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| author | timour@askmonty.org <timour@askmonty.org> | 2013-10-18 11:45:25 +0300 |
|---|---|---|
| committer | timour@askmonty.org <timour@askmonty.org> | 2013-10-18 11:45:25 +0300 |
| commit | afed809297ec43d7825b607b6ebadbabe4f63c2a (patch) | |
| tree | f1d181866a058711fd214f566cc8eb56dc2e2b6f /mysql-test/r/range.result | |
| parent | adbb4393586d46257a7d483212748df66261dca8 (diff) | |
| download | mariadb-git-afed809297ec43d7825b607b6ebadbabe4f63c2a.tar.gz | |
MDEV-5123 Remove duplicated conditions pushed both to join_tab->select_cond and join_tab->cache_select->cond for blocked joins.
BNL and BNLH joins pre-filter the records from a joined table via JOIN_TAB::cache_select->cond.
There is no need to re-evaluate the same conditions via JOIN_TAB::select_cond. This patch removes
the duplicated conditions from the top-level conjuncts of each pushed condition.
The added "Using where" in few EXPLAINs is due to taking into account tab->cache_select->cond
in addition to tab->select_cond in JOIN::save_explain_data_intern.
Diffstat (limited to 'mysql-test/r/range.result')
| -rw-r--r-- | mysql-test/r/range.result | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mysql-test/r/range.result b/mysql-test/r/range.result index d41bfaa2c67..e169dcb40b0 100644 --- a/mysql-test/r/range.result +++ b/mysql-test/r/range.result @@ -221,27 +221,27 @@ update t1 set y=x; explain select * from t1, t1 t2 where t1.y = 8 and t2.x between 7 and t1.y+0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using join buffer (flat, BNL join) +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 8 and t2.x >= 7 and t2.x <= t1.y+0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using join buffer (flat, BNL join) +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x between t1.y-1 and t1.y+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using join buffer (flat, BNL join) +1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= t1.y-1 and t2.x <= t1.y+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using join buffer (flat, BNL join) +1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 0 and t1.y; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using join buffer (flat, BNL join) +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 0 and t2.x <= t1.y; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using join buffer (flat, BNL join) +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using where; Using join buffer (flat, BNL join) explain select count(*) from t1 where x in (1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref x x 5 const 1 Using index |