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| author | Sergey Petrunya <psergey@askmonty.org> | 2011-04-02 14:04:45 +0400 |
|---|---|---|
| committer | Sergey Petrunya <psergey@askmonty.org> | 2011-04-02 14:04:45 +0400 |
| commit | 997445bc8eb578355b41abc3f4e42f579f900043 (patch) | |
| tree | 1224e5382ffa0b158db9d4d109114ba28b6c361d /mysql-test/r/null.result | |
| parent | 886d84d6d15f17d91a37453875b386167a9fef76 (diff) | |
| download | mariadb-git-997445bc8eb578355b41abc3f4e42f579f900043.tar.gz | |
Make EXPLAIN better at displaying MRR/BKA:
- "Using MRR" is no longer shown with range access.
- Instead, both range and BKA accesses will show one of the following:
= "Rowid-ordered scan"
= "Key-ordered scan"
= "Key-ordered Rowid-ordered scan"
depending on whether DS-MRR implementation will do scan keys in order, rowids in order,
or both.
- The patch also introduces a way for other storage engines/MRR implementations to
pass information to EXPLAIN output about the properties of employed MRR scans.
Diffstat (limited to 'mysql-test/r/null.result')
| -rw-r--r-- | mysql-test/r/null.result | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mysql-test/r/null.result b/mysql-test/r/null.result index 7cadeb81c2c..54729bd6937 100644 --- a/mysql-test/r/null.result +++ b/mysql-test/r/null.result @@ -148,10 +148,10 @@ insert into t1 values (7,7), (8,8), (9,9), (10,10), (11,11), (12,12); explain select * from t1 where a between 2 and 3; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range idx idx 4 NULL 2 Using index condition; Using MRR +1 SIMPLE t1 range idx idx 4 NULL 2 Using index condition; Rowid-ordered scan explain select * from t1 where a between 2 and 3 or b is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range idx idx 4 NULL 2 Using index condition; Using MRR +1 SIMPLE t1 range idx idx 4 NULL 2 Using index condition; Rowid-ordered scan drop table t1; select cast(NULL as signed); cast(NULL as signed) |