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4b2aab14ba
Support of views wasn't implemented for the TRUNCATE statement. Now TRUNCATE on views has the same semantics as DELETE FROM view: mysql_truncate() checks whether the table is a view and falls back to delete if so. In order to initialize properly the LEX::updatable for a view st_lex::can_use_merged() now allows usage of merged views for the TRUNCATE statement.
83 lines
1.8 KiB
Plaintext
83 lines
1.8 KiB
Plaintext
drop table if exists t1;
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create table t1 (a integer, b integer,c1 CHAR(10));
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insert into t1 (a) values (1),(2);
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truncate table t1;
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select count(*) from t1;
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count(*)
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0
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insert into t1 values(1,2,"test");
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select count(*) from t1;
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count(*)
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1
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delete from t1;
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select * from t1;
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a b c1
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drop table t1;
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select count(*) from t1;
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ERROR 42S02: Table 'test.t1' doesn't exist
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create temporary table t1 (n int);
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insert into t1 values (1),(2),(3);
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truncate table t1;
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select * from t1;
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n
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drop table t1;
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truncate non_existing_table;
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ERROR 42S02: Table 'test.non_existing_table' doesn't exist
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create table t1 (a integer auto_increment primary key);
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insert into t1 (a) values (NULL),(NULL);
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truncate table t1;
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insert into t1 (a) values (NULL),(NULL);
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SELECT * from t1;
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a
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1
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2
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delete from t1;
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insert into t1 (a) values (NULL),(NULL);
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SELECT * from t1;
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a
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3
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4
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drop table t1;
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create temporary table t1 (a integer auto_increment primary key);
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insert into t1 (a) values (NULL),(NULL);
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truncate table t1;
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insert into t1 (a) values (NULL),(NULL);
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SELECT * from t1;
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a
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1
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2
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delete from t1;
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insert into t1 (a) values (NULL),(NULL);
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SELECT * from t1;
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a
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3
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4
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drop table t1;
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create table t1 (s1 int);
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insert into t1 (s1) values (1), (2), (3), (4), (5);
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create view v1 as select * from t1;
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truncate table v1;
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select count(*) from t1;
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count(*)
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0
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insert into t1 (s1) values (1), (2), (3), (4), (5);
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create view v2 as select * from t1 where s1 > 3;
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truncate table v2;
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select * from t1;
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s1
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1
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2
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3
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select * from v2;
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s1
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delete from t1;
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create table t2 (s1 int, s2 int);
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create view v3 as select a.s1, b.s2 from t1 a join t2 b on a.s1 = b.s1 where a.s1 > 3;
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truncate table v3;
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ERROR HY000: Can not delete from join view 'test.v3'
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create view v4 as select * from t1 limit 1,1;
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truncate table v4;
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ERROR HY000: The target table v4 of the TRUNCATE is not updatable
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drop view v1, v2, v3, v4;
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drop table t1, t2;
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