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BitKeeper/etc/logging_ok: auto-union Build-tools/mysql-copyright-2: Auto merged include/violite.h: Auto merged innobase/btr/btr0btr.c: Auto merged innobase/buf/buf0buf.c: Auto merged innobase/buf/buf0flu.c: Auto merged innobase/buf/buf0lru.c: Auto merged innobase/dict/dict0dict.c: Auto merged innobase/dict/dict0mem.c: Auto merged innobase/fsp/fsp0fsp.c: Auto merged innobase/fut/fut0lst.c: Auto merged innobase/ha/hash0hash.c: Auto merged innobase/include/buf0buf.ic: Auto merged innobase/include/buf0lru.h: Auto merged innobase/include/data0data.h: Auto merged innobase/include/dict0dict.h: Auto merged innobase/include/dict0mem.h: Auto merged innobase/include/fsp0fsp.h: Auto merged innobase/include/hash0hash.h: Auto merged innobase/include/lock0lock.h: Auto merged innobase/include/log0log.h: Auto merged innobase/include/log0log.ic: Auto merged innobase/include/mem0dbg.ic: Auto merged innobase/include/mem0pool.h: Auto merged innobase/include/mtr0mtr.h: Auto merged innobase/include/sync0rw.h: Auto merged innobase/include/sync0sync.h: Auto merged innobase/include/trx0roll.h: Auto merged innobase/include/trx0trx.h: Auto merged innobase/include/ut0mem.h: Auto merged innobase/lock/lock0lock.c: Auto merged innobase/log/log0log.c: Auto merged innobase/mem/mem0dbg.c: Auto merged innobase/mem/mem0pool.c: Auto merged innobase/mtr/mtr0mtr.c: Auto merged innobase/pars/lexyy.c: Auto merged innobase/pars/pars0opt.c: Auto merged innobase/que/que0que.c: Auto merged innobase/rem/rem0cmp.c: Auto merged innobase/row/row0ins.c: Auto merged innobase/row/row0mysql.c: Auto merged innobase/row/row0upd.c: Auto merged innobase/srv/srv0srv.c: Auto merged innobase/srv/srv0start.c: Auto merged innobase/sync/sync0rw.c: Auto merged innobase/sync/sync0sync.c: Auto merged innobase/thr/thr0loc.c: Auto merged innobase/trx/trx0purge.c: Auto merged innobase/trx/trx0roll.c: Auto merged innobase/trx/trx0sys.c: Auto merged innobase/trx/trx0trx.c: Auto merged innobase/usr/usr0sess.c: Auto merged innobase/ut/ut0mem.c: Auto merged mysql-test/r/func_if.result: Auto merged mysql-test/r/type_date.result: Auto merged mysql-test/t/type_date.test: Auto merged mysql-test/t/type_decimal.test: Auto merged mysys/mf_tempfile.c: Auto merged netware/BUILD/nwbootstrap: Auto merged netware/Makefile.am: Auto merged scripts/mysqld_safe.sh: Auto merged sql/item_cmpfunc.cc: Auto merged mysql-test/t/func_if.test: Auto merged sql/mysqld.cc: Auto merged sql/opt_range.cc: Auto merged sql/sql_acl.cc: Auto merged sql/sql_parse.cc: Auto merged support-files/my-innodb-heavy-4G.cnf.sh: Auto merged Build-tools/Do-compile: Merge with 4.0 Build-tools/mysql-copyright: Merge with 4.0 client/mysqltest.c: Merge with 4.0 include/my_global.h: Merge with 4.0 innobase/buf/buf0rea.c: Merge with 4.0 innobase/data/data0type.c: Merge with 4.0 innobase/ibuf/ibuf0ibuf.c: Merge with 4.0 innobase/include/buf0buf.h: Merge with 4.0 innobase/include/data0type.h: Merge with 4.0 innobase/include/mem0mem.h: Merge with 4.0 innobase/include/mem0mem.ic: Merge with 4.0 innobase/log/log0recv.c: Merge with 4.0 libmysql/libmysql.c: Merge with 4.0 libmysqld/Makefile.am: Merge with 4.0 mysql-test/r/range.result: Merge with 4.0 mysql-test/r/type_decimal.result: Merge with 4.0 mysql-test/t/range.test: Merge with 4.0 netware/BUILD/mwenv: Merge with 4.0 netware/mysql_test_run.c: Merge with 4.0 scripts/mysql_install_db.sh: Merge with 4.0 sql/field.cc: Merge with 4.0 sql/field.h: Merge with 4.0 sql/item_cmpfunc.h: Merge with 4.0 support-files/my-huge.cnf.sh: Merge with 4.0 support-files/my-large.cnf.sh: Merge with 4.0 support-files/my-medium.cnf.sh: Merge with 4.0 support-files/my-small.cnf.sh: Merge with 4.0 support-files/mysql.spec.sh: Merge with 4.0
385 lines
17 KiB
Text
385 lines
17 KiB
Text
#
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# Problem with range optimizer
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#
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--disable_warnings
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drop table if exists t1, t2;
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--enable_warnings
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CREATE TABLE t1 (
