You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
542 lines
16 KiB
542 lines
16 KiB
#
|
|
# Test of heap tables.
|
|
#
|
|
|
|
--disable_warnings
|
|
drop table if exists t1,t2,t3;
|
|
--enable_warnings
|
|
|
|
create table t1 (a int not null,b int not null, primary key (a)) engine=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
|
|
insert into t1 values(1,1),(2,2),(3,3),(4,4);
|
|
delete from t1 where a=1 or a=0;
|
|
#show table status like "t1";
|
|
analyze table t1;
|
|
show keys from t1;
|
|
select * from t1;
|
|
select * from t1 where a=4;
|
|
update t1 set b=5 where a=4;
|
|
update t1 set b=b+1 where a>=3;
|
|
replace t1 values (3,3);
|
|
select * from t1;
|
|
alter table t1 add c int not null, add key (c,a);
|
|
drop table t1;
|
|
|
|
create table t1 (a int not null,b int not null, primary key (a)) engine=memory comment="testing heaps";
|
|
insert into t1 values(1,1),(2,2),(3,3),(4,4);
|
|
delete from t1 where a > 0;
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
create table t1 (a int not null,b int not null, primary key (a)) engine=heap comment="testing heaps";
|
|
insert into t1 values(1,1),(2,2),(3,3),(4,4);
|
|
alter table t1 modify a int not null auto_increment, engine=innodb, comment="new innodb table";
|
|
#show table status like "t1";
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
create table t1 (a int not null) engine=heap;
|
|
insert into t1 values (869751),(736494),(226312),(802616),(728912);
|
|
select * from t1 where a > 736494;
|
|
alter table t1 add unique uniq_id(a);
|
|
select * from t1 where a > 736494;
|
|
select * from t1 where a = 736494;
|
|
select * from t1 where a=869751 or a=736494;
|
|
select * from t1 where a in (869751,736494,226312,802616);
|
|
alter table t1 engine=innodb;
|
|
--replace_column 10 # 11 #
|
|
explain select * from t1 where a in (869751,736494,226312,802616);
|
|
drop table t1;
|
|
|
|
create table t1 (x int not null, y int not null, key x (x), unique y (y))
|
|
engine=heap;
|
|
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
|
|
select * from t1 where x=1;
|
|
select * from t1,t1 as t2 where t1.x=t2.y;
|
|
explain select * from t1,t1 as t2 where t1.x=t2.y;
|
|
drop table t1;
|
|
|
|
create table t1 (a int) engine=heap;
|
|
insert into t1 values(1);
|
|
select max(a) from t1;
|
|
drop table t1;
|
|
|
|
CREATE TABLE t1 ( a int not null default 0, b int not null default 0, key(a), key(b) ) ENGINE=HEAP;
|
|
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
|
|
select * from t1 where a=1;
|
|
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
|
|
select * from t1 where a=1;
|
|
drop table t1;
|
|
|
|
create table t1 (id int unsigned not null, primary key (id)) engine=HEAP;
|
|
insert into t1 values(1);
|
|
select max(id) from t1;
|
|
insert into t1 values(2);
|
|
select max(id) from t1;
|
|
replace into t1 values(1);
|
|
drop table t1;
|
|
|
|
create table t1 (n int) engine=heap;
|
|
drop table t1;
|
|
|
|
create table t1 (n int) engine=heap;
|
|
drop table if exists t1;
|
|
|
|
# Test of non unique index
|
|
|
|
CREATE table t1(f1 int not null,f2 char(20) not
|
|
null,index(f2)) engine=heap;
|
|
INSERT into t1 set f1=12,f2="bill";
|
|
INSERT into t1 set f1=13,f2="bill";
|
|
INSERT into t1 set f1=14,f2="bill";
|
|
INSERT into t1 set f1=15,f2="bill";
|
|
INSERT into t1 set f1=16,f2="ted";
|
|
INSERT into t1 set f1=12,f2="ted";
|
|
INSERT into t1 set f1=12,f2="ted";
|
|
INSERT into t1 set f1=12,f2="ted";
|
|
INSERT into t1 set f1=12,f2="ted";
|
|
