448 lines
12 KiB
Text
448 lines
12 KiB
Text
# Test query expressions with LIMIT and/or OFFSET:
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CREATE TABLE t1(a INTEGER);
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INSERT INTO t1 VALUES(11),(12),(13),(14),(15),(16),(17),(18),(19);
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ANALYZE TABLE t1;
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CREATE TABLE t2(a INTEGER);
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INSERT INTO t2 VALUES(21),(22),(23),(24),(25),(26),(27);
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SELECT * FROM t1 LIMIT 6;
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SELECT * FROM t1 LIMIT 5 OFFSET 1;
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--skip_if_hypergraph # Depends on the query plan.
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EXPLAIN FORMAT=TREE SELECT * FROM t1 LIMIT 5 OFFSET 1;
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(SELECT * FROM t1 LIMIT 7) ORDER BY a DESC LIMIT 4;
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(SELECT * FROM t1 LIMIT 7 OFFSET 1) ORDER BY a DESC LIMIT 4 OFFSET 2;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 7) ORDER BY a LIMIT 4;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 7 OFFSET 1) ORDER BY a LIMIT 4 OFFSET 2;
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SELECT * FROM t1 UNION SELECT * FROM t2 LIMIT 5;
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SELECT * FROM t1 UNION SELECT * FROM t2 LIMIT 5 OFFSET 6;
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SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a LIMIT 5;
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SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a LIMIT 5 OFFSET 6;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 LIMIT 5;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 LIMIT 5 OFFSET 6;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 5;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 5 OFFSET 6;
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(SELECT * FROM t1 LIMIT 5) UNION
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SELECT * FROM t2
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LIMIT 8;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION
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SELECT * FROM t2
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LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
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SELECT * FROM t2
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LIMIT 8;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
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SELECT * FROM t2
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LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION
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SELECT * FROM t2
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ORDER BY a LIMIT 8;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION
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SELECT * FROM t2
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ORDER BY a LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
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SELECT * FROM t2
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ORDER BY a LIMIT 8;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
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SELECT * FROM t2
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ORDER BY a LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION ALL
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SELECT * FROM t2
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LIMIT 8;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION ALL
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SELECT * FROM t2
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LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
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SELECT * FROM t2
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LIMIT 8;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
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SELECT * FROM t2
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LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION ALL
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SELECT * FROM t2
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ORDER BY a LIMIT 8;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION ALL
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SELECT * FROM t2
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ORDER BY a LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
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SELECT * FROM t2
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ORDER BY a LIMIT 8;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
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SELECT * FROM t2
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ORDER BY a LIMIT 8 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION
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(SELECT * FROM t2 LIMIT 4)
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LIMIT 7;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION
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(SELECT * FROM t2 LIMIT 4 OFFSET 2)
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LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
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LIMIT 7;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
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LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION
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(SELECT * FROM t2 LIMIT 4)
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ORDER BY a LIMIT 7;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION
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(SELECT * FROM t2 LIMIT 4 OFFSET 2)
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ORDER BY a LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
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ORDER BY a LIMIT 7;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
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ORDER BY a LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION ALL
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(SELECT * FROM t2 LIMIT 4)
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LIMIT 7;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION ALL
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(SELECT * FROM t2 LIMIT 4 OFFSET 2)
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LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
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LIMIT 7;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
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LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 LIMIT 5) UNION ALL
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(SELECT * FROM t2 LIMIT 4)
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ORDER BY a LIMIT 7;
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(SELECT * FROM t1 LIMIT 5 OFFSET 4) UNION ALL
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(SELECT * FROM t2 LIMIT 4 OFFSET 2)
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ORDER BY a LIMIT 7 OFFSET 1;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
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ORDER BY a LIMIT 7;
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(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
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(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
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ORDER BY a LIMIT 7 OFFSET 1;
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DROP TABLE t1, t2;
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#
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# Test of update and delete with limit
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#
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create table t1 (a int not null default 0 primary key, b int not null default 0);
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insert into t1 () values (); # Testing default values
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insert into t1 values (1,1),(2,1),(3,1);