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event_date date DEFAULT '0000-00-00' NOT NULL,
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type int(11) DEFAULT '0' NOT NULL,
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event_id int(11) DEFAULT '0' NOT NULL,
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PRIMARY KEY (event_date,type,event_id)
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);
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INSERT INTO t1 VALUES ('1999-07-10',100100,24), ('1999-07-11',100100,25),
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('1999-07-13',100600,0), ('1999-07-13',100600,4), ('1999-07-13',100600,26),
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('1999-07-14',100600,10), ('1999-07-15',100600,16), ('1999-07-15',100800,45),
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('1999-07-15',101000,47), ('1999-07-16',100800,46), ('1999-07-20',100600,5),
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('1999-07-20',100600,27), ('1999-07-21',100600,11), ('1999-07-22',100600,17),
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('1999-07-23',100100,39), ('1999-07-24',100100,39), ('1999-07-24',100500,40),
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('1999-07-25',100100,39), ('1999-07-27',100600,1), ('1999-07-27',100600,6),
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('1999-07-27',100600,28), ('1999-07-28',100600,12), ('1999-07-29',100500,41),
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('1999-07-29',100600,18), ('1999-07-30',100500,41), ('1999-07-31',100500,41),
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('1999-08-01',100700,34), ('1999-08-03',100600,7), ('1999-08-03',100600,29),
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('1999-08-04',100600,13), ('1999-08-05',100500,42), ('1999-08-05',100600,19),
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('1999-08-06',100500,42), ('1999-08-07',100500,42), ('1999-08-08',100500,42),
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('1999-08-10',100600,2), ('1999-08-10',100600,9), ('1999-08-10',100600,30),
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('1999-08-11',100600,14), ('1999-08-12',100600,20), ('1999-08-17',100500,8),
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('1999-08-17',100600,31), ('1999-08-18',100600,15), ('1999-08-19',100600,22),
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('1999-08-24',100600,3), ('1999-08-24',100600,32), ('1999-08-27',100500,43),
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('1999-08-31',100600,33), ('1999-09-17',100100,37), ('1999-09-18',100100,37),
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('1999-09-19',100100,37), ('2000-12-18',100700,38);
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select event_date,type,event_id from t1 WHERE event_date >= "1999-07-01" AND event_date < "1999-07-15" AND (type=100600 OR type=100100) ORDER BY event_date;
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explain select event_date,type,event_id from t1 WHERE type = 100601 and event_date >= "1999-07-01" AND event_date < "1999-07-15" AND (type=100600 OR type=100100) ORDER BY event_date;
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select event_date,type,event_id from t1 WHERE event_date >= "1999-07-01" AND event_date <= "1999-07-15" AND (type=100600 OR type=100100) or event_date >= "1999-07-01" AND event_date <= "1999-07-15" AND type=100099;
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drop table t1;
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CREATE TABLE t1 (
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PAPER_ID smallint(6) DEFAULT '0' NOT NULL,
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YEAR smallint(6) DEFAULT '0' NOT NULL,
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ISSUE smallint(6) DEFAULT '0' NOT NULL,
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CLOSED tinyint(4) DEFAULT '0' NOT NULL,
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ISS_DATE date DEFAULT '0000-00-00' NOT NULL,
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PRIMARY KEY (PAPER_ID,YEAR,ISSUE)
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);
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INSERT INTO t1 VALUES (3,1999,34,0,'1999-07-12'), (1,1999,111,0,'1999-03-23'),
