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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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4
mysql-test/r/explain.result
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@ -268,7 +268,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select 1 from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from dual
Note 1003 select (select 1 from `test`.`t2` where `test`.`t2`.`d` = NULL) AS `(SELECT 1 FROM t2 WHERE d = c)` from dual
DROP TABLE t1, t2;
#
# Bug#30302: Tables that were optimized away are printed in the
@ -288,7 +288,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select 1 AS `f1`,`test`.`t2`.`f2` AS `f2` from `test`.`t2` where (`test`.`t2`.`f2` = 1)
Note 1003 select 1 AS `f1`,`test`.`t2`.`f2` AS `f2` from `test`.`t2` where `test`.`t2`.`f2` = 1
drop table t1,t2;
#
# Bug #48419: another explain crash..