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Item::print(): remove redundant parentheses

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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
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8
mysql-test/r/func_like.result
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@ -5,12 +5,12 @@ explain extended select * from t1 where a like 'abc%';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 index a a 13 NULL 5 20.00 Using where; Using index
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` like 'abc%')
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` like 'abc%'
explain extended select * from t1 where a like concat('abc','%');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 index a a 13 NULL 5 20.00 Using where; Using index
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` like <cache>(concat('abc','%')))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` like <cache>(concat('abc','%'))
select * from t1 where a like "abc%";
a
abc
@ -224,7 +224,7 @@ EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=10.0 AND a LIKE 10.00;
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` = 10.0) and (`test`.`t1`.`a` like 10.00))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 10.0 and `test`.`t1`.`a` like 10.00
DROP TABLE t1;
#
# MDEV-8599 "WHERE varchar_field LIKE temporal_const" does not use range optimizer
@ -257,7 +257,7 @@ DROP TABLE t1;
create view v1 as select 'foo!' like 'foo!!', 'foo!' like 'foo!!' escape '!';
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select ('foo!' like 'foo!!') AS `'foo!' like 'foo!!'`,('foo!' like 'foo!!' escape '!') AS `'foo!' like 'foo!!' escape '!'` koi8r koi8r_general_ci
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select 'foo!' like 'foo!!' AS `'foo!' like 'foo!!'`,'foo!' like 'foo!!' escape '!' AS `'foo!' like 'foo!!' escape '!'` koi8r koi8r_general_ci
select * from v1;
'foo!' like 'foo!!' 'foo!' like 'foo!!' escape '!'
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