diff options
| author | Varun Gupta <varun.gupta@mariadb.com> | 2020-04-21 12:16:10 +0530 |
|---|---|---|
| committer | Varun Gupta <varun.gupta@mariadb.com> | 2020-05-01 15:17:10 +0530 |
| commit | 644d9f38b97b198ec356aadfc390e0fef97c53f0 (patch) | |
| tree | 841be926c58ac3b8689d856eb482c71f5fdb8bcd /mysql-test/suite/gcol | |
| parent | 7f9dc0d84aeef01747389a3ef074217acdcb2410 (diff) | |
| download | mariadb-git-644d9f38b97b198ec356aadfc390e0fef97c53f0.tar.gz | |
MDEV-21480: Unique key using ref access though eq_ref access can be used
For a unique key if all the keyparts are NOT NULL or the predicates involving
the keyparts is NULL rejecting, then we can use EQ_REF access instead of ref
access with the unique key
Diffstat (limited to 'mysql-test/suite/gcol')
| -rw-r--r-- | mysql-test/suite/gcol/r/gcol_select_myisam.result | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mysql-test/suite/gcol/r/gcol_select_myisam.result b/mysql-test/suite/gcol/r/gcol_select_myisam.result index 6e3411dc066..05d9fa3a244 100644 --- a/mysql-test/suite/gcol/r/gcol_select_myisam.result +++ b/mysql-test/suite/gcol/r/gcol_select_myisam.result @@ -1102,7 +1102,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT * FROM t1 AS t2 STRAIGHT_JOIN t1 FORCE INDEX(b) WHERE t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL b NULL NULL NULL 2 Using where -1 SIMPLE t1 ref b b 5 test.t2.b 1 +1 SIMPLE t1 eq_ref b b 5 test.t2.b 1 EXPLAIN SELECT b FROM t1 FORCE INDEX(b); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL b 5 NULL 2 Using index |