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update t1 set a=4 where b=1 limit 1;
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select * from t1;
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update t1 set b=2 where b=1 limit 2;
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select * from t1;
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update t1 set b=4 where b=1;
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select * from t1;
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delete from t1 where b=2 limit 1;
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select * from t1;
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delete from t1 limit 1;
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select * from t1;
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drop table t1;
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create table t1 (i int);
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insert into t1 (i) values(1),(1),(1);
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delete from t1 limit 1;
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update t1 set i=2 limit 1;
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delete from t1 limit 0;
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update t1 set i=3 limit 0;
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select * from t1;
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drop table t1;
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# LIMIT 0
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select 0 limit 0;
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#
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# Test with DELETE, ORDER BY and limit (bug #1024)
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#
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CREATE TABLE t1(id int auto_increment primary key, id2 int, index(id2));
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INSERT INTO t1 (id2) values (0),(0),(0);
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DELETE FROM t1 WHERE id=1;
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INSERT INTO t1 SET id2=0;
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SELECT * FROM t1;
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DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
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# should have deleted WHERE id=2
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SELECT * FROM t1;
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DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
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SELECT * FROM t1;
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DROP TABLE t1;
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#
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# Bug#8023 - limit on UNION with from DUAL, causes syntax error
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#
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create table t1 (a integer);
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insert into t1 values (1);
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# both queries must return one row
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select 1 as a from t1 union all select 1 from dual limit 1;
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(select 1 as a from t1) union all (select 1 from dual) limit 1;
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drop table t1;
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#
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# Bug #21787: COUNT(*) + ORDER BY + LIMIT returns wrong result
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#
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create table t1 (a int);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7);
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analyze table t1;
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explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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drop table t1;
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# End of 4.1 tests
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#
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# Bug #28464: a string argument to 'limit ?' PS
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#
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prepare s from "select 1 limit ?";
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set @a='qwe';
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--error ER_WRONG_ARGUMENTS
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execute s using @a;
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set @a=-1;
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--error ER_DATA_OUT_OF_RANGE
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execute s using @a;
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prepare s from "select 1 limit 1, ?";
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--error ER_DATA_OUT_OF_RANGE
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execute s using @a;
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prepare s from "select 1 limit ?, ?";
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--error ER_DATA_OUT_OF_RANGE
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execute s using @a, @a;
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set @a=14632475938453979136;
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execute s using @a, @a;
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set @a=-14632475938453979136;
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--error ER_WRONG_ARGUMENTS
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execute s using @a, @a;
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--echo End of 5.0 tests
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#
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# Bug#37075: offset of limit clause might be truncated to 0 on 32-bits server w/o big tables
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#
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select 1 as a limit 4294967296,10;
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--echo End of 5.1 tests
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--echo # Bug #28961843: COUNT() WITH LIMIT AND OFFSET RETURNS WRONG RESULT
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CREATE TABLE t1 (i INT);
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INSERT INTO t1 VALUES (1);
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SELECT COUNT(*) FROM t1 LIMIT 1 OFFSET 3;
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DROP TABLE t1;
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--echo #
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--echo # Bug #29148115: SIG 6 IN TEMPTABLE::RESULT TEMPTABLE::HANDLER::INDEX_NEXT_CONDITIONAL
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--echo #
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CREATE TABLE t1 (pk INTEGER PRIMARY KEY);
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INSERT INTO t1 VALUES (1);
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SELECT t1.pk FROM (SELECT DISTINCT * FROM t1) AS t1 WHERE t1.pk=1 LIMIT 1 OFFSET 2;
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DROP TABLE t1;
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--echo #
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--echo # Bug #29373972: SIG 6 AT HANDLER::START_PSI_BATCH_MODE()
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--echo #
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#
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# Set up an error that occurs during OFFSET processing, and force the table
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# to be closed so that we verify that it's not stuck in performance schema
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# batch mode.
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#
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set @old_opt_switch=@@optimizer_switch;
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set optimizer_switch='block_nested_loop=off';
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CREATE TABLE t1 ( pk INTEGER );
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INSERT INTO t1 VALUES (1), (2);
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--skip_if_hypergraph # Depends on the query plan.
