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Fixed bug #36488: regexp returns false matches, concatenating

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with previous rows.

The WHERE clause containing expression:
  CONCAT(empty_field1, empty_field2, ..., 'literal constant', ...)
    REGEXP 'regular expression'
may return wrong matches.

Optimization of the CONCAT function has been fixed.
This commit is contained in:
gshchepa/uchum@host.loc
2008-05-13 20:27:46 +05:00
parent 5eaa779436
commit ba18c0bfd9
3 changed files with 23 additions and 0 deletions
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10
mysql-test/t/func_concat.test
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@@ -68,3 +68,13 @@ create table t1(f1 varchar(6)) charset=utf8;
insert into t1 values ("123456");
select concat(f1, 2) a from t1 union select 'x' a from t1;
drop table t1;
#
# Bug #36488: regexp returns false matches, concatenating with previous rows
#
CREATE TABLE t1 (c1 varchar(100), c2 varchar(100));
INSERT INTO t1 VALUES ('',''), ('','First'), ('Random','Random');
SELECT * FROM t1 WHERE CONCAT(c1,' ',c2) REGEXP 'First.*';
DROP TABLE t1;
--echo # End of 5.0 tests