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MDEV-8741 Equal field propagation leaves some remainders after simplifying WH ERE zerofill_column=2010 AND zerofill_column>=2010

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This commit is contained in:
Alexander Barkov
2015-09-09 08:11:43 +04:00
parent 4cb6edba78
commit 3fcd84c289
12 changed files with 157 additions and 36 deletions
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4
mysql-test/r/null.result
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@ -1369,7 +1369,7 @@ EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2010 AND NULLIF(10.1,a) IS NULL;
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` = 2010) and 1)
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 2010)
SELECT * FROM t1 WHERE a=2010 AND CASE WHEN 10.1=a THEN NULL ELSE 10.1 END IS NULL;
a
2010
@ -1377,7 +1377,7 @@ EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2010 AND CASE WHEN 10.1=a THEN NULL EL
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` = 2010) and 1)
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 2010)
DROP TABLE t1;
# Two warnings expected
CREATE TABLE t1 AS SELECT