@findex date and time functions
@ -31678,8 +31650,8 @@ will return the internal timestamp value directly, with no implicit
 If you give @code{UNIX_TIMESTAMP()} a wrong or out-of-range date, it will
 return 0.

-If you want to subtract @code{UNIX_TIMESTAMP()} columns,
-@xref{Numerical casts}.
+If you want to subtract @code{UNIX_TIMESTAMP()} columns, you may want to
+cast the result to signed integers. @xref{Cast Functions}.

@findex FROM_UNIXTIME()
@item FROM_UNIXTIME(unix_timestamp)
@ -31731,8 +31703,74 @@ mysql> select TIME_TO_SEC('00:39:38');
@end example
@end table

+@node Cast Functions, Other Functions, Date and time functions, Functions
+@subsection Cast Functions

-@node Other Functions, Group by functions, Date and time functions, Functions
+The syntax of the @code{CAST} function is:
+
+@findex CAST
+@findex CONVERT
+
+@example
+CAST(expression AS type)
+
+or
+
+CONVERT(expression,type)
+@end example
+
+Where type is one of:
+@itemize @bullet
+@item
+@code{BINARY}
+@item
+@code{DATE}
+@item
+@code{DATETIME}
+@item
+@code{SIGNED @{INTEGER@}}
+@item
+@code{TIME}
+@item
+@code{UNSIGNED @{INTEGER@}}
+@end itemize
+
+@code{CAST()} is ANSI SQL99 syntax and @code{CONVERT()} is ODBC syntax.
+
+The cast function is mainly useful when you want to create a column with
+a specific type in a @code{CREATE ... SELECT}:
+
+@example
+CREATE TABLE new_table SELECT CAST('2000-01-01' AS DATE);
+@end example
+
+@code{CAST(string AS BINARY} is the same thing as @code{BINARY string}.
+
+To cast a string to a numeric value, you don't normally have to do
+anything; Just use the string value as it would be a number:
+
+@example
+mysql> select 1+'1';
+        -> 2
+@end example
+
+MySQL supports arithmetic with both signed and unsigned 64 bit values.
+If you are using an numerical operations (like @code{+}) and one of the
+operands are @code{unsigned}, then the result will be unsigned.  You can
+override this by using the @code{SIGNED} and @code{UNSIGNED} cast
+operators, which will cast the operation to signed respective unsigned
+64 bit integer.
+
+@example
+mysql> select CAST(1-2 AS UNSIGNED)
+        -> 18446744073709551615
+mysql  select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED);
+        -> -1
+@end example
+
+The @code{CAST()} and @code{CONVERT()} function was added in MySQL 4.0.2.
+
+@node Other Functions, Group by functions, Cast Functions, Functions
@subsection Other Functions

@menu
@ -47951,7 +47989,7 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.

