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.
231 lines
6.2 KiB
231 lines
6.2 KiB
DROP TABLE IF EXISTS t;
|
|
|
|
CREATE TABLE t (
|
|
c1 int,
|
|
c2 int,
|
|
c3 int,
|
|
PRIMARY KEY (c1)
|
|
);
|
|
|
|
INSERT INTO t VALUES (1,2,3);
|
|
set session tidb_hashagg_partial_concurrency = 1;
|
|
set session tidb_hashagg_final_concurrency = 1;
|
|
|
|
SELECT * from t;
|
|
SELECT c1, c2, c3 from t;
|
|
SELECT c1, c1 from t;
|
|
SELECT c1 as a, c2 as a from t;
|
|
|
|
SELECT 1;
|
|
SELECT 1, 1;
|
|
SET @@autocommit = 1;
|
|
SELECT @@autocommit;
|
|
SELECT @@autocommit, @@autocommit;
|
|
SET @a = 10;
|
|
SET @b = 11;
|
|
SELECT @a, @@autocommit;
|
|
SELECT @a, @b;
|
|
SELECT 1, @a;
|
|
SELECT 1, @a as a;
|
|
SELECT 1, @a, @@autocommit as a, c1 from t;
|
|
SET @b = "123";
|
|
SELECT @b + "123";
|
|
# TODO: the field name for 1 + 1 should be "1 + 1", but now is 2
|
|
# we may discuss whether to support it like in MySQL later.
|
|
SELECT 1 + 1;
|
|
|
|
SELECT 1 a, 1 as a, 1 + 1 a;
|
|
SELECT c1 a, c1 as a from t;
|
|
|
|
SELECT * from t LIMIT 0,1;
|
|
SELECT * from t LIMIT 1;
|
|
SELECT * from t LIMIT 1,1;
|
|
SELECT * from t LIMIT 1 OFFSET 0;
|
|
|
|
DROP TABLE IF EXISTS t2;
|
|
CREATE TABLE t2 (
|
|
c1 int,
|
|
c2 int,
|
|
PRIMARY KEY (c1)
|
|
);
|
|
|
|
INSERT INTO t2 VALUES (1,2);
|
|
|
|
SELECT * from t a;
|
|
SELECT * from t a, t2 b;
|
|
SELECT * from t as a, t2 as b;
|
|
SELECT * from t a left join t2 b on a.c1 = b.c1;
|
|
|
|
--error ER_DUP_FIELDNAME
|
|
SELECT * from (SELECT 1, 1) as a;
|
|
|
|
--error ER_DUP_FIELDNAME
|
|
SELECT * from (SELECT * FROM t, t2) as a;
|
|
|
|
# Select bool field
|
|
DROP TABLE IF EXISTS t;
|
|
CREATE TABLE t (c1 INT, c2 INT);
|
|
INSERT INTO t VALUES (1, 2), (1, 1), (1, 3);
|
|
SELECT c1=c2 FROM t;
|
|
SELECT 1=1;
|
|
|
|
SELECT t.c1 + t.c2 from t limit 1;
|
|
SELECT t.c1 from t limit 1;
|
|
SELECT t.c1 + c2 from t limit 1;
|
|
SELECT c1 + 10 from t limit 1;
|
|
SELECT t.c1 + 10 from t limit 1;
|
|
|
|
# all
|
|
SELECT all c1, c2 from t limit 1;
|
|
|
|
# distinct
|
|
SELECT distinct c1, c2 from t order by c1, c2 limit 1;
|
|
|
|
# not
|
|
SELECT c2 from t where not (c2 > 2);
|
|
select c2 from t where not null is null;
|
|
|
|
# unary field name
|
|
select !(1 + 2);
|
|
|
|
# - +
|
|
select + - 1, --1, +-+-+1, + "123";
|
|
select --------------------1, ++++++++++++++++++++1;
|
|
select +(+(1)), (-+1), ((+1)), +1.23, +1e23, +1E23, +null, +true, +false, + ( ( 1 ) );
|
|
select +
|
|
(
|
|
+
|
|
(
|
|
1
|
|
)
|
|
)
|
|
;
|
|
select + ( + 1 );
|
|
select --+(1 + 1), +-+-(1 * 1);
|
|
|
|
# where static condition
|
|
select * from t where null;
|
|
select * from t where 1;
|
|
select * from t where 0;
|
|
select * from t where 0 * 10;
|
|
select * from t where null is not null;
|
|
select * from t where !1;
|
|
select * from t where 1 && 0 || 3 && null;
|
|
|
|
# cross join
|
|
select * from t as a, t2 as b;
|
|
select * from t as a cross join t2 as b;
|
|
select * from t as a join t2 as b;
|
|
select * from t as a join t2 as b on a.c2 = b.c2;
|
|
|
|
# from clause
|
|
select * from (t);
|
|
select * from (t as a, t2 as b);
|
|
select * from (t as a cross join t2 as b);
|
|
|
|
# table nil plan
|
|
select 1 as a from t;
|
|
select count(*), 1 from t;
|
|
select *, 1 from t;
|
|
|
|
# expr test
|
|
select 1, count(1), sum(1);
|
|
|
|
#test topn push down
|
|
drop table if exists t1;
|
|
create table t1(a int primary key, b int, c int, index idx(b, c));
|
|
insert into t1 values(1, 2, 3);
|
|
insert into t1 values(2, 3, 4);
|
|
insert into t1 values(3 ,4, 5);
|
|
insert into t1 values(4, 5, 6);
|
|
insert into t1 values(5, 6, 7);
|
|