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(1,1999,222,0,'1999-03-23'), (3,1999,33,0,'1999-07-12'),
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(3,1999,32,0,'1999-07-12'), (3,1999,31,0,'1999-07-12'),
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(3,1999,30,0,'1999-07-12'), (3,1999,29,0,'1999-07-12'),
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(3,1999,28,0,'1999-07-12'), (1,1999,40,1,'1999-05-01'),
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(1,1999,41,1,'1999-05-01'), (1,1999,42,1,'1999-05-01'),
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(1,1999,46,1,'1999-05-01'), (1,1999,47,1,'1999-05-01'),
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(1,1999,48,1,'1999-05-01'), (1,1999,49,1,'1999-05-01'),
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(1,1999,50,0,'1999-05-01'), (1,1999,51,0,'1999-05-01'),
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(1,1999,200,0,'1999-06-28'), (1,1999,52,0,'1999-06-28'),
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(1,1999,53,0,'1999-06-28'), (1,1999,54,0,'1999-06-28'),
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(1,1999,55,0,'1999-06-28'), (1,1999,56,0,'1999-07-01'),
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(1,1999,57,0,'1999-07-01'), (1,1999,58,0,'1999-07-01'),
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(1,1999,59,0,'1999-07-01'), (1,1999,60,0,'1999-07-01'),
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(3,1999,35,0,'1999-07-12');
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select YEAR,ISSUE from t1 where PAPER_ID=3 and (YEAR>1999 or (YEAR=1999 and ISSUE>28)) order by YEAR,ISSUE;
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check table t1;
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repair table t1;
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drop table t1;
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CREATE TABLE t1 (
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id int(11) NOT NULL auto_increment,
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parent_id int(11) DEFAULT '0' NOT NULL,
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level tinyint(4) DEFAULT '0' NOT NULL,
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PRIMARY KEY (id),
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KEY parent_id (parent_id),
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KEY level (level)
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);
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INSERT INTO t1 VALUES (1,0,0), (3,1,1), (4,1,1), (8,2,2), (9,2,2), (17,3,2),
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(22,4,2), (24,4,2), (28,5,2), (29,5,2), (30,5,2), (31,6,2), (32,6,2), (33,6,2),
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(203,7,2), (202,7,2), (20,3,2), (157,0,0), (193,5,2), (40,7,2), (2,1,1),
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(15,2,2), (6,1,1), (34,6,2), (35,6,2), (16,3,2), (7,1,1), (36,7,2), (18,3,2),
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(26,5,2), (27,5,2), (183,4,2), (38,7,2), (25,5,2), (37,7,2), (21,4,2),
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(19,3,2), (5,1,1), (179,5,2);
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SELECT * FROM t1 WHERE level = 1 AND parent_id = 1;
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# The following select returned 0 rows in 3.23.8
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SELECT * FROM t1 WHERE level = 1 AND parent_id = 1 order by id;
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drop table t1;
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#
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# Testing of bug in range optimizer with many key parts and > and <
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#
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create table t1(
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Satellite varchar(25) not null,
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SensorMode varchar(25) not null,
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FullImageCornersUpperLeftLongitude double not null,
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FullImageCornersUpperRightLongitude double not null,
