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MDEV-7001 Bad result for NOT NOT STRCMP('a','b') and NOT NOT NULLIF(2,3)

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The bug is not very important per se, but it was helpful to move
Item_func_strcmp out of Item_bool_func2 (to Item_int_func),
for the purposes of "MDEV-4912 Add a plugin to field types (column types)".
This commit is contained in:
Alexander Barkov
2014-11-02 01:08:09 +04:00
parent 4dec4e1175
commit d1ca1c1fae
7 changed files with 72 additions and 12 deletions
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17
mysql-test/r/func_test.result
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@ -320,3 +320,20 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (not((`test`.`t1`.`a` + 0)))
drop table t1;
#
# Start of 10.0 tests
#
#
# MDEV-7001 Bad result for NOT NOT STRCMP('a','b') and NOT NOT NULLIF(2,3)
#
SELECT NOT NOT strcmp('a','b');
NOT NOT strcmp('a','b')
1
EXPLAIN EXTENDED SELECT NOT NOT strcmp('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 (strcmp('a','b') <> 0) AS `NOT NOT strcmp('a','b')`
#
# End of 10.0 tests
#