delete from t1 where f2="bill";
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
#
|
|
# Test when using part key searches
|
|
#
|
|
|
|
create table t1 (btn char(10) not null, key(btn)) charset utf8mb4 engine=heap;
|
|
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
|
|
explain select * from t1 where btn like "q%";
|
|
select * from t1 where btn like "q%";
|
|
alter table t1 add column new_col char(1) not null, add key (btn,new_col), drop key btn;
|
|
update t1 set new_col=left(btn,1);
|
|
explain select * from t1 where btn="a";
|
|
explain select * from t1 where btn="a" and new_col="a";
|
|
drop table t1;
|
|
|
|
#
|
|
# Test of NULL keys
|
|
#
|
|
|
|
CREATE TABLE t1 (
|
|
a int default NULL,
|
|
b int default NULL,
|
|
KEY a (a),
|
|
UNIQUE b (b)
|
|
) engine=heap;
|
|
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
|
|
SELECT * FROM t1 WHERE a=NULL;
|
|
explain SELECT * FROM t1 WHERE a IS NULL;
|
|
SELECT * FROM t1 WHERE a<=>NULL;
|
|
SELECT * FROM t1 WHERE b=NULL;
|
|
explain SELECT * FROM t1 WHERE b IS NULL;
|
|
SELECT * FROM t1 WHERE b<=>NULL;
|
|
|
|
--error ER_DUP_ENTRY
|
|
INSERT INTO t1 VALUES (1,3);
|
|
DROP TABLE t1;
|
|
|
|
CREATE TABLE t1 (
|
|
a int default NULL,
|
|
key a (a)
|
|
) ENGINE=HEAP;
|
|
INSERT INTO t1 VALUES (10), (10), (10);
|
|
EXPLAIN SELECT * FROM t1 WHERE a=10;
|
|
SELECT * FROM t1 WHERE a=10;
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Test when deleting all rows
|
|
#
|
|
|
|
CREATE TABLE t1 (a int not null, primary key(a)) engine=heap;
|
|
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
|
|
DELETE from t1 where a < 100;
|
|
SELECT * from t1;
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Bug#4411 Server hangs when trying to SELECT MAX(id) from an empty HEAP table
|
|
#
|
|
CREATE TABLE `job_titles` (
|
|
`job_title_id` int(6) unsigned NOT NULL default '0',
|
|
`job_title` char(18) NOT NULL default '',
|
|
PRIMARY KEY (`job_title_id`),
|
|
UNIQUE KEY `job_title_id` (`job_title_id`,`job_title`)
|
|
) ENGINE=HEAP;
|
|
|
|
SELECT MAX(job_title_id) FROM job_titles;
|
|
|
|
DROP TABLE job_titles;
|
|
|
|
#
|
|
# Test of delete with NOT NULL
|
|
# (Bug #6082)
|
|
#
|
|
|
|
CREATE TABLE t1 (a INT NOT NULL, B INT, KEY(B)) ENGINE=HEAP;
|
|
INSERT INTO t1 VALUES(1,1), (1,NULL);
|
|
SELECT * FROM t1 WHERE B is not null;
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Bug #6748
|
|
# heap_rfirst() doesn't work (and never did!)
|
|
#
|
|
CREATE TABLE t1 (pseudo char(35) PRIMARY KEY, date int(10) unsigned NOT NULL) ENGINE=HEAP;
|
|
INSERT INTO t1 VALUES ('massecot',1101106491),('altec',1101106492),('stitch+',1101106304),('Seb Corgan',1101106305),('beerfilou',1101106263),('flaker',1101106529),('joce8',5),('M4vrick',1101106418),('gabay008',1101106525),('Vamp irX',1101106291),('ZoomZip',1101106546),('rip666',1101106502),('CBP ',1101106397),('guezpard',1101106496);
|
|
DELETE FROM t1 WHERE date<1101106546;
|
|
SELECT * FROM t1;
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Bug #6878: a problem with small length records
|
|
#
|
|
|
|
create table t1(a char(2)) engine=memory;
|
|
insert into t1 values (NULL), (NULL);
|
|
delete from t1 where a is null;
|
|
insert into t1 values ('2'), ('3');
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
#
|
|
# Test varchar
|
|
# We can't use varchar.inc becasue heap doesn't support blob's
|
|
#
|
|
|
|
let $default=`select @@default_storage_engine`;
|
|
set default_storage_engine=HEAP;
|
|
|
|
#
|
|
# Simple basic test that endspace is saved
|
