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| author | Varun Gupta <varunraiko1803@gmail.com> | 2018-11-01 14:26:13 +0530 |
|---|---|---|
| committer | Varun Gupta <varunraiko1803@gmail.com> | 2018-11-01 14:27:24 +0530 |
| commit | e60cbbbda31d7a10e87c16313171b2036a4519c4 (patch) | |
| tree | 89f601857b1c6e0e861c801520cad389895d8080 /mysql-test/t/distinct.test | |
| parent | f8268f3cce4577c28ab62e53293556d05a74fb1a (diff) | |
| download | mariadb-git-10.2-mdev12575.tar.gz | |
MDEV-12575: Server crash in AGGR_OP::put_record or in JOIN_CACHE::free or Invalid write in JOIN::make_aggr_tables_info10.2-mdev12575
During the optimize state of a query, we come know that the result set
would atmost contain one row, then for such a query we don't need
to compute GROUP BY, ORDER BY and DISTINCT.
Diffstat (limited to 'mysql-test/t/distinct.test')
| -rw-r--r-- | mysql-test/t/distinct.test | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mysql-test/t/distinct.test b/mysql-test/t/distinct.test index c11f8b501bc..d41340c29fd 100644 --- a/mysql-test/t/distinct.test +++ b/mysql-test/t/distinct.test @@ -798,4 +798,22 @@ CREATE TABLE t1 (b1 BIT, b2 BIT, b3 BIT, b4 BIT , b5 BIT, b6 BIT); INSERT INTO t1 VALUES (1,0,0,1,0,1),(0,1,0,0,1,0); SELECT DISTINCT b1+'0', b2+'0', b3+'0', b4+'0', b5+'0', b6 +'0' FROM t1; DROP TABLE t1; + +--echo # +--echo # MDEV-12575: Server crash in AGGR_OP::put_record or in JOIN_CACHE::free +--echo # or Invalid write in JOIN::make_aggr_tables_info +--echo # + +CREATE TABLE t1 (pk INT PRIMARY KEY); +INSERT INTO t1 VALUES (1),(2); +explain +( SELECT DISTINCT 1 FROM t1 ORDER BY BENCHMARK(1, MIN(pk)) ) +UNION +( SELECT DISTINCT 1 FROM t1 ORDER BY BENCHMARK(1, MIN(pk)) ); + +( SELECT DISTINCT 1 FROM t1 ORDER BY BENCHMARK(1, MIN(pk)) ) +UNION +( SELECT DISTINCT 1 FROM t1 ORDER BY BENCHMARK(1, MIN(pk)) ); +drop table t1; + --echo End of 5.5 tests |