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| 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/main/order_by.result | |
| 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/main/order_by.result')
| -rw-r--r-- | mysql-test/main/order_by.result | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mysql-test/main/order_by.result b/mysql-test/main/order_by.result index ec03e8c5f45..1bb597095db 100644 --- a/mysql-test/main/order_by.result +++ b/mysql-test/main/order_by.result @@ -1515,7 +1515,7 @@ WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE' ORDER BY t2.c LIMIT 1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 range a,b,c c 5 NULL 420 Using where -1 SIMPLE t1 ref a a 39 test.t2.a,const 1 Using where; Using index +1 SIMPLE t1 eq_ref a a 39 test.t2.a,const 1 Using where; Using index SELECT d FROM t3 AS t1, t2 AS t2 WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE' ORDER BY t2.c LIMIT 1; |