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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
#
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# WL#1393 - ORDER BY with LIMIT tests
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#
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# A big test in a separate file, so that we can run the original
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# order_by test with --debug without timeout.
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#
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# All the sort keys fit in memory, but the addon fields do not.
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#
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CREATE TABLE t1(
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f0 int auto_increment PRIMARY KEY,
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f1 int,
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f2 varchar(200)
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);
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INSERT INTO t1(f1, f2) VALUES
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(0,"0"),(1,"1"),(2,"2"),(3,"3"),(4,"4"),(5,"5"),
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(6,"6"),(7,"7"),(8,"8"),(9,"9"),(10,"10"),
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(11,"11"),(12,"12"),(13,"13"),(14,"14"),(15,"15"),
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(16,"16"),(17,"17"),(18,"18"),(19,"19"),(20,"20"),
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(21,"21"),(22,"22"),(23,"23"),(24,"24"),(25,"25"),
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(26,"26"),(27,"27"),(28,"28"),(29,"29"),(30,"30"),
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(31,"31"),(32,"32"),(33,"33"),(34,"34"),(35,"35"),
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(36,"36"),(37,"37"),(38,"38"),(39,"39"),(40,"40"),
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(41,"41"),(42,"42"),(43,"43"),(44,"44"),(45,"45"),
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(46,"46"),(47,"47"),(48,"48"),(49,"49"),(50,"50"),
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(51,"51"),(52,"52"),(53,"53"),(54,"54"),(55,"55"),
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(56,"56"),(57,"57"),(58,"58"),(59,"59"),(60,"60"),
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(61,"61"),(62,"62"),(63,"63"),(64,"64"),(65,"65"),
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(66,"66"),(67,"67"),(68,"68"),(69,"69"),(70,"70"),
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(71,"71"),(72,"72"),(73,"73"),(74,"74"),(75,"75"),
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(76,"76"),(77,"77"),(78,"78"),(79,"79"),(80,"80"),
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(81,"81"),(82,"82"),(83,"83"),(84,"84"),(85,"85"),
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(86,"86"),(87,"87"),(88,"88"),(89,"89"),(90,"90"),
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(91,"91"),(92,"92"),(93,"93"),(94,"94"),(95,"95"),
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(96,"96"),(97,"97"),(98,"98"),(99,"99");
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CREATE TEMPORARY TABLE tmp (f1 int, f2 varchar(20));
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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INSERT INTO tmp SELECT f1,f2 FROM t1;
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INSERT INTO t1(f1,f2) SELECT * FROM tmp;
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# Test when only sortkeys fits to memory
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set sort_buffer_size= 32768;
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FLUSH STATUS;
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SHOW SESSION STATUS LIKE 'Sort%';
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SELECT * FROM t1 ORDER BY f2 LIMIT 100;
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SHOW SESSION STATUS LIKE 'Sort%';
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DROP TABLE t1, tmp;
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