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After constant row substitution the optimizer should call the method

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update_used_tables for the the where condition to update cached
indicators of constant subexpressions. It should be done before further
possible simplification of the where condition.

This change caused simplification of the executed where conditions 
in many test cases.
This commit is contained in:
Igor Babaev
2014-02-20 21:27:33 -08:00
parent 6ebaa4939e
commit 3e03c9eae9
17 changed files with 24 additions and 24 deletions
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2
mysql-test/r/func_regexp.result
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@ -52,7 +52,7 @@ explain extended select * from t1 where xxx regexp('is a test of some long text
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
Warnings:
Note 1003 select 'this is a test of some long text to see what happens' AS `xxx` from `test`.`t1` where ('this is a test of some long text to see what happens' regexp 'is a test of some long text to')
Note 1003 select 'this is a test of some long text to see what happens' AS `xxx` from `test`.`t1` where 1
select * from t1 where xxx regexp('is a test of some long text to ');
xxx
this is a test of some long text to see what happens