|
#
|
|
|
|
create table t1 (v varchar(10), c char(10), t varchar(50)) charset utf8mb4;
|
|
insert into t1 values('+ ', '+ ', '+ ');
|
|
set @a=repeat(' ',20);
|
|
insert into t1 values (concat('+',@a),concat('+',@a),concat('+',@a));
|
|
select concat('*',v,'*',c,'*',t,'*') from t1;
|
|
|
|
# Check how columns are copied
|
|
show create table t1;
|
|
create table t2 like t1;
|
|
show create table t2;
|
|
create table t3 charset utf8mb4 select * from t1;
|
|
show create table t3;
|
|
alter table t1 modify c varchar(10);
|
|
show create table t1;
|
|
alter table t1 modify v char(10);
|
|
show create table t1;
|
|
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
|
|
alter table t1 modify t varchar(10);
|
|
SET sql_mode = default;
|
|
show create table t1;
|
|
select concat('*',v,'*',c,'*',t,'*') from t1;
|
|
drop table t1,t2,t3;
|
|
|
|
#
|
|
# Testing of keys
|
|
#
|
|
create table t1 (v varchar(10), c char(10), t varchar(50), key(v), key(c), key(t(10))) charset latin1;
|
|
show create table t1;
|
|
disable_query_log;
|
|
let $1=10;
|
|
while ($1)
|
|
{
|
|
let $2=27;
|
|
eval set @space=repeat(' ',10-$1);
|
|
while ($2)
|
|
{
|
|
eval set @char=char(ascii('a')+$2-1);
|
|
insert into t1 values(concat(@char,@space),concat(@char,@space),concat(@char,@space));
|
|
dec $2;
|
|
}
|
|
dec $1;
|
|
}
|
|
enable_query_log;
|
|
select count(*) from t1;
|
|
insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
|
|
select count(*) from t1 where v='a';
|
|
select count(*) from t1 where c='a';
|
|
select count(*) from t1 where t='a';
|
|
select count(*) from t1 where v='a ';
|
|
select count(*) from t1 where c='a ';
|
|
select count(*) from t1 where t='a ';
|
|
select count(*) from t1 where v between 'a' and 'a ';
|
|
select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
|
|
select count(*) from t1 where v like 'a%';
|
|
select count(*) from t1 where c like 'a%';
|
|
select count(*) from t1 where t like 'a%';
|
|
select count(*) from t1 where v like 'a %';
|
|
explain select count(*) from t1 where v='a ';
|
|
explain select count(*) from t1 where c='a ';
|
|
explain select count(*) from t1 where t='a ';
|
|
explain select count(*) from t1 where v like 'a%';
|
|
explain select count(*) from t1 where v between 'a' and 'a ';
|
|
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
|
|
|
|
--error ER_DUP_ENTRY
|
|
alter table t1 add unique(v);
|
|
select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
|
|
explain select * from t1 where v='a';
|
|
|
|
# GROUP BY
|
|
|
|
select v,count(*) from t1 group by v order by v limit 9;
|
|
select v,count(t) from t1 group by v order by v limit 10;
|
|
select v,count(c) from t1 group by v order by v limit 10;
|
|
select sql_big_result trim(v),count(t) from t1 group by v order by v limit 10;
|
|
select sql_big_result trim(v),count(c) from t1 group by v order by v limit 10;
|
|
select c,count(*) from t1 group by c order by c limit 10;
|
|
select c,count(t) from t1 group by c order by c limit 10;
|
|
select sql_big_result c,count(t) from t1 group by c order by c limit 10;
|
|
select t,count(*) from t1 group by t order by t limit 10;
|
|
select t,count(t) from t1 group by t order by t limit 10;
|
|
select sql_big_result trim(t),count(t) from t1 group by t order by t limit 10;
|
|
drop table t1;
|
|
|
|
#
|
|
# Test unique keys
|
|
#
|
|
|
|
create table t1 (a char(10), unique (a)) charset latin1;
|
|
insert into t1 values ('a');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
|
|
alter table t1 modify a varchar(10);