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FullImageCornersUpperRightLatitude double not null,
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FullImageCornersLowerRightLatitude double not null,
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index two (Satellite, SensorMode, FullImageCornersUpperLeftLongitude, FullImageCornersUpperRightLongitude, FullImageCornersUpperRightLatitude, FullImageCornersLowerRightLatitude));
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insert into t1 values("OV-3","PAN1",91,-92,40,50);
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insert into t1 values("OV-4","PAN1",91,-92,40,50);
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select * from t1 where t1.Satellite = "OV-3" and t1.SensorMode = "PAN1" and t1.FullImageCornersUpperLeftLongitude > -90.000000 and t1.FullImageCornersUpperRightLongitude < -82.000000;
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drop table t1;
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create table t1 ( aString char(100) not null default "", key aString (aString(10)) );
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insert t1 (aString) values ( "believe in myself" ), ( "believe" ), ("baaa" ), ( "believe in love");
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select * from t1 where aString < "believe in myself" order by aString;
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select * from t1 where aString > "believe in love" order by aString;
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alter table t1 drop key aString;
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select * from t1 where aString < "believe in myself" order by aString;
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select * from t1 where aString > "believe in love" order by aString;
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drop table t1;
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#
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# Problem with binary strings
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#
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CREATE TABLE t1 (
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t1ID int(10) unsigned NOT NULL auto_increment,
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art binary(1) NOT NULL default '',
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KNR char(5) NOT NULL default '',
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RECHNR char(6) NOT NULL default '',
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POSNR char(2) NOT NULL default '',
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ARTNR char(10) NOT NULL default '',
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TEX char(70) NOT NULL default '',
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PRIMARY KEY (t1ID),
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KEY IdxArt (art),
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KEY IdxKnr (KNR),
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KEY IdxArtnr (ARTNR)
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) ENGINE=MyISAM;
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INSERT INTO t1 (art) VALUES ('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),('j'),('J'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),
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('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j'),('j');
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select count(*) from t1 where upper(art) = 'J';
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select count(*) from t1 where art = 'J' or art = 'j';
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select count(*) from t1 where art = 'j' or art = 'J';
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select count(*) from t1 where art = 'j';
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select count(*) from t1 where art = 'J';
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drop table t1;
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#
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# BETWEEN problems
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#