@itemize @bullet
@item
-Added cast functions @code{SIGNED} and @code{UNSIGNED}.
+Added @code{CAST()} and @code{CONVERT()} functions.
@item
 Changed order of how keys are created in tables.
@item
--- a/mysql-test/r/bigint.result
+++ b/mysql-test/r/bigint.result
@ -55,12 +55,12 @@ select min(big),max(big),max(big)-1 from t1 group by a;
 min(big)	max(big)	max(big)-1
 -1	9223372036854775807	9223372036854775806
 drop table t1;
-select UNSIGNED 1-2;
-UNSIGNED 1-2
+select CAST(1-2 AS UNSIGNED);
+CAST(1-2 AS UNSIGNED)
 18446744073709551615
-select SIGNED (UNSIGNED 1-2);
-SIGNED (UNSIGNED 1-2)
+select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER);
+CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER)
 -1
-select UNSIGNED '-1';
-UNSIGNED '-1'
+select CONVERT('-1',UNSIGNED);
+CONVERT('-1',UNSIGNED)
 18446744073709551615
--- a/mysql-test/r/create.result
+++ b/mysql-test/r/create.result
@ -87,7 +87,7 @@ d	bigint(17)			0
 e	double(18,1)			0.0	
 f	bigint(17)			0	
 drop table t2;
-create table t2 select DATE "2001-12-29" as d, TIME "20:45:11" as t, DATETIME "2001-12-29  20:45:11" as dt;
+create table t2 select CAST("2001-12-29" AS DATE) as d, CAST("20:45:11" AS TIME) as t, CAST("2001-12-29  20:45:11" AS DATETIME) as dt;
 describe t2;
 Field	Type	Null	Key	Default	Extra
 d	date			0000-00-00	
--- a/mysql-test/r/variables.result
+++ b/mysql-test/r/variables.result
@ -1,3 +1,4 @@
+drop table if exists t1;
 set @`test`=1,@TEST=3,@select=2,@t5=1.23456;
 select @test,@`select`,@TEST,@not_used;
@test	@`select`	@TEST	@not_used
@ -24,14 +25,22 @@ select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
 select @t5;
@t5
 1.23456
+CREATE TABLE t1 (c_id INT(4) NOT NULL, c_name CHAR(20), c_country CHAR(3), PRIMARY KEY(c_id));
+INSERT INTO t1 VALUES (1,'Bozo','USA'),(2,'Ronald','USA'),(3,'Kinko','IRE'),(4,'Mr. Floppy','GB');
+SELECT @min_cid:=min(c_id), @max_cid:=max(c_id) from t1;
@min_cid:=min(c_id)	@max_cid:=max(c_id)
 1	4
+SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid;
 c_id	c_name	c_country
 1	Bozo	USA
 4	Mr. Floppy	GB
+SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid OR c_id=666;
 c_id	c_name	c_country
 1	Bozo	USA
 4	Mr. Floppy	GB
+ALTER TABLE t1 DROP PRIMARY KEY;
+select * from t1 where c_id=@min_cid OR c_id=@max_cid;
 c_id	c_name	c_country
 1	Bozo	USA
 4	Mr. Floppy	GB
+drop table t1;
--- a/mysql-test/t/bigint.test
+++ b/mysql-test/t/bigint.test
@ -30,6 +30,6 @@ select min(big),max(big),max(big)-1 from t1;
 select min(big),max(big),max(big)-1 from t1 group by a;
 drop table t1;

-select UNSIGNED 1-2;
-select SIGNED (UNSIGNED 1-2);
-select UNSIGNED '-1';
+select CAST(1-2 AS UNSIGNED);
+select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER);
+select CONVERT('-1',UNSIGNED);
--- a/mysql-test/t/create.test
+++ b/mysql-test/t/create.test
@ -78,6 +78,6 @@ drop table t2;
 create table t2 select now() as a , curtime() as b, curdate() as c , 1+1 as d , 1.0 + 1 as e , 33333333333333333 + 3 as f;
 describe t2;
 drop table t2;
-create table t2 select DATE "2001-12-29" as d, TIME "20:45:11" as t, DATETIME "2001-12-29  20:45:11" as dt;
+create table t2 select CAST("2001-12-29" AS DATE) as d, CAST("20:45:11" AS TIME) as t, CAST("2001-12-29  20:45:11" AS DATETIME) as dt;
 describe t2;
 drop table t1,t2;
--- a/sql/item_create.cc
+++ b/sql/item_create.cc
@ -393,3 +393,18 @@ Item *create_wait_for_master_pos(Item* a, Item* b)
  current_thd->safe_to_cache_query=0;
  return new Item_master_pos_wait(a, b);
 }
+
+Item *create_func_cast(Item *a, Item_cast cast_type)
+{
+  Item *res;
+  LINT_INIT(res);
+  switch (cast_type) {
+  case ITEM_CAST_BINARY: 	res= new Item_func_binary(a); break;
+  case ITEM_CAST_SIGNED_INT:	res= new Item_func_signed(a); break;
+  case ITEM_CAST_UNSIGNED_INT:  res= new Item_func_unsigned(a); break;
+  case ITEM_CAST_DATE:		res= new Item_date_typecast(a); break;
+  case ITEM_CAST_TIME:		res= new Item_time_typecast(a); break;
+  case ITEM_CAST_DATETIME:	res= new Item_datetime_typecast(a); break;
+  }
+  return res;
+}
--- a/sql/item_func.h
+++ b/sql/item_func.h
@ -952,3 +952,12 @@ public:
  const char *func_name() const { return "match_bool"; }
 };

