truncate.test

来自「这是linux下运行的mysql软件包,可用于linux 下安装 php + m」· TEST 代码 · 共 55 行

#
# Test of truncate
#
--disable_warnings
drop table if exists t1;
--enable_warnings

create table t1 (a integer, b integer,c1 CHAR(10));
insert into t1 (a) values (1),(2);
truncate table t1;
select count(*) from t1;
insert into t1 values(1,2,"test");
select count(*) from t1;
delete from t1;
select * from t1;
drop table t1;
# The following should fail
--error 1146
select count(*) from t1;
create temporary table t1 (n int);
insert into t1 values (1),(2),(3);
truncate table t1;
select * from t1;
drop table t1;
--error 1146
truncate non_existing_table;

#
# test autoincrement with TRUNCATE; verifying difference with DELETE
#

create table t1 (a integer auto_increment primary key);
insert into t1 (a) values (NULL),(NULL);
truncate table t1;
insert into t1 (a) values (NULL),(NULL);
SELECT * from t1;
delete from t1;
insert into t1 (a) values (NULL),(NULL);
SELECT * from t1;
drop table t1;

# Verifying that temp tables are handled the same way

create temporary table t1 (a integer auto_increment primary key);
insert into t1 (a) values (NULL),(NULL);
truncate table t1;
insert into t1 (a) values (NULL),(NULL);
SELECT * from t1;
delete from t1;
insert into t1 (a) values (NULL),(NULL);
SELECT * from t1;
drop table t1;

# End of 4.1 tests