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EXPLAIN FORMAT=tree SELECT JSON_OBJECTAGG(NULL, '') FROM t1, t1 AS t2 GROUP BY t1.pk LIMIT 2 OFFSET 5;
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--error ER_JSON_DOCUMENT_NULL_KEY
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SELECT JSON_OBJECTAGG(NULL, '') FROM t1, t1 AS t2 GROUP BY t1.pk LIMIT 2 OFFSET 5;
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FLUSH TABLES;
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DROP TABLE t1;
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set optimizer_switch=@old_opt_switch;
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--echo #
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--echo # Bug#29531472: SIG 6 AT JOIN::TEST_SKIP_SORT | SQL_OPTIMIZER.CC
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--echo #
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CREATE TABLE t1 (
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col_int_key INT DEFAULT NULL,
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col_varchar_key VARCHAR(1) DEFAULT NULL,
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KEY idx_CC_col_int_key (col_int_key),
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KEY idx_CC_col_varchar_key (col_varchar_key)
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);
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INSERT INTO t1 VALUES(1,'A');
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SELECT col_varchar_key AS f1
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FROM t1
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WHERE (col_int_key NOT BETWEEN 10 AND 15 OR col_varchar_key < '2') AND col_int_key IS NULL
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GROUP BY f1 LIMIT 100;
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EXPLAIN
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SELECT col_varchar_key AS f1
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FROM t1
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WHERE (col_int_key NOT BETWEEN 10 AND 15 OR col_varchar_key < '2') AND col_int_key IS NULL
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GROUP BY f1 LIMIT 100;
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DROP TABLE t1;
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--echo #
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--echo # Bug#30521803: LIMIT CLAUSE OUTSIDE PARENTHESES CAN SUPPRESS ORDERING
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--echo # CLAUSES INSIDE
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--echo #
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CREATE TEMPORARY TABLE t1 (i INT);
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INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
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--echo # All 3 queries below should return the same result:
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SELECT * FROM (SELECT * FROM t1 ORDER BY i DESC LIMIT 3) AS alias LIMIT 2;
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(SELECT * FROM t1 ORDER BY i DESC LIMIT 3) LIMIT 2;
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WITH cte AS (SELECT 1) (SELECT * FROM t1 ORDER BY i DESC LIMIT 3) LIMIT 2;
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DROP TABLE t1;
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--echo #
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--echo # Bug#30204811 ASSERTION `SELECT_LIMIT > 0' FAILED AT
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--echo # TEST_IF_SKIP_SORT_ORDER
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--echo #
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# Tables are created as myISAM tables as row counts will be reported
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# as 'excact' by myISAM handler. Table B is intentionally left empty to cause
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# 'rows_fetched = 0' to be reported from the handler. This results in
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# the 'fanout' of A join B to be calculated as 0, which triggered the bug:
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#
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# The fanout was used to calculate a modified 'select_limit' for number
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# of rows to be read from the first table. This involved a division-by-zero
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# with fanout, such that 'modified select_limit' became 'infinite'.
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# Storing that (with type cast) into a ha_rows data type is undefined behavior.
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# Thus 'zero' ended up being stored (or possibly just left unassigned)
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CREATE TABLE a (
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col_int int,
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col_varchar_255 varchar(255),
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pk integer auto_increment primary key
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) ENGINE=myisam;
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CREATE TABLE b (
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col_varchar_10 varchar(10),
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pk integer primary key
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) ENGINE=myisam;
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let $query=
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SELECT STRAIGHT_JOIN a.pk
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FROM a
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JOIN b ON a.col_varchar_255 = b.col_varchar_10
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WHERE b.pk <= a.col_int
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ORDER BY a.pk LIMIT 10;
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INSERT INTO a(col_int,col_varchar_255) VALUES (0,""),(1,"");
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##############################
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# Independent of whether there are more or less rows in table A than the
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# specified 'limit', the 'fanout == 0' should result in all rows needed
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# to be read. Thus there are no effective limits.
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--skip_if_hypergraph # Depends on the query plan.
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eval explain format=tree $query;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
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#################################
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# Table A now contains 4096 rows, still all rows should be read.
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--skip_if_hypergraph # Depends on the query plan.
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eval explain format=tree $query;
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DROP TABLE a;
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DROP TABLE b;
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--echo # Bug#31667061: Inconsistent behavior of @@SQL_SELECT_LIMIT
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--echo # with prepared statements
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CREATE TABLE t1(id INTEGER);
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INSERT INTO t1 (id) VALUES (1), (2), (3);
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SET @@sql_select_limit=1;
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PREPARE stmt FROM "SELECT * FROM t1 WHERE id > ?";
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SET @a = 0;
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EXECUTE stmt using @a;
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set @@sql_select_limit=2;
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EXECUTE stmt using @a;
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set @@sql_select_limit=DEFAULT;
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EXECUTE stmt USING @a;
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DEALLOCATE PREPARE stmt;
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DROP TABLE t1;
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CREATE TABLE t1(id INTEGER, c1 INTEGER, c2 INTEGER, c3 INTEGER);
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INSERT INTO t1 VALUES(1,1,1,1),(2,2,2,2),(3,9,9,9),(4,10,10,10),(6,1,2,888);
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PREPARE stmt FROM
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"(SELECT * FROM t1 LIMIT 2) UNION ALL (SELECT * FROM t1 ORDER BY 1)";
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SET @@sql_select_limit=2;
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EXECUTE stmt;
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SET @@sql_select_limit=DEFAULT;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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DROP TABLE t1;
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