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1
by brian
clean slate |
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#
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# test of safe selects |
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#
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--disable_warnings
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drop table if exists t1; |
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--enable_warnings
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SET SQL_SAFE_UPDATES=1,SQL_SELECT_LIMIT=4, SQL_MAX_JOIN_SIZE=9; |
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create table t1 (a int auto_increment primary key, b char(20)); |
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insert into t1 values(1,"test"); |
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SELECT SQL_BUFFER_RESULT * from t1; |
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update t1 set b="a" where a=1; |
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delete from t1 where a=1; |
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insert into t1 values(1,"test"),(2,"test2"); |
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SELECT SQL_BUFFER_RESULT * from t1; |
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update t1 set b="a" where a=1; |
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select 1 from t1,t1 as t2,t1 as t3; |
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# The following should give errors: |
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--error 1175
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update t1 set b="a"; |
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--error 1175
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update t1 set b="a" where b="test"; |
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--error 1175
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delete from t1; |
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--error 1175
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delete from t1 where b="test"; |
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--error 1175
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delete from t1 where a+0=1; |
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--error 1104
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select 1 from t1,t1 as t2,t1 as t3,t1 as t4,t1 as t5; |
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# The following should be ok: |
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update t1 set b="a" limit 1; |
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update t1 set b="a" where b="b" limit 2; |
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delete from t1 where b="test" limit 1; |
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delete from t1 where a+0=1 limit 2; |
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# Test SQL_BIG_SELECTS |
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alter table t1 add key b (b); |
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SET MAX_JOIN_SIZE=2; |
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SELECT @@MAX_JOIN_SIZE, @@SQL_BIG_SELECTS; |
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insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"); |
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--error 1104
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SELECT * from t1 order by a; |
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SET SQL_BIG_SELECTS=1; |
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SELECT * from t1 order by a; |
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SET MAX_JOIN_SIZE=2; |
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--error 1104
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SELECT * from t1; |
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SET MAX_JOIN_SIZE=DEFAULT; |
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SELECT * from t1; |
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#
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# Test MAX_SEEKS_FOR_KEY |
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#
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analyze table t1; |
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insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"); |
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explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b; |
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set MAX_SEEKS_FOR_KEY=1; |
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explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b; |
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SET MAX_SEEKS_FOR_KEY=DEFAULT; |
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drop table t1; |
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# BUG#8726 |
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create table t1 (a int); |
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insert into t1 values (1),(2),(3),(4),(5); |
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insert into t1 select * from t1; |
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insert into t1 select * from t1; |
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insert into t1 select * from t1; |
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set local max_join_size=8; |
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--error 1104
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select * from (select * from t1) x; |
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set local max_join_size=1; |
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--error 1104
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select * from (select a.a as aa, b.a as ba from t1 a, t1 b) x; |
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set local max_join_size=1; |
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--error 1104
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select * from (select 1 union select 2 union select 3) x; |
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drop table t1; |
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SET SQL_SAFE_UPDATES=0,SQL_SELECT_LIMIT=DEFAULT, SQL_MAX_JOIN_SIZE=DEFAULT; |
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# End of 4.1 tests |