+/* For type casts */
+
+enum Item_cast
+{
+  ITEM_CAST_BINARY, ITEM_CAST_SIGNED_INT, ITEM_CAST_UNSIGNED_INT,
+  ITEM_CAST_DATE, ITEM_CAST_TIME, ITEM_CAST_DATETIME
+};
+
+Item *create_func_cast(Item *a, Item_cast cast_type);
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@ -1123,3 +1123,13 @@ longlong Item_extract::val_int()
  }
  return 0;					// Impossible
 }
+
+
+void Item_typecast::print(String *str)
+{
+  str->append("CASE(");
+  args[0]->print(str);
+  str->append(" AS ");
+  str->append(func_name());
+  str->append(')');
+}
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@ -414,14 +414,21 @@ class Item_extract :public Item_int_func
  void fix_length_and_dec();
 };

-class Item_date_typecast :public Item_str_func
+class Item_typecast :public Item_str_func
 {
 public:
-  Item_date_typecast(Item *a) :Item_str_func(a) {}
-  const char *func_name() const { return "date_typecast"; }
+  Item_typecast(Item *a) :Item_str_func(a) {}
  String *val_str(String *a) { return (args[0]->val_str(a)); }
  void fix_length_and_dec() { max_length=args[0]->max_length; }
-  void print(String *str) { print_op(str); }
+  void print(String *str);
+};
+
+
+class Item_date_typecast :public Item_typecast
+{
+public:
+  Item_date_typecast(Item *a) :Item_typecast(a) {}
+  const char *func_name() const { return "date"; }
  void make_field(Send_field *tmp_field)
  {
    init_make_field(tmp_field,FIELD_TYPE_DATE);
@ -433,14 +440,11 @@ public:
  }  
 };

-class Item_time_typecast :public Item_str_func
+class Item_time_typecast :public Item_typecast
 {
 public:
-  Item_time_typecast(Item *a) :Item_str_func(a) {}
-  const char *func_name() const { return "time_typecast"; }
-  String *val_str(String *a) { return (args[0]->val_str(a)); }
-  void fix_length_and_dec() { max_length=args[0]->max_length; }
-  void print(String *str) { print_op(str); }
+  Item_time_typecast(Item *a) :Item_typecast(a) {}
+  const char *func_name() const { return "time"; }
  void make_field(Send_field *tmp_field)
  {
    init_make_field(tmp_field,FIELD_TYPE_TIME);
@ -452,14 +456,11 @@ public:
  }  
 };