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create table t1 (x int, y int, index(x), index(y));
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insert into t1 (x) values (1),(2),(3),(4),(5),(6),(7),(8),(9);
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update t1 set y=x;
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# between with only one end fixed
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explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 7 and t1.y+0;
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explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 7 and t2.x <= t1.y+0;
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# between with both expressions on both ends
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explain select * from t1, t1 t2 where t1.y = 2 and t2.x between t1.y-1 and t1.y+1;
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explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= t1.y-1 and t2.x <= t1.y+1;
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# equation propagation
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explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 0 and t1.y;
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explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 0 and t2.x <= t1.y;
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# testing IN
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explain select count(*) from t1 where x in (1);
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explain select count(*) from t1 where x in (1,2);
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drop table t1;
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#
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# bug #1172
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#
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CREATE TABLE t1 (key1 int(11) NOT NULL default '0', KEY i1 (key1));
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INSERT INTO t1 VALUES (0),(0),(1),(1);
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CREATE TABLE t2 (keya int(11) NOT NULL default '0', KEY j1 (keya));
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INSERT INTO t2 VALUES (0),(0),(1),(1),(2),(2);
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explain select * from t1, t2 where (t1.key1 <t2.keya + 1) and t2.keya=3;
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DROP TABLE t1,t2;
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#
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# bug #1724: use RANGE on more selective column instead of REF on less
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# selective
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CREATE TABLE t1 (
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a int(11) default NULL,
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b int(11) default NULL,
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KEY a (a),
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KEY b (b)
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) ENGINE=MyISAM;
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INSERT INTO t1 VALUES
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(1,1),(2,1),(3,1),(4,1),(5,1),(6,1),(7,1),(8,1),(9,1),(10,2),(10,2),
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(13,2),(14,2),(15,2),(16,2),(17,3),(17,3),(16,3),(17,3),(19,3),(20,3),
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(21,4),(22,5),(23,5),(24,5),(25,5),(26,5),(30,5),(31,5),(32,5),(33,5),
|
|
(33,5),(33,5),(33,5),(33,5),(34,5),(35,5);
|
|
|
|
# we expect that optimizer will choose index on A
|
|
EXPLAIN SELECT * FROM t1 WHERE a IN(1,2) AND b=5;
|
|
SELECT * FROM t1 WHERE a IN(1,2) AND b=5;
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Test problem with range optimzer and sub ranges
|
|
#
|
|
|
|
CREATE TABLE t1 (a int, b int, c int, INDEX (c,a,b));
|
|
INSERT INTO t1 VALUES (1,0,0),(1,0,0),(1,0,0);
|
|
INSERT INTO t1 VALUES (0,1,0),(0,1,0),(0,1,0);
|
|
# -- First reports 3; second reports 6
|
|
SELECT COUNT(*) FROM t1 WHERE (c=0 and a=1) or (c=0 and b=1);
|
|
SELECT COUNT(*) FROM t1 WHERE (c=0 and b=1) or (c=0 and a=1);
