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bell@sanja.is.com.ua
@@ -877,7 +877,7 @@ insert into t1 values (1), (2), (3), (200);
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create view v1 (x) as select a from t1 where a > 1;
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create view v2 (y) as select x from v1 where x < 100;
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select * from v2;
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x
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y
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2
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3
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drop table t1;
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@@ -1424,3 +1424,201 @@ a
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1
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drop view v1;
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drop table t1;
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drop table t1,t2;
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create table t1 (a int);
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create table t2 (a int);
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create table t3 (a int);
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insert into t1 values (1), (2), (3);
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insert into t2 values (1), (3);
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insert into t3 values (1), (2), (4);
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create view v3 (a,b) as select t1.a as a, t2.a as b from t1 left join t2 on (t1.a=t2.a);
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select * from t3 left join v3 on (t3.a = v3.a);
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a a b
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1 1 1
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2 2 NULL
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4 NULL NULL
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explain extended select * from t3 left join v3 on (t3.a = v3.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 3
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2
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Warnings:
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Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `b` from `test`.`t3` left join (`test`.`t1` left join `test`.`t2` on((`test`.`t1`.`a` = `test`.`t2`.`a`))) on((`test`.`t3`.`a` = `test`.`t1`.`a`)) where 1
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create view v1 (a) as select a from t1;
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create view v2 (a) as select a from t2;
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create view v4 (a,b) as select v1.a as a, v2.a as b from v1 left join v2 on (v1.a=v2.a);
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select * from t3 left join v4 on (t3.a = v4.a);
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a a b
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1 1 1
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2 2 NULL
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4 NULL NULL
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explain extended select * from t3 left join v4 on (t3.a = v4.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 3
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2
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Warnings:
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Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `b` from `test`.`t3` left join (`test`.`v1` left join `test`.`v2` on((`test`.`t1`.`a` = `test`.`t2`.`a`))) on((`test`.`t3`.`a` = `test`.`t1`.`a`)) where 1
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prepare stmt1 from "select * from t3 left join v4 on (t3.a = v4.a);";
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execute stmt1;
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a a b
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1 1 1
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2 2 NULL
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4 NULL NULL
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execute stmt1;
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a a b
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1 1 1
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2 2 NULL
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4 NULL NULL
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deallocate prepare stmt1;
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drop view v4,v3,v2,v1;
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drop tables t1,t2,t3;
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create table t1 (a int, primary key (a), b int);
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create table t2 (a int, primary key (a));
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insert into t1 values (1,100), (2,200);
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insert into t2 values (1), (3);
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create view v3 (a,b) as select t1.a as a, t2.a as b from t1, t2;
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update v3 set a= 10 where a=1;
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select * from t1;
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a b
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10 100
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2 200
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select * from t2;
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a
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1
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3
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create view v2 (a,b) as select t1.b as a, t2.a as b from t1, t2;
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update v2 set a= 10 where a=200;
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ERROR HY000: The target table v2 of the UPDATE is not updatable
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select * from v3;
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a b
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2 1
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10 1
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2 3
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10 3
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select * from v2;
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a b
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100 1
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200 1
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100 3
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200 3
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set @a= 10;
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set @b= 100;
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prepare stmt1 from "update v3 set a= ? where a=?";
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execute stmt1 using @a,@b;
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select * from v3;
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a b
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2 1
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10 1
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2 3
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10 3
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set @a= 300;
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set @b= 10;
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execute stmt1 using @a,@b;
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select * from v3;
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a b
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2 1
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300 1
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2 3
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300 3
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deallocate prepare stmt1;
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drop view v3,v2;
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drop tables t1,t2;
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create table t1 (a int, primary key (a), b int);
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create table t2 (a int, primary key (a), b int);
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insert into t2 values (1000, 2000);
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create view v3 (a,b) as select t1.a as a, t2.a as b from t1, t2;
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insert into v3 values (1,2);
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ERROR HY000: Can not insert into join view 'test.v3' without fields list
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insert into v3 select * from t2;
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ERROR HY000: Can not insert into join view 'test.v3' without fields list
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insert into v3(a,b) values (1,2);
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ERROR HY000: Can not modify more than one base table through a join view 'test.v3'
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insert into v3(a,b) select * from t2;
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ERROR HY000: Can not modify more than one base table through a join view 'test.v3'
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insert into v3(a) values (1);
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insert into v3(b) values (10);
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insert into v3(a) select a from t2;
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insert into v3(b) select b from t2;
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Warnings:
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Warning 1263 Data truncated; NULL supplied to NOT NULL column 'a' at row 2
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insert into v3(a) values (1) on duplicate key update a=a+10000+VALUES(a);
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select * from t1;
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a b
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10002 NULL
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10 NULL
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1000 NULL
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select * from t2;
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a b
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1000 2000
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10 NULL
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2000 NULL
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0 NULL
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create view v2 (a,b) as select t1.b as a, t2.a as b from t1, t2;
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insert into v2(a) values (10);
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ERROR HY000: The target table v2 of the INSERT is not updatable
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select * from v3;
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a b
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10 1000
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1000 1000
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10002 1000
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10 10
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1000 10
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10002 10
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10 2000
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1000 2000
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10002 2000
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10 0
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1000 0
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10002 0
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select * from v2;
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a b
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NULL 1000
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NULL 1000
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NULL 1000
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NULL 10
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NULL 10
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NULL 10
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NULL 2000
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NULL 2000
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NULL 2000
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NULL 0
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NULL 0
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NULL 0
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delete from v3;
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ERROR HY000: Can not delete from join view 'test.v3'
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delete v3,t1 from v3,t1;
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ERROR HY000: Can not delete from join view 'test.v3'
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delete from t1;
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prepare stmt1 from "insert into v3(a) values (?);";
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set @a= 100;
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execute stmt1 using @a;
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set @a= 300;
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execute stmt1 using @a;
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deallocate prepare stmt1;
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prepare stmt1 from "insert into v3(a) select ?;";
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set @a= 101;
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execute stmt1 using @a;
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set @a= 301;
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execute stmt1 using @a;
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deallocate prepare stmt1;
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select * from v3;
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a b
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100 1000
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101 1000
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300 1000
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301 1000
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100 10
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101 10
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300 10
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301 10
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100 2000
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101 2000
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300 2000
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301 2000
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100 0
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101 0
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300 0
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301 0
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drop view v3,v2;
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drop tables t1,t2;
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