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baf0c9ad08
Column names weren't checked for uniqueness for subqueries. Code for names uniqueness checking used for view creation moved into separate function named check_duplicate_names(). It's called on preparation of subqueries to check uniqueness of names. If duplicate names are found then error is raised.
91 lines
2.3 KiB
Plaintext
91 lines
2.3 KiB
Plaintext
#
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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
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