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a '),('a '),('a '),('a ');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
update t1 set a='a ' where a like 'a ';
|
|
update t1 set a='a ' where a like 'a ';
|
|
drop table t1;
|
|
|
|
#
|
|
# Testing of btree keys
|
|
#
|
|
|
|
create table t1 (v varchar(10), c char(10), t varchar(50), key using btree (v), key using btree (c), key using btree (t(10))) charset latin1;
|
|
show create table t1;
|
|
disable_query_log;
|
|
let $1=10;
|
|
while ($1)
|
|
{
|
|
let $2=27;
|
|
eval set @space=repeat(' ',10-$1);
|
|
while ($2)
|
|
{
|
|
eval set @char=char(ascii('a')+$2-1);
|
|
insert into t1 values(concat(@char,@space),concat(@char,@space),concat(@char,@space));
|
|
dec $2;
|
|
}
|
|
dec $1;
|
|
}
|
|
enable_query_log;
|
|
select count(*) from t1;
|
|
insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
|
|
select count(*) from t1 where v='a';
|
|
select count(*) from t1 where c='a';
|
|
select count(*) from t1 where t='a';
|
|
select count(*) from t1 where v='a ';
|
|
select count(*) from t1 where c='a ';
|
|
select count(*) from t1 where t='a ';
|
|
select count(*) from t1 where v between 'a' and 'a ';
|
|
--replace_column 10 #
|
|
select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
|
|
--replace_column 10 #
|
|
explain select count(*) from t1 where v='a ';
|
|
--replace_column 10 #
|
|
explain select count(*) from t1 where c='a ';
|
|
--replace_column 10 #
|
|
explain select count(*) from t1 where t='a ';
|
|
--replace_column 10 #
|
|
explain select count(*) from t1 where v like 'a%';
|
|
--replace_column 10 #
|
|
explain select count(*) from t1 where v between 'a' and 'a ';
|
|
--replace_column 10 #
|
|
explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n';
|
|
|
|
--error ER_DUP_ENTRY
|
|
alter table t1 add unique(v);
|
|
select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
|
|
# Number of rows is not constant for b-trees keys
|
|
--replace_column 10 #
|
|
explain select * from t1 where v='a';
|
|
|
|
drop table t1;
|
|
|
|
#
|
|
# Test unique btree keys
|
|
#
|
|
|
|
create table t1 (a char(10), unique using btree (a)) charset latin1 engine=heap;
|
|
insert into t1 values ('a');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
|
|
alter table t1 modify a varchar(10);
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a '),('a '),('a '),('a ');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ('a ');
|
|
update t1 set a='a ' where a like 'a ';
|
|
update t1 set a='a ' where a like 'a ';
|
|
drop table t1;
|
|
|
|
#
|
|
# test show create table
|
|
#
|
|
|
|
create table t1 (v varchar(10), c char(10), t varchar(50), key(v(5)), key(c(5)), key(t(5))) charset utf8mb4;
|
|
show create table t1;
|
|
drop table t1;
|
|
|
|
create table t1 (v varchar(65530), key(v(10))) charset latin1;
|
|
show create table t1;
|
|
insert into t1 values(repeat('a',65530));
|
|
select length(v) from t1 where v=repeat('a',65530);
|
|
drop table t1;
|
|
|
|
#
|
|
# Reset varchar test
|
|
#
|
|
eval set default_storage_engine=$default;
|
|
|
|
#
|
|
# Bug #8489: Strange auto_increment behaviour
|
|
#
|
|
|
|
create table t1 (a bigint unsigned auto_increment primary key, b int,
|
|
key (b, a)) engine=heap;
|
|
insert t1 (b) values (1),(1),(1),(1),(1),(1),(1),(1);
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
create table t1 (a int not null, b int not null auto_increment,
|
|
primary key(a, b), key(b)) engine=heap;
|
|
insert t1 (a) values (1),(1),(1),(1),(1),(1),(1),(1);
