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Bug#22331: Wrong WHERE in EXPLAIN EXTENDED when all expressions were optimized

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away.

Additional fix for bug#22331. Now Item_field prints its value in the case of
the const field.
This commit is contained in:
evgen@moonbone.local
2007-03-10 00:29:02 +03:00
parent 999c1cdcc1
commit 04f5c46d5d
12 changed files with 49 additions and 25 deletions
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6
mysql-test/r/explain.result
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@ -64,7 +64,7 @@ explain extended select * from v1 where f2=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where 1
Note 1003 select '1' AS `f1`,'1' AS `f2` from `test`.`t1` where 1
explain extended select * from t1 where 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
@ -74,7 +74,7 @@ explain extended select * from t1 where 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where 1
Note 1003 select '1' AS `f1`,'1' AS `f2` from `test`.`t1` where 1
explain extended select * from t1 having 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
@ -84,6 +84,6 @@ explain extended select * from t1 having 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` having 1
Note 1003 select '1' AS `f1`,'1' AS `f2` from `test`.`t1` having 1
drop view v1;
drop table t1;