-class Item_datetime_typecast :public Item_str_func
+class Item_datetime_typecast :public Item_typecast
 {
 public:
-  Item_datetime_typecast(Item *a) :Item_str_func(a) {}
-  const char *func_name() const { return "datetime_typecast"; }
-  String *val_str(String *a) { return (args[0]->val_str(a)); }
-  void fix_length_and_dec() { max_length=args[0]->max_length; }
-  void print(String *str) { print_op(str); }
+  Item_datetime_typecast(Item *a) :Item_typecast(a) {}
+  const char *func_name() const { return "datetime"; }
  void make_field(Send_field *tmp_field)
  {
    init_make_field(tmp_field,FIELD_TYPE_DATETIME);
--- a/sql/lex.h
+++ b/sql/lex.h
@ -228,7 +228,7 @@ static SYMBOL symbols[] = {
  { "MASTER_SERVER_ID",           SYM(MASTER_SERVER_ID_SYM),0,0},
  { "MASTER_USER",           SYM(MASTER_USER_SYM),0,0},
  { "MAX_ROWS",		SYM(MAX_ROWS),0,0},
-  { "MAXIMUM",		SYM(MAXIMUM),0,0},
+  { "MAX_QUERIES_PER_HOUR", SYM(MAX_QUERIES_PER_HOUR), 0,0},
  { "MATCH",		SYM(MATCH),0,0},
  { "MEDIUMBLOB",	SYM(MEDIUMBLOB),0,0},
  { "MEDIUMTEXT",	SYM(MEDIUMTEXT),0,0},
@ -242,7 +242,6 @@ static SYMBOL symbols[] = {
  { "MODE",		SYM(MODE_SYM),0,0},
  { "MODIFY",		SYM(MODIFY_SYM),0,0},
  { "MONTH",		SYM(MONTH_SYM),0,0},
-  { "MQH",		SYM(MQH_SYM),0,0},
  { "MRG_MYISAM",	SYM(MERGE_SYM),0,0},
  { "MYISAM",		SYM(MYISAM_SYM),0,0},
  { "NATURAL",		SYM(NATURAL),0,0},
@ -267,7 +266,6 @@ static SYMBOL symbols[] = {
  { "PACK_KEYS",	SYM(PACK_KEYS_SYM),0,0},
  { "PARTIAL",		SYM(PARTIAL),0,0},
  { "PASSWORD",		SYM(PASSWORD),0,0},
-  { "PER",		SYM(PER_SYM),0,0},
  { "PURGE",		SYM(PURGE),0,0},
  { "PRECISION",	SYM(PRECISION),0,0},
  { "PREV",		SYM(PREV_SYM),0,0},
@ -276,7 +274,6 @@ static SYMBOL symbols[] = {
  { "PROCESS"	,	SYM(PROCESS),0,0},
  { "PROCESSLIST",	SYM(PROCESSLIST_SYM),0,0},
  { "PRIVILEGES",	SYM(PRIVILEGES),0,0},
-  { "QUERIES",	        SYM(QUERIES),0,0},
  { "QUERY",		SYM(QUERY_SYM),0,0},
  { "QUICK",	        SYM(QUICK),0,0},
  { "RAID0",		SYM(RAID_0_SYM),0,0},
@ -305,7 +302,7 @@ static SYMBOL symbols[] = {
  { "SERIALIZABLE",	SYM(SERIALIZABLE_SYM),0,0},
  { "SESSION",		SYM(SESSION_SYM),0,0},
  { "SET",		SYM(SET),0,0},
-  { "SIGNED",		SYM(SIGNED),0,0},
+  { "SIGNED",		SYM(SIGNED_SYM),0,0},
  { "SHARE",		SYM(SHARE_SYM),0,0},
  { "SHOW",		SYM(SHOW),0,0},
  { "SHUTDOWN",		SYM(SHUTDOWN),0,0},
@ -397,6 +394,7 @@ static SYMBOL sql_functions[] = {
  { "BIT_COUNT",	SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_bit_count)},
  { "BIT_OR",		SYM(BIT_OR),0,0},
  { "BIT_AND",		SYM(BIT_AND),0,0},
+  { "CAST",		SYM(CAST_SYM),0,0},
  { "CEILING",		SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_ceiling)},
  { "CHAR_LENGTH",	SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_char_length)},
  { "CHARACTER_LENGTH", SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_char_length)},
@ -405,6 +403,7 @@ static SYMBOL sql_functions[] = {
  { "CONCAT_WS",	SYM(CONCAT_WS),0,0},
  { "CONNECTION_ID",	SYM(FUNC_ARG0),0,CREATE_FUNC(create_func_connection_id)},
  { "CONV",		SYM(FUNC_ARG3),0,CREATE_FUNC(create_func_conv)},
+  { "CONVERT",		SYM(CONVERT_SYM),0,0},
  { "COUNT",		SYM(COUNT_SYM),0,0},
  { "COS",		SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_cos)},
  { "COT",		SYM(FUNC_ARG1),0,CREATE_FUNC(create_func_cot)},
--- a/sql/mysql_priv.h
+++ b/sql/mysql_priv.h
@ -264,6 +264,7 @@ bool mysql_change_db(THD *thd,const char *name);
 void mysql_parse(THD *thd,char *inBuf,uint length);
 void mysql_init_select(LEX *lex);
 bool mysql_new_select(LEX *lex);
+void mysql_init_multi_delete(LEX *lex);
 void init_max_user_conn(void);
 void free_max_user_conn(void);
 pthread_handler_decl(handle_one_connection,arg);
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@ -2665,6 +2665,16 @@ mysql_new_select(LEX *lex)
  return 0;
 }

