mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 15:50:51 +03:00
a6b88f1431
The task adds a more efficient handling of the queries with ORDER BY order LIMIT n, such that n is small enough and no indexes are used for order.
65 lines
2.2 KiB
Plaintext
65 lines
2.2 KiB
Plaintext
#
|
|
# WL#1393 - ORDER BY with LIMIT tests
|
|
#
|
|
# A big test in a separate file, so that we can run the original
|
|
# order_by test with --debug without timeout.
|
|
#
|
|
# All the sort keys fit in memory, but the addon fields do not.
|
|
#
|
|
CREATE TABLE t1(
|
|
f0 int auto_increment PRIMARY KEY,
|
|
f1 int,
|
|
f2 varchar(200)
|
|
);
|
|
|
|
INSERT INTO t1(f1, f2) VALUES
|
|
(0,"0"),(1,"1"),(2,"2"),(3,"3"),(4,"4"),(5,"5"),
|
|
(6,"6"),(7,"7"),(8,"8"),(9,"9"),(10,"10"),
|
|
(11,"11"),(12,"12"),(13,"13"),(14,"14"),(15,"15"),
|
|
(16,"16"),(17,"17"),(18,"18"),(19,"19"),(20,"20"),
|
|
(21,"21"),(22,"22"),(23,"23"),(24,"24"),(25,"25"),
|
|
(26,"26"),(27,"27"),(28,"28"),(29,"29"),(30,"30"),
|
|
(31,"31"),(32,"32"),(33,"33"),(34,"34"),(35,"35"),
|
|
(36,"36"),(37,"37"),(38,"38"),(39,"39"),(40,"40"),
|
|
(41,"41"),(42,"42"),(43,"43"),(44,"44"),(45,"45"),
|
|
(46,"46"),(47,"47"),(48,"48"),(49,"49"),(50,"50"),
|
|
(51,"51"),(52,"52"),(53,"53"),(54,"54"),(55,"55"),
|
|
(56,"56"),(57,"57"),(58,"58"),(59,"59"),(60,"60"),
|
|
(61,"61"),(62,"62"),(63,"63"),(64,"64"),(65,"65"),
|
|
(66,"66"),(67,"67"),(68,"68"),(69,"69"),(70,"70"),
|
|
(71,"71"),(72,"72"),(73,"73"),(74,"74"),(75,"75"),
|
|
(76,"76"),(77,"77"),(78,"78"),(79,"79"),(80,"80"),
|
|
(81,"81"),(82,"82"),(83,"83"),(84,"84"),(85,"85"),
|
|
(86,"86"),(87,"87"),(88,"88"),(89,"89"),(90,"90"),
|
|
(91,"91"),(92,"92"),(93,"93"),(94,"94"),(95,"95"),
|
|
(96,"96"),(97,"97"),(98,"98"),(99,"99");
|
|
|
|
CREATE TEMPORARY TABLE tmp (f1 int, f2 varchar(20));
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
INSERT INTO tmp SELECT f1,f2 FROM t1;
|
|
INSERT INTO t1(f1,f2) SELECT * FROM tmp;
|
|
|
|
# Test when only sortkeys fits to memory
|
|
set sort_buffer_size= 32768;
|
|
|
|
FLUSH STATUS;
|
|
SHOW SESSION STATUS LIKE 'Sort%';
|
|
|
|
SELECT * FROM t1 ORDER BY f2 LIMIT 100;
|
|
|
|
SHOW SESSION STATUS LIKE 'Sort%';
|
|
|
|
DROP TABLE t1, tmp;
|