mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 21:42:35 +01:00
83c83a0223
Bug fix when using --no-deaults Sets ref_length to right value (faster rnd_pos() handling in InnoDB). Fixed problem with multi-table-delete and InnoDB Fixed problem with truncate table, which required a COMMIT before. Fixed multi-table-delete bug with InnoDB. Remove not used index from EXPLAIN Docs/manual.texi: ChangeLog include/my_getopt.h: Removed compiler warnings myisam/myisamchk.c: Fixes for new getopt mysql-test/r/explain.result: Updated test results mysql-test/r/innodb.result: Updated test results mysql-test/r/join.result: Updated test results mysql-test/t/innodb.test: Updated test results mysys/default.c: Bug fix when using --no-defaults mysys/my_getopt.c: Fixes for new getopt sql/ha_innodb.cc: Sets ref_length to right value (faster rnd_pos() handling). Fixed problem with multi-table-delete. Fixed problem with truncate table, which required a COMMIT before. sql/opt_sum.cc: Remove not used index from EXPLAIN sql/sql_cache.cc: Fixed core dump bug when not using query cache sql/sql_select.cc: Remove not used index from EXPLAIN
30 lines
1 KiB
Text
30 lines
1 KiB
Text
drop table if exists t1;
|
|
create table t1 (id int not null, str char(10), unique(str));
|
|
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
|
|
select * from t1 where str is null;
|
|
id str
|
|
1 NULL
|
|
2 NULL
|
|
select * from t1 where str="foo";
|
|
id str
|
|
3 foo
|
|
explain select * from t1 where str is null;
|
|
table type possible_keys key key_len ref rows Extra
|
|
t1 ref str str 11 const 1 where used
|
|
explain select * from t1 where str="foo";
|
|
table type possible_keys key key_len ref rows Extra
|
|
t1 const str str 11 const 1
|
|
explain select * from t1 ignore key (str) where str="foo";
|
|
table type possible_keys key key_len ref rows Extra
|
|
t1 ALL NULL NULL NULL NULL 4 where used
|
|
explain select * from t1 use key (str,str) where str="foo";
|
|
table type possible_keys key key_len ref rows Extra
|
|
t1 const str str 11 const 1
|
|
explain select * from t1 use key (str,str,foo) where str="foo";
|
|
Key column 'foo' doesn't exist in table
|
|
explain select * from t1 ignore key (str,str,foo) where str="foo";
|
|
Key column 'foo' doesn't exist in table
|
|
drop table t1;
|
|
explain select 1;
|
|
Comment
|
|
No tables used
|