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authorunknown <gkodinov/kgeorge@macbook.gmz>2006-08-15 10:13:17 +0300
committerunknown <gkodinov/kgeorge@macbook.gmz>2006-08-15 10:13:17 +0300
commit3915c3d94c48a96fdc9163d0841ca33159fc3268 (patch)
tree18ad4fe06a22026db0a877fda9f1c2bf7f7da892 /mysql-test/r/compare.result
parent1cf65f311dbf09615bea443b041a78db34d7e2ea (diff)
downloadmariadb-git-3915c3d94c48a96fdc9163d0841ca33159fc3268.tar.gz
Bug #21159: Optimizer: wrong result after AND with different data types
Disable const propagation for Item_hex_string. This must be done because Item_hex_string->val_int() is not the same as (Item_hex_string->val_str() in BINARY column)->val_int(). We cannot simply disable the replacement in a particular context ( e.g. <bin_col> = <int_col> AND <bin_col> = <hex_string>) since Items don't know the context they are in and there are functions like IF (<hex_string>, 'yes', 'no'). Note that this will disable some valid cases as well (e.g. : <bin_col> = <hex_string> AND <bin_col2> = <bin_col>) but there's no way to distinguish the valid cases without having the Item's parent say something like : Item->set_context(Item::STRING_RESULT) and have all the Items that contain other Items do that consistently. mysql-test/r/compare.result: Bug #21159: Optimizer: wrong result after AND with different data types - test case mysql-test/t/compare.test: Bug #21159: Optimizer: wrong result after AND with different data types - test case sql/sql_select.cc: Bug #21159: Optimizer: wrong result after AND with different data types - disable const propagation for Item_hex_string.
Diffstat (limited to 'mysql-test/r/compare.result')
-rw-r--r--mysql-test/r/compare.result7
1 files changed, 7 insertions, 0 deletions
diff --git a/mysql-test/r/compare.result b/mysql-test/r/compare.result
index 6f667aabac0..da0ca8ddba1 100644
--- a/mysql-test/r/compare.result
+++ b/mysql-test/r/compare.result
@@ -42,3 +42,10 @@ CHAR(31) = '' '' = CHAR(31)
SELECT CHAR(30) = '', '' = CHAR(30);
CHAR(30) = '' '' = CHAR(30)
0 0
+create table t1 (a tinyint(1),b binary(1));
+insert into t1 values (0x01,0x01);
+select * from t1 where a=b;
+a b
+select * from t1 where a=b and b=0x01;
+a b
+drop table if exists t1;