insert into t1 values(6, 7, 8);
|
|
insert into t1 values(7, 8, 9);
|
|
insert into t1 values(9, 10, 11);
|
|
explain select a, c from t1 use index(idx) order by a limit 5;
|
|
select c, a from t1 use index(idx) order by a limit 5;
|
|
|
|
#test stream aggregation push down
|
|
drop table if exists t;
|
|
create table t (a int, b int, c int, key idx(a, b, c));
|
|
#test for empty table
|
|
explain select count(a) from t;
|
|
select count(a) from t;
|
|
#test for one row
|
|
insert t values(0,0,0);
|
|
explain select distinct b from t group by a;
|
|
select distinct b from t group by a;
|
|
explain select count(b) from t group by a;
|
|
select count(b) from t group by a;
|
|
#test for rows
|
|
insert t values(1,1,1),(3,3,6),(3,2,5),(2,1,4),(1,1,3),(1,1,2);
|
|
explain select count(a) from t where b>0 group by a, b;
|
|
select count(a) from t where b>0 group by a, b;
|
|
explain select count(a) from t where b>0 group by a, b order by a;
|
|
select count(a) from t where b>0 group by a, b order by a;
|
|
explain select count(a) from t where b>0 group by a, b order by a limit 1;
|
|
select count(a) from t where b>0 group by a, b order by a limit 1;
|
|
|
|
# test outer join simplification, issue #7687
|
|
drop table if exists t;
|
|
create table t (id int primary key, a int, b int);
|
|
explain select * from (t t1 left join t t2 on t1.a = t2.a) left join (t t3 left join t t4 on t3.a = t4.a) on t2.b = 1;
|
|
|
|
drop table if exists t;
|
|
create table t(a bigint primary key, b bigint);
|
|
desc select * from t where a = 1;
|
|
desc select * from t where a = '1';
|
|
|
|
desc select sysdate(), sleep(1), sysdate();
|
|
|
|
# test select partition table
|
|
drop table if exists th;
|
|
set @@session.tidb_enable_table_partition = '1';
|
|
create table th (a int, b int) partition by hash(a) partitions 3;
|
|
insert into th values (0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8);
|
|
insert into th values (-1,-1),(-2,-2),(-3,-3),(-4,-4),(-5,-5),(-6,-6),(-7,-7),(-8,-8);
|
|
desc select * from th where a=-2;
|
|
desc select * from th;
|
|
desc select * from th partition (p2,p1);
|
|
|
|
# test != any(subq) and = all(subq)
|
|
drop table if exists t;
|
|
create table t(a int, b int);
|
|
explain select a != any (select a from t t2) from t t1;
|
|
explain select a = all (select a from t t2) from t t1;
|
|
|
|
drop table if exists t;
|
|
create table t(a int, b int);
|
|
drop table if exists s;
|
|
create table s(a varchar(20), b varchar(20));
|
|
explain select a in (select a from s where s.b = t.b) from t;
|
|
explain select a in (select a+b from t t2 where t2.b = t1.b) from t t1;
|
|
drop table t;
|
|
create table t(a int not null, b int);
|
|
explain select a in (select a from t t2 where t2.b = t1.b) from t t1;
|
|
|
|
# test sleep in subquery
|
|
explain select 1 from (select sleep(1)) t;
|
|
|
|
# test order by rand()
|
|
drop table if exists t;
|
|
create table t(a int, b int);
|
|
explain select a from t order by rand();
|
|
explain select a, b from t order by abs(2);
|
|
explain select a from t order by abs(rand())+1;
|
|
|
|
# test order by correlated column
|
|
drop table if exists t1;
|
|
create table t1(a int, b int);
|
|
drop table if exists t2;
|
|
create table t2(a int, b int);
|
|
explain select * from t1 where t1.a in (select t2.a as a from t2 where t2.b > t1.b order by t1.b);
|
|
|
|
# test fields with windows function
|
|
drop table t;
|
|
CREATE TABLE t (id int(10) unsigned NOT NULL AUTO_INCREMENT,
|
|
i int(10) unsigned DEFAULT NULL,
|
|
x int(10) unsigned DEFAULT '0',
|
|
PRIMARY KEY (`id`)
|
|
);
|
|
explain select row_number() over( partition by i ) - x as rnk from t;
|
|
|