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| author | Alexander Barkov <bar@mariadb.com> | 2018-07-19 09:55:19 +0400 |
|---|---|---|
| committer | Alexander Barkov <bar@mariadb.com> | 2018-07-19 09:55:51 +0400 |
| commit | ab58493db22d870cb6a470d6b0551cfc70dd09f3 (patch) | |
| tree | 3f9394115673ae87a2dbfdf3e8ea0428a8dbddb5 /mysql-test/include/ctype_mdev13118.inc | |
| parent | ada54101a7185782657813c553907f61f2a35faf (diff) | |
| download | mariadb-git-ab58493db22d870cb6a470d6b0551cfc70dd09f3.tar.gz | |
MDEV-13118 Wrong results with LOWER and UPPER and subquery
This problem is similar to MDEV-10306.
1. Fixing Item_str_conv::val_str(String *str) to return the result in "str",
and to use tmp_value only as a temporary buffer for args[0]->val_str().
The new code version now guarantees that the result is always returned in
"str". The trick with copy_if_not_alloced() is not used any more.
2. The change #1 revealed the same problem in SUBSTRING_INDEX(),
so some tests with combinations of UPPER()/LOWER() and SUBSTRING_INDEX()
started to fail. Fixing Item_func_substr_index::val_str() the same way,
to return the result in "str" and use tmp_value as a temporary buffer
for args[0]->val_str().
Diffstat (limited to 'mysql-test/include/ctype_mdev13118.inc')
| -rw-r--r-- | mysql-test/include/ctype_mdev13118.inc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mysql-test/include/ctype_mdev13118.inc b/mysql-test/include/ctype_mdev13118.inc new file mode 100644 index 00000000000..efcb57299df --- /dev/null +++ b/mysql-test/include/ctype_mdev13118.inc @@ -0,0 +1,15 @@ +--echo # +--echo # MDEV-13118 Wrong results with LOWER and UPPER and subquery +--echo # + +SET @save_optimizer_switch=@@optimizer_switch; +SET optimizer_switch=_latin1'derived_merge=on'; +CREATE TABLE t1 AS SELECT REPEAT('a', 10) AS t LIMIT 0; +SHOW CREATE TABLE t1; +INSERT INTO t1 VALUES ('abcdefghi'),('ABCDEFGHI'); +--sorted_result +SELECT CONCAT(t2,'-',t2) c2 FROM (SELECT LOWER(t) t2 FROM t1) sub; +--sorted_result +SELECT CONCAT(t2,'-',t2) c2 FROM (SELECT UPPER(t) t2 FROM t1) sub; +DROP TABLE t1; +SET optimizer_switch=@save_optimizer_switch; |