+void mysql_init_multi_delete(LEX *lex)
+{
+  lex->sql_command =  SQLCOM_DELETE_MULTI;
+  mysql_init_select(lex);
+  lex->select->select_limit=HA_POS_ERROR;
+  lex->auxilliary_table_list=lex->select_lex.table_list;
+  lex->select->table_list.elements=0; 
+  lex->select->table_list.first=0;
+  lex->select->table_list.next= (byte**) &(lex->select->table_list.first);
+}

 void
 mysql_parse(THD *thd,char *inBuf,uint length)
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@ -1,4 +1,4 @@
-/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+/* Copyright (C) 2000-2001 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@ -58,6 +58,7 @@ inline Item *or_or_concat(Item* A, Item* B)
  enum row_type row_type;
  enum ha_rkey_function ha_rkey_mode;
  enum enum_tx_isolation tx_isolation;
+  enum Item_cast cast_type;
  String *string;
  key_part_spec *key_part;
  TABLE_LIST *table_list;
@ -81,11 +82,6 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token NEXT_SYM
 %token PREV_SYM
 %token SQL_CALC_FOUND_ROWS
-%token QUERIES
-%token MQH_SYM
-%token PER_SYM
-%token MAXIMUM
-

 %token	EQ
 %token	EQUAL_SYM
@ -161,6 +157,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	BY
 %token	CACHE_SYM
 %token	CASCADE
+%token	CAST_SYM
 %token	CHECKSUM_SYM
 %token	CHECK_SYM
 %token	CIPHER
@ -169,6 +166,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	COLUMN_SYM
 %token	CONCURRENT
 %token	CONSTRAINT
+%token	CONVERT_SYM
 %token	DATABASES
 %token	DATA_SYM
 %token	DEFAULT
@ -243,6 +241,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token  MASTER_SERVER_ID_SYM
 %token	MATCH
 %token	MAX_ROWS
+%token  MAX_QUERIES_PER_HOUR
 %token	MEDIUM_SYM
 %token	MERGE_SYM
 %token	MIN_ROWS
@ -356,7 +355,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	PRECISION
 %token  QUICK
 %token	REAL
-%token	SIGNED
+%token	SIGNED_SYM
 %token	SMALLINT
 %token	STRING_SYM
 %token	TEXT_SYM
@ -487,11 +486,6 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %left	NEG '~'
 %right	NOT
 %right	BINARY
-%right  SIGNED
-%right  UNSIGNED
-%right  DATE_SYM
-%right  TIME_SYM
-%right  DATETIME

 %type <lex_str>
 	IDENT TEXT_STRING REAL_NUM FLOAT_NUM NUM LONG_NUM HEX_NUM LEX_HOSTNAME
@ -556,6 +550,8 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);