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Test problem with range optimization over overlapping ranges (#2448)
|
|
#
|
|
|
|
CREATE TABLE t1 ( a int not null, b int not null, INDEX ab(a,b) );
|
|
INSERT INTO t1 VALUES (47,1), (70,1), (15,1), (15, 4);
|
|
SELECT * FROM t1
|
|
WHERE
|
|
(
|
|
( b =1 AND a BETWEEN 14 AND 21 ) OR
|
|
( b =2 AND a BETWEEN 16 AND 18 ) OR
|
|
( b =3 AND a BETWEEN 15 AND 19 ) OR
|
|
(a BETWEEN 19 AND 47)
|
|
);
|
|
DROP TABLE t1;
|
|
|
|
#
|
|
# Test of problem with IN on many different keyparts. (Bug #4157)
|
|
#
|
|
|
|
CREATE TABLE t1 (
|
|
id int( 11 ) unsigned NOT NULL AUTO_INCREMENT ,
|
|
line int( 5 ) unsigned NOT NULL default '0',
|
|
columnid int( 3 ) unsigned NOT NULL default '0',
|
|
owner int( 3 ) unsigned NOT NULL default '0',
|
|
ordinal int( 3 ) unsigned NOT NULL default '0',
|
|
showid smallint( 6 ) unsigned NOT NULL default '1',
|
|
tableid int( 1 ) unsigned NOT NULL default '1',
|
|
content int( 5 ) unsigned NOT NULL default '188',
|
|
PRIMARY KEY ( owner, id ) ,
|
|
KEY menu( owner, showid, columnid ) ,
|
|
KEY `COLUMN` ( owner, columnid, line ) ,
|
|
KEY `LINES` ( owner, tableid, content, id ) ,
|
|
KEY recount( owner, line )
|
|
) ENGINE = MYISAM;
|
|
|
|
INSERT into t1 (owner,id,columnid,line) values (11,15,15,1),(11,13,13,5);
|
|
|
|
SELECT id, columnid, tableid, content, showid, line, ordinal FROM t1 WHERE owner=11 AND ((columnid IN ( 15, 13, 14 ) AND line IN ( 1, 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 31 )) OR (columnid IN ( 13, 14 ) AND line IN ( 15 ))) LIMIT 0 , 30;
|
|
drop table t1;
|
|
|
|
#
|
|
# test for a bug with in() and unique key
|
|
#
|
|
|
|
create table t1 (id int(10) primary key);
|
|
insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
|
|
select id from t1 where id in (2,5,9) ;
|
|
select id from t1 where id=2 or id=5 or id=9 ;
|
|
drop table t1;
|
|
create table t1 ( id1 int not null, id2 int not null, idnull int null, c char(20), primary key (id1,id2));
|
|
insert into t1 values (0,1,NULL,"aaa"), (1,1,NULL,"aaa"), (2,1,NULL,"aaa"),
|
|
(3,1,NULL,"aaa"), (4,1,NULL,"aaa"), (5,1,NULL,"aaa"),
|
|
(6,1,NULL,"aaa"), (7,1,NULL,"aaa"), (8,1,NULL,"aaa"),
|
|
(9,1,NULL,"aaa"), (10,1,NULL,"aaa"), (11,1,NULL,"aaa"),
|
|
(12,1,NULL,"aaa"), (13,1,NULL,"aaa"), (14,1,NULL,"aaa"),
|
|
(15,1,NULL,"aaa"), (16,1,NULL,"aaa"), (17,1,NULL,"aaa"),
|
|
(18,1,NULL,"aaa"), (19,1,NULL,"aaa"), (20,1,NULL,"aaa");
|
|
select a.id1, b.idnull from t1 as a, t1 as b where a.id2=1 and a.id1=1 and b.id1=a.idnull order by b.id2 desc limit 1;
|
|
drop table t1;
|
|
|
|
|
|
#
|
|
# Problem with optimizing !=
|
|
#
|
|
|
|
create table t1 (
|
|
id int not null auto_increment,
|
|
name char(1) not null,
|
|
uid int not null,
|
|
primary key (id),
|
|
index uid_index (uid));
|
|
|
|
create table t2 (
|
|
id int not null auto_increment,
|
|
name char(1) not null,
|
|
uid int not null,
|
|
primary key (id),
|
|
index uid_index (uid));
|
|
|
|
insert into t1(id, uid, name) values(1, 0, ' ');
|
|
insert into t1(uid, name) values(0, ' ');
|
|
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t2(uid, name) select uid, name from t1;
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
|
|
delete from t2;
|
|
insert into t2(uid, name) values
|
|
(1, CHAR(64+1)),
|
|
(2, CHAR(64+2)),
|
|
(3, CHAR(64+3)),
|
|
(4, CHAR(64+4)),
|
|
(5, CHAR(64+5)),
|
|
(6, CHAR(64+6)),
|
|
(7, CHAR(64+7)),
|
|
(8, CHAR(64+8)),
|
|
(9, CHAR(64+9)),
|
|
(10, CHAR(64+10)),
|
|
(11, CHAR(64+11)),
|
|
(12, CHAR(64+12)),
|
|
(13, CHAR(64+13)),
|
|
(14, CHAR(64+14)),
|
|
(15, CHAR(64+15)),
|
|
(16, CHAR(64+16)),
|
|
(17, CHAR(64+17)),
|
|
(18, CHAR(64+18)),
|
|
(19, CHAR(64+19)),
|
|
(20, CHAR(64+20)),
|
|
(21, CHAR(64+21)),
|
|
(22, CHAR(64+22)),
|
|
(23, CHAR(64+23)),
|
|
(24, CHAR(64+24)),
|
|
(25, CHAR(64+25)),
|
|
(26, CHAR(64+26));
|
|
|
|
insert into t1(uid, name) select uid, name from t2;
|
|
|
|
delete from t2;
|
|
insert into t2(id, uid, name) select id, uid, name from t1;
|
|
|
|
select count(*) from t1;
|
|
select count(*) from t2;
|
|
|
|
explain select * from t1, t2 where t1.uid=t2.uid AND t1.uid > 0;
|
|
explain select * from t1, t2 where t1.uid=t2.uid AND t1.uid != 0;
|
|
|
|
select * from t1, t2 where t1.uid=t2.uid AND t1.uid > 0;
|
|
select * from t1, t2 where t1.uid=t2.uid AND t1.uid != 0;
|
|
|
|
drop table t1,t2;
|