diff options
Diffstat (limited to 'mysql-test/main/order_by_optimizer.result')
| -rw-r--r-- | mysql-test/main/order_by_optimizer.result | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mysql-test/main/order_by_optimizer.result b/mysql-test/main/order_by_optimizer.result new file mode 100644 index 00000000..8f128552 --- /dev/null +++ b/mysql-test/main/order_by_optimizer.result @@ -0,0 +1,30 @@ +drop table if exists t0,t1,t2,t3; +# +# MDEV-7885: EXPLAIN shows wrong info for ORDER BY query +# +create table t0(a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1(a int); +insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C; +create table t2 (key1 int, col1 int, key(key1)); +insert into t2 select a,a from t0; +insert into t2 select 15,15 from t1; +alter table t2 add key2 int, add key(key2); +# This must show "Using filesort": +explain +select * from t2 ignore index for order by (key1) where col1<0 order by key1 limit 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1010 Using where; Using filesort +drop table t0, t1, t2; +# +# MDEV-8857: [Upstream too] EXPLAIN incorrectly shows Distinct for tables using join buffer +# +create table t0(a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1 (a int, filler char(200), key(a)); +insert into t1 select A.a + B.a* 10, 'AAAAAAAAAAAAAAAAAAAA' from t0 A, t0 B where B.a in (0,1); +explain select distinct A.a from t0 A, t1 B where A.a+B.a> 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE A ALL NULL NULL NULL NULL 10 Using temporary +1 SIMPLE B index NULL a 5 NULL 20 Using where; Using index; Using join buffer (flat, BNL join) +drop table t0, t1; |