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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.
87 lines
1.9 KiB
Plaintext
87 lines
1.9 KiB
Plaintext
#
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# Test of truncate
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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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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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insert into t1 values(1,2,"test");
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select count(*) from t1;
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delete from t1;
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select * from t1;
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drop table t1;
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# The following should fail
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--error 1146
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select count(*) from t1;
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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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drop table t1;
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--error 1146
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truncate non_existing_table;
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#
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# test autoincrement with TRUNCATE; verifying difference with DELETE
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#
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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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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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drop table t1;
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# Verifying that temp tables are handled the same way
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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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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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drop table t1;
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# End of 4.1 tests
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# Test for Bug#5507 "TRUNCATE should work with views"
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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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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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select * from v2;
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delete from t1;
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# The following should fail
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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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--error 1395
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truncate table v3;
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# The following should fail
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create view v4 as select * from t1 limit 1,1;
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--error 1288
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truncate table v4;
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drop view v1, v2, v3, v4;
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drop table t1, t2;
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# End of 5.0 tests
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