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Noteworthy: - New HANDLER code - New multi-update-grant-check code - Table lock code in ha_innodb.cc was not applied BitKeeper/etc/logging_ok: auto-union BitKeeper/deleted/.del-ctype-latin1_de.c~c5d8f9208bceb98e: Auto merged Build-tools/mysql-copyright-2: Auto merged acinclude.m4: Auto merged client/mysqladmin.c: Auto merged client/mysqldump.c: Auto merged include/config-win.h: Auto merged include/my_global.h: Auto merged include/myisam.h: Auto merged innobase/btr/btr0btr.c: Auto merged innobase/buf/buf0buf.c: Auto merged ltmain.sh: Auto merged innobase/dict/dict0dict.c: Auto merged innobase/fsp/fsp0fsp.c: Auto merged innobase/include/dict0dict.h: Auto merged innobase/include/row0mysql.h: Auto merged innobase/log/log0log.c: Auto merged innobase/log/log0recv.c: Auto merged innobase/pars/pars0opt.c: Auto merged innobase/row/row0row.c: Auto merged innobase/sync/sync0arr.c: Auto merged innobase/ut/ut0dbg.c: Auto merged myisam/mi_check.c: Auto merged myisam/mi_close.c: Auto merged myisam/mi_create.c: Auto merged myisam/mi_locking.c: Auto merged myisam/myisampack.c: Auto merged mysql-test/r/delete.result: Auto merged mysql-test/r/func_if.result: Auto merged Build-tools/mysql-copyright: Merge with 4.0 (too most of the code from 4.0) Makefile.am: merge client/mysql.cc: Used 4.1 code configure.in: merge innobase/os/os0file.c: merge innobase/row/row0mysql.c: merge mysql-test/r/ctype_latin1_de.result: merge mysql-test/r/flush_table.result: merge mysql-test/r/func_str.result: merge mysql-test/r/handler.result: merge mysql-test/r/multi_update.result: merge mysql-test/r/type_timestamp.result: Removed testing of 'new' mode, as this is only relevant for 4.0 mysql-test/r/update.result: merge mysql-test/t/delete.test: merge mysql-test/t/flush_table.test: merge mysql-test/t/func_str.test: merge mysql-test/t/handler.test: merge mysql-test/t/multi_update.test: merge mysql-test/t/type_timestamp.test: Removed testing of 'new' mode, as this is only relevant for 4.0 mysql-test/t/update.test: merge mysys/errors.c: merge mysys/my_fstream.c: merge mysys/my_pread.c: merge mysys/my_write.c: merge mysys/mysys_priv.h: merge scripts/mysqlhotcopy.sh: merge sql/field.cc: Keep code from 4.1 sql/field.h: Keep code from 4.1 sql/ha_innodb.cc: Don't merge lock code from 4.0; Heikki will look at this sql/ha_myisam.cc: merge sql/handler.cc: merge sql/item_cmpfunc.cc: merge sql/item_cmpfunc.h: merge sql/item_strfunc.cc: merge sql/mysql_priv.h: merge sql/mysqld.cc: merge sql/protocol.cc: merge sql/records.cc: merge sql/repl_failsafe.cc: merge mysql-test/r/lock_multi.result: merge mysql-test/t/ctype_latin1_de.test: merge mysql-test/t/func_if.test: merge mysql-test/t/lock_multi.test: merge sql/repl_failsafe.h: merge Remove unnessessary header protection sql/slave.h: merge sql/sql_acl.cc: merge sql/sql_base.cc: merge sql/sql_cache.cc: auto merge sql/sql_class.cc: merge sql/sql_class.h: merge sql/sql_delete.cc: merge sql/sql_handler.cc: Get new HANDLER code into 4.1 sql/sql_parse.cc: Keep old file sql/sql_repl.cc: merge sql/sql_repl.h: merge sql/sql_show.cc: merge sql/sql_table.cc: merge sql/sql_union.cc: Applied the examine_rows bug fix from 4.0 by hand sql/sql_update.cc: New multi-update-grant-check code from 4.0 sql/sql_yacc.yy: New multi-update-grant-check code from 4.0 sql/stacktrace.c: merge sql/table.h: merge
88 lines
2.4 KiB
Text
88 lines
2.4 KiB
Text
drop table if exists t1;
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select IF(0,"ERROR","this"),IF(1,"is","ERROR"),IF(NULL,"ERROR","a"),IF(1,2,3)|0,IF(1,2.0,3.0)+0 ;
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IF(0,"ERROR","this") IF(1,"is","ERROR") IF(NULL,"ERROR","a") IF(1,2,3)|0 IF(1,2.0,3.0)+0
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this is a 2 2.0
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CREATE TABLE t1 (st varchar(255) NOT NULL, u int(11) NOT NULL) ENGINE=MyISAM;
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INSERT INTO t1 VALUES ('a',1),('A',1),('aa',1),('AA',1),('a',1),('aaa',0),('BBB',0);
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select if(1,st,st) s from t1 order by s;
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s
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a
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A
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a
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aa
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AA
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aaa
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BBB
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select if(u=1,st,st) s from t1 order by s;
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s
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a
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A
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a
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aa
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AA
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aaa
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BBB
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select if(u=1,binary st,st) s from t1 order by s;
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s
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A
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AA
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BBB
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a
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a
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aa
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aaa
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select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
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s
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A
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AA
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a
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a
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aa
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aaa
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explain extended select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where; Using filesort
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Warnings:
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Note 1003 select if((test.t1.u = 1),test.t1.st,cast(test.t1.st as char charset binary)) AS `s` from test.t1 where (test.t1.st like _latin1'%a%') order by if((test.t1.u = 1),test.t1.st,cast(test.t1.st as char charset binary))
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select nullif(u=0, 'test') from t1;
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nullif(u=0, 'test')
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NULL
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NULL
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NULL
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NULL
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NULL
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1
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1
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explain extended select nullif(u=0, 'test') from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 7
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Warnings:
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Note 1003 select nullif((test.t1.u = 0),_latin1'test') AS `nullif(u=0, 'test')` from test.t1
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drop table t1;
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select NULLIF(NULL,NULL), NULLIF(NULL,1), NULLIF(NULL,1.0), NULLIF(NULL,"test");
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NULLIF(NULL,NULL) NULLIF(NULL,1) NULLIF(NULL,1.0) NULLIF(NULL,"test")
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NULL NULL NULL NULL
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select NULLIF(1,NULL), NULLIF(1.0, NULL), NULLIF("test", NULL);
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NULLIF(1,NULL) NULLIF(1.0, NULL) NULLIF("test", NULL)
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1 1.0 test
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create table t1 (num double(12,2));
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insert into t1 values (144.54);
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select sum(if(num is null,0.00,num)) from t1;
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sum(if(num is null,0.00,num))
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144.54
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drop table t1;
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create table t1 (x int, y int);
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insert into t1 values (0,6),(10,16),(20,26),(30,10),(40,46),(50,56);
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select min(if(y -x > 5,y,NULL)), max(if(y - x > 5,y,NULL)) from t1;
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min(if(y -x > 5,y,NULL)) max(if(y - x > 5,y,NULL))
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6 56
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drop table t1;
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create table t1 (a int);
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insert t1 values (1),(2);
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select if(1>2,a,avg(a)) from t1;
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if(1>2,a,avg(a))
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1.5000
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drop table t1;
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SELECT NULLIF(5,5) IS NULL, NULLIF(5,5) IS NOT NULL;
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NULLIF(5,5) IS NULL NULLIF(5,5) IS NOT NULL
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1 0
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