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| author | gkodinov/kgeorge@magare.gmz <> | 2007-05-04 18:06:06 +0300 |
|---|---|---|
| committer | gkodinov/kgeorge@magare.gmz <> | 2007-05-04 18:06:06 +0300 |
| commit | 306371a8508606642bd606aa68b41ad9e3e1fed5 (patch) | |
| tree | 29f385f4eeb8af49da1b7ee638a6f077dbd88785 /mysql-test/r/union.result | |
| parent | 19b9c7a8cda743d45464c5b1fbd571de073e26ea (diff) | |
| download | mariadb-git-306371a8508606642bd606aa68b41ad9e3e1fed5.tar.gz | |
bug #27531: 5.1 part of the fix:
- added join cache indication in EXPLAIN (Extra column).
- prefer filesort over full scan over
index for ORDER BY (because it's faster).
- when switching from REF to RANGE because
RANGE uses longer key turn off sort on
the head table only as the resulting
RANGE access is a candidate for join cache
and we don't want to disable it by sorting
on the first table only.
Diffstat (limited to 'mysql-test/r/union.result')
| -rw-r--r-- | mysql-test/r/union.result | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mysql-test/r/union.result b/mysql-test/r/union.result index 275f3357c65..acf237bf125 100644 --- a/mysql-test/r/union.result +++ b/mysql-test/r/union.result @@ -499,7 +499,7 @@ a b explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t2.a from t1,t2 where t1.a=t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables -2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index +2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index; Using join cache 2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL explain (select * from t1 where a=1) union (select * from t1 where b=1); |