diff options
Diffstat (limited to 'mysql-test/r/key.result')
| -rw-r--r-- | mysql-test/r/key.result | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/mysql-test/r/key.result b/mysql-test/r/key.result index 115f15bacb6..28824de94ce 100644 --- a/mysql-test/r/key.result +++ b/mysql-test/r/key.result @@ -206,3 +206,32 @@ select i from t1 where b=repeat(_utf8 'b',310); i 1 drop table t1; +CREATE TABLE t1 (id int unsigned auto_increment, name char(50), primary key (id)) engine=myisam; +insert into t1 (name) values ('a'), ('b'),('c'),('d'),('e'),('f'),('g'); +explain select 1 from t1 where id =2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index +explain select 1 from t1 where id =2 or id=3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using where; Using index +explain select name from t1 where id =2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +ALTER TABLE t1 DROP PRIMARY KEY, ADD INDEX (id); +explain select 1 from t1 where id =2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref id id 4 const 1 Using where; Using index +drop table t1; +CREATE TABLE t1 (numeropost mediumint(8) unsigned NOT NULL default '0', numreponse int(10) unsigned NOT NULL auto_increment, PRIMARY KEY (numeropost,numreponse), UNIQUE KEY numreponse (numreponse)); +INSERT INTO t1 (numeropost,numreponse) VALUES ('1','1'),('1','2'),('2','3'),('2','4'); +SELECT numeropost FROM t1 WHERE numreponse='1'; +numeropost +1 +EXPLAIN SELECT numeropost FROM t1 WHERE numreponse='1'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const numreponse numreponse 4 const 1 Using index +FLUSH TABLES; +SELECT numeropost FROM t1 WHERE numreponse='1'; +numeropost +1 +drop table t1; |