 %type <ha_rkey_mode> handler_rkey_mode

+%type <cast_type> cast_type
+
 %type <udf_type> udf_func_type

 %type <symbol> FUNC_ARG0 FUNC_ARG1 FUNC_ARG2 FUNC_ARG3 keyword
@ -1020,7 +1016,7 @@ field_opt_list:
 	| field_option {}

 field_option:
-	SIGNED		{}
+	SIGNED_SYM	{}
 	| UNSIGNED	{ Lex->type|= UNSIGNED_FLAG;}
 	| ZEROFILL	{ Lex->type|= UNSIGNED_FLAG | ZEROFILL_FLAG; }

@ -1607,14 +1603,11 @@ simple_expr:
        | MATCH ident_list_arg AGAINST '(' expr IN_SYM BOOLEAN_SYM MODE_SYM ')'
          { Select->ftfunc_list.push_back((Item_func_match *)
                   ($$=new Item_func_match_bool(*$2,$5))); }
-	| BINARY expr %prec NEG		{ $$= new Item_func_binary($2); }
-	| SIGNED expr %prec NEG		{ $$= new Item_func_signed($2); }
-	| UNSIGNED expr %prec NEG	{ $$= new Item_func_unsigned($2); }
-	| DATE_SYM  expr 		{ $$= new Item_date_typecast($2); }
-	| TIME_SYM  expr		{ $$= new Item_time_typecast($2); }
-	| DATETIME  expr		{ $$= new Item_datetime_typecast($2); }
+	| BINARY expr %prec NEG	{ $$= new Item_func_binary($2); }
+	| CAST_SYM '(' expr AS cast_type ')'  { $$= create_func_cast($3, $5); }
 	| CASE_SYM opt_expr WHEN_SYM when_list opt_else END
 	  { $$= new Item_func_case(* $4, $2, $5 ) }
+	| CONVERT_SYM '(' expr ',' cast_type ')'  { $$= create_func_cast($3, $5); }
 	| FUNC_ARG0 '(' ')'
 	  { $$= ((Item*(*)(void))($1.symbol->create_func))();}
 	| FUNC_ARG1 '(' expr ')'
@ -1886,6 +1879,16 @@ in_sum_expr:
 	  $$=$2;
 	}

+cast_type:
+	BINARY 			{ $$=ITEM_CAST_BINARY; }
+	| SIGNED_SYM		{ $$=ITEM_CAST_SIGNED_INT; }
+	| SIGNED_SYM INT_SYM	{ $$=ITEM_CAST_SIGNED_INT; }
+	| UNSIGNED		{ $$=ITEM_CAST_UNSIGNED_INT; }
+	| UNSIGNED INT_SYM	{ $$=ITEM_CAST_UNSIGNED_INT; }
+	| DATE_SYM		{ $$=ITEM_CAST_DATE; }
+	| TIME_SYM		{ $$=ITEM_CAST_TIME; }
+	| DATETIME		{ $$=ITEM_CAST_DATETIME; }
+
 expr_list:
 	{ Select->expr_list.push_front(new List<Item>); }
 	expr_list2
@ -2113,9 +2116,10 @@ opt_order_clause:
 order_clause:
 	ORDER_SYM BY 
        { 
-	  if (Lex->sql_command==SQLCOM_MULTI_UPDATE)
+	  LEX *lex=Lex;
+	  if (lex->sql_command == SQLCOM_MULTI_UPDATE)
 	    YYABORT;
-	  Select->sort_default=1; 
+	  lex->select->sort_default=1;
 	} order_list