|
|
select * from t1;
|
|
drop table t1;
|
|
|
|
--error 1075
|
|
create table t1 (a int not null, b int not null auto_increment,
|
|
primary key(a, b)) engine=heap;
|
|
|
|
#
|
|
# Bug #10566: Verify that we can create a prefixed key with length > 255
|
|
#
|
|
create table t1 (c char(255), primary key(c(90)));
|
|
insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
|
|
--error ER_DUP_ENTRY
|
|
insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
|
|
drop table t1;
|
|
|
|
--echo #
|
|
--echo # Bug 12796: Record doesn't show when selecting through index
|
|
--echo #
|
|
CREATE TABLE t1 (a int, key(a)) engine=heap;
|
|
insert into t1 values (0);
|
|
delete from t1;
|
|
select * from t1;
|
|
insert into t1 values (0), (1);
|
|
select * from t1 where a = 0;
|
|
drop table t1;
|
|
|
|
# End of 4.1 tests
|
|
|
|
#
|
|
# Bug #3094: Row format of memory tables should always be reported as Fixed
|
|
#
|
|
create table t1 (c char(10)) charset utf8mb4 engine=memory;
|
|
create table t2 (c varchar(10)) charset utf8mb4 engine=memory;
|
|
analyze table t1, t2;
|
|
--replace_column 8 # 12 #
|
|
show table status like 't_';
|
|
drop table t1, t2;
|
|
|
|
#
|
|
# BUG#18233 - Memory tables INDEX USING HASH (a,b) returns 1 row on
|
|
# SELECT WHERE a= AND b=
|
|
#
|
|
CREATE TABLE t1(a VARCHAR(1), b VARCHAR(2), c VARCHAR(256),
|
|
KEY(a), KEY(b), KEY(c)) ENGINE=MEMORY;
|
|
INSERT INTO t1 VALUES('a','aa',REPEAT('a', 256)),('a','aa',REPEAT('a',256));
|
|
SELECT COUNT(*) FROM t1 WHERE a='a';
|
|
SELECT COUNT(*) FROM t1 WHERE b='aa';
|
|
SELECT COUNT(*) FROM t1 WHERE c=REPEAT('a',256);
|
|
DROP TABLE t1;
|
|
|
|
# End of 5.0 tests
|
|
|
|
#
|
|
# BUG#26080 - Memory Storage engine not working properly
|
|
#
|
|
CREATE TABLE t1(c1 VARCHAR(100), c2 INT) ENGINE=MEMORY;
|
|
INSERT INTO t1 VALUES('', 0);
|
|
ALTER TABLE t1 MODIFY c1 VARCHAR(101);
|
|
SELECT c2 FROM t1;
|
|
DROP TABLE t1;
|
|
|
|
--echo #
|
|
--echo # BUG#11825482: Broken key length calculation for btree index
|
|
--echo #
|
|
--source include/turn_off_only_full_group_by.inc
|
|
|
|
CREATE TABLE h1 (f1 VARCHAR(1), f2 INT NOT NULL,
|
|
UNIQUE KEY h1i (f1,f2) USING BTREE ) ENGINE=HEAP;
|
|
INSERT INTO h1 VALUES(NULL,0),(NULL,1);
|
|
SELECT 'wrong' as 'result' FROM dual WHERE ('h', 0) NOT IN (SELECT * FROM h1);
|
|
|
|
CREATE TABLE t1 (
|
|
pk int NOT NULL,
|
|
col_int_nokey INT,
|
|
col_varchar_nokey VARCHAR(1),
|
|
PRIMARY KEY (pk)
|
|
);
|
|
|
|
INSERT INTO t1 VALUES (19,5,'h'),(20,5,'h');
|
|
|
|
CREATE TABLE t2 (col_int_nokey INT);
|
|
|
|
INSERT INTO t2 VALUES (1),(2);
|
|
|
|
CREATE VIEW v1 AS
|
|
SELECT col_varchar_nokey, COUNT( col_varchar_nokey )
|
|
FROM t1
|
|
WHERE col_int_nokey <= 141 AND pk <= 4
|
|
;
|
|
|
|
SELECT col_int_nokey FROM t2
|
|
WHERE ('h', 0) NOT IN ( SELECT * FROM v1);
|
|
--echo # shouldn't crash
|
|
EXPLAIN SELECT col_int_nokey FROM t2
|
|
WHERE ('h', 0) NOT IN ( SELECT * FROM v1);
|
|
|
|
DROP TABLE t1,t2,h1;
|
|
DROP VIEW v1;
|
|
--source include/restore_sql_mode_after_turn_off_only_full_group_by.inc
|
|
|
|
#
|
|
# BUG 11755870 - 47704: HASH INDEX ON VARCHAR PREFIX NOT WORKING CORRECTLY.
|
|
#
|
|
CREATE TABLE t1 (
|
|
c1 VARCHAR(10) NOT NULL,
|
|
KEY i1 (c1(3))
|
|
) ENGINE=MEMORY DEFAULT CHARSET=latin1;
|
|
INSERT INTO t1 VALUES ('foo1'), ('bar2'), ('baz3');
|
|
|
|
SELECT * FROM t1 WHERE c1='bar2';
|
|
--echo #should show one tuple!
|
|
|
|
SELECT * FROM t1 IGNORE INDEX (i1) WHERE c1='bar2';
|
|
--echo #should show one tuple!
|
|
DROP TABLE t1;
|
|
|