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Item::print(): remove redundant parentheses

by introducing new Item::precedence() method and using it
to decide whether parentheses are required
This commit is contained in:
Sergei Golubchik
2016-11-27 19:50:10 +01:00
parent 1db438c833
commit 180065ebb0
188 changed files with 2684 additions and 2553 deletions

View File

@ -587,15 +587,15 @@ select _latin1'B' in (_latin1'a',_latin1'b' collate latin1_bin);
_latin1'B' in (_latin1'a',_latin1'b' collate latin1_bin)
0
select _latin2'B' in (_latin1'a',_latin1'b');
ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
ERROR HY000: Illegal mix of collations (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'in'
select _latin1'B' in (_latin2'a',_latin1'b');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE) for operation 'in'
select _latin1'B' in (_latin1'a',_latin2'b');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE) for operation ' IN '
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE), (latin1_swedish_ci,COERCIBLE), (latin2_general_ci,COERCIBLE) for operation 'in'
select _latin1'B' COLLATE latin1_general_ci in (_latin1'a' COLLATE latin1_bin,_latin1'b');
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_bin,EXPLICIT), (latin1_swedish_ci,COERCIBLE) for operation ' IN '
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_bin,EXPLICIT), (latin1_swedish_ci,COERCIBLE) for operation 'in'
select _latin1'B' COLLATE latin1_general_ci in (_latin1'a',_latin1'b' COLLATE latin1_bin);
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_swedish_ci,COERCIBLE), (latin1_bin,EXPLICIT) for operation ' IN '
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_swedish_ci,COERCIBLE), (latin1_bin,EXPLICIT) for operation 'in'
select collation(bin(130)), coercibility(bin(130));
collation(bin(130)) coercibility(bin(130))
latin1_swedish_ci 4
@ -841,7 +841,7 @@ explain extended select 'mood' sounds like 'mud';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select (soundex('mood') = soundex('mud')) AS `'mood' sounds like 'mud'`
Note 1003 select soundex('mood') = soundex('mud') AS `'mood' sounds like 'mud'`
explain extended select aes_decrypt(aes_encrypt('abc','1'),'1');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
@ -921,7 +921,7 @@ explain extended select FIELD('b' COLLATE latin1_bin,'A','B');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select field(('b' collate latin1_bin),'A','B') AS `FIELD('b' COLLATE latin1_bin,'A','B')`
Note 1003 select field('b' collate latin1_bin,'A','B') AS `FIELD('b' COLLATE latin1_bin,'A','B')`
explain extended select FIND_IN_SET(_latin1'B', _latin1'a,b,c,d');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
@ -976,7 +976,7 @@ explain extended select quote(1/0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select quote((1 / 0)) AS `quote(1/0)`
Note 1003 select quote(1 / 0) AS `quote(1/0)`
explain extended select crc32("123");
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
@ -1290,27 +1290,27 @@ EXPLAIN EXTENDED SELECT s FROM t1 WHERE TRIM(s) > 'ab';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where (trim(`test`.`t1`.`s`) > 'ab')
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where trim(`test`.`t1`.`s`) > 'ab'
EXPLAIN EXTENDED SELECT s FROM t1 WHERE TRIM('y' FROM s) > 'ab';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where (trim(both 'y' from `test`.`t1`.`s`) > 'ab')
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where trim(both 'y' from `test`.`t1`.`s`) > 'ab'
EXPLAIN EXTENDED SELECT s FROM t1 WHERE TRIM(LEADING 'y' FROM s) > 'ab';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where (trim(leading 'y' from `test`.`t1`.`s`) > 'ab')
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where trim(leading 'y' from `test`.`t1`.`s`) > 'ab'
EXPLAIN EXTENDED SELECT s FROM t1 WHERE TRIM(TRAILING 'y' FROM s) > 'ab';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where (trim(trailing 'y' from `test`.`t1`.`s`) > 'ab')
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where trim(trailing 'y' from `test`.`t1`.`s`) > 'ab'
EXPLAIN EXTENDED SELECT s FROM t1 WHERE TRIM(BOTH 'y' FROM s) > 'ab';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where (trim(both 'y' from `test`.`t1`.`s`) > 'ab')
Note 1003 select `test`.`t1`.`s` AS `s` from `test`.`t1` where trim(both 'y' from `test`.`t1`.`s`) > 'ab'
DROP TABLE t1;
create table t1(f1 varchar(4));
explain extended select encode(f1,'zxcv') as 'enc' from t1;
@ -1400,7 +1400,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 const PRIMARY PRIMARY 12 const 1 100.00 Using index
1 SIMPLE t1 ref code code 13 const 3 100.00 Using where; Using index
Warnings:
Note 1003 select `test`.`t1`.`code` AS `code`,'a12' AS `id` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`code` = 'a12') and (length(`test`.`t1`.`code`) = 5))
Note 1003 select `test`.`t1`.`code` AS `code`,'a12' AS `id` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`code` = 'a12' and length(`test`.`t1`.`code`) = 5
DROP TABLE t1,t2;
select encode(NULL, NULL);
encode(NULL, NULL)
@ -4575,7 +4575,7 @@ SELECT * FROM t1 WHERE a=18446744073709551615 AND FORMAT(a,0)='18,446,744,073,70
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 18446744073709551615) and (format(`test`.`t1`.`a`,0) = '18,446,744,073,709,551,615'))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 18446744073709551615 and format(`test`.`t1`.`a`,0) = '18,446,744,073,709,551,615'
DROP TABLE t1;
#
# Bug#58081 Duplicate entry error when doing GROUP BY