 order_list:
@ -2135,7 +2139,8 @@ limit_clause:
 	| LIMIT ULONG_NUM
 	  {
 	    SELECT_LEX *sel=Select;
-	    sel->select_limit= $2; sel->offset_limit=0L;
+	    sel->select_limit= $2;
+	    sel->offset_limit=0L;
 	  }
 	| LIMIT ULONG_NUM ',' ULONG_NUM
 	  {
@ -2146,9 +2151,10 @@ limit_clause:
 delete_limit_clause:
 	/* empty */
 	{
-	  if (Lex->sql_command==SQLCOM_MULTI_UPDATE)
+	  LEX *lex=Lex;
+	  if (lex->sql_command == SQLCOM_MULTI_UPDATE)
 	    YYABORT;
-	  Select->select_limit= HA_POS_ERROR;
+	  lex->select->select_limit= HA_POS_ERROR;
 	}
 	| LIMIT ulonglong_num
 	{ Select->select_limit= (ha_rows) $2; }
@ -2438,42 +2444,11 @@ delete:
 single_multi:
 	FROM table_name where_clause opt_order_clause delete_limit_clause {}
 	| table_wild_list
-	  {
-	    LEX *lex=Lex;
-	    lex->sql_command =  SQLCOM_DELETE_MULTI;
-            mysql_init_select(lex);
-            lex->select->select_limit=HA_POS_ERROR;
-            lex->auxilliary_table_list.elements=0; 
-            lex->auxilliary_table_list.first=0;
-            lex->auxilliary_table_list.next= (byte**) &(lex->auxilliary_table_list.first);
-          }
-          FROM 
-          {
-	    LEX *lex=Lex;
-	    lex->auxilliary_table_list=lex->select_lex.table_list;
-	    lex->select->table_list.elements=0; 
-            lex->select->table_list.first=0;
-            lex->select->table_list.next= (byte**) &(lex->select->table_list.first);
-	  } join_table_list where_clause
-        | FROM  table_wild_list
-	  {
-	    LEX *lex=Lex;
-	    lex->sql_command =  SQLCOM_DELETE_MULTI;
-            mysql_init_select(lex);
-            lex->select->select_limit=HA_POS_ERROR;
-            lex->auxilliary_table_list.elements=0; 
-            lex->auxilliary_table_list.first=0;
-            lex->auxilliary_table_list.next= (byte**) &(lex->auxilliary_table_list.first);
-          }
-          USING 
-          {
-	    LEX *lex=Lex;
-	    lex->auxilliary_table_list=lex->select_lex.table_list;
-	    lex->select->table_list.elements=0; 
-            lex->select->table_list.first=0;
-            lex->select->table_list.next= (byte**) &(lex->select->table_list.first);
-	  } join_table_list where_clause
-
+	  { mysql_init_multi_delete(Lex); }
+	   FROM join_table_list where_clause
+	| FROM table_wild_list
+	  { mysql_init_multi_delete(Lex); }
+	  USING join_table_list where_clause

 table_wild_list:
 	  table_wild_one {}
@ -3019,6 +2994,7 @@ keyword:
 	| MASTER_USER_SYM	{}
 	| MASTER_PASSWORD_SYM	{}
 	| MASTER_CONNECT_RETRY_SYM	{}
+	| MAX_QUERIES_PER_HOUR  {}
 	| MEDIUM_SYM		{}
 	| MERGE_SYM		{}
 	| MINUTE_SYM		{}
@ -3058,6 +3034,7 @@ keyword:
 	| SECOND_SYM		{}
 	| SERIALIZABLE_SYM	{}
 	| SESSION_SYM		{}
+	| SIGNED_SYM		{}
 	| SHARE_SYM		{}
 	| SHUTDOWN		{}
        | SLAVE		        {}
@ -3607,17 +3584,13 @@ grant_option:

 mqh_option:
 	/* empty */ {}
-        | AND WITH short_or_long_one EQ NUM
+        | AND WITH MAX_QUERIES_PER_HOUR EQ NUM
        { 
 	  Lex->mqh=atoi($5.str);
 	  if (Lex->mqh > 65535)
 	    YYABORT;
 	}

-short_or_long_one:
-	MQH_SYM
-        | MAXIMUM QUERIES PER_SYM HOUR_SYM
-
 begin:
 	BEGIN_SYM   { Lex->sql_command = SQLCOM_BEGIN;} opt_work