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63982db93c
Ensure that references in HAVING, ORDER BY or GROUP BY are calculated after fields in SELECT. This will ensure that any reference to these has a valid value. Generalized the code for split_sum_func() BitKeeper/etc/ignore: added support-files/ndb-config-2-node.ini mysql-test/r/group_by.result: More complicated test to assure that rand() is only calulated once mysql-test/r/user_var.result: Back to old results :( (ok but not perfect) mysql-test/t/group_by.test: More complicated test to assure that rand() is only calulated once sql/item.cc: Better bugfix for "HAVING when refering to RAND()" This will ensure that when refering to things like RAND() in HAVING through an alias we will not recalculate that rand() value in the HAVING part but use the value in the row Generalize split_sum_func() sql/item.h: Better bugfix for "HAVING when refering to RAND()" T sql/item_cmpfunc.cc: Better bugfix for "HAVING when refering to RAND()" Use generalized split_sum_func2() function sql/item_func.cc: Better bugfix for "HAVING when refering to RAND()" Use generalized split_sum_func2() function sql/item_row.cc: Better bugfix for "HAVING when refering to RAND()" Use generalized split_sum_func2() function sql/item_strfunc.cc: Better bugfix for "HAVING when refering to RAND()" Use generalized split_sum_func2() function sql/sql_list.h: Add functions to concatenate lists sql/sql_select.cc: Better bugfix for "HAVING when refering to RAND()" Ensure that references in HAVING, ORDER BY or GROUP BY are calculated after fields in SELECT. This will ensure that any reference to these has a valid value.
194 lines
5.7 KiB
Plaintext
194 lines
5.7 KiB
Plaintext
drop table if exists t1,t2;
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set @a := foo;
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ERROR 42S22: Unknown column 'foo' in 'field list'
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set @a := connection_id() + 3;
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select @a - connection_id();
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@a - connection_id()
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3
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set @b := 1;
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select @b;
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@b
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1
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CREATE TABLE t1 ( i int not null, v int not null,index (i));
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insert into t1 values (1,1),(1,3),(2,1);
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create table t2 (i int not null, unique (i));
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insert into t2 select distinct i from t1;
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select * from t2;
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i
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1
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2
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select distinct t2.i,@vv1:=if(sv1.i,1,0),@vv2:=if(sv2.i,1,0),@vv3:=if(sv3.i,1,0), @vv1+@vv2+@vv3 from t2 left join t1 as sv1 on sv1.i=t2.i and sv1.v=1 left join t1 as sv2 on sv2.i=t2.i and sv2.v=2 left join t1 as sv3 on sv3.i=t2.i and sv3.v=3;
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i @vv1:=if(sv1.i,1,0) @vv2:=if(sv2.i,1,0) @vv3:=if(sv3.i,1,0) @vv1+@vv2+@vv3
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1 1 0 1 2
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2 1 0 0 1
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explain select * from t1 where i=@vv1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref i i 4 const 1 Using where
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explain select * from t1 where @vv1:=@vv1+1 and i=@vv1;
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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 3 Using where
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explain select @vv1:=i from t1 where i=@vv1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL i 4 NULL 3 Using where; Using index
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explain select * from t1 where i=@vv1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref i i 4 const 1 Using where
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drop table t1,t2;
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set @a=0,@b=0;
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select @a:=10, @b:=1, @a > @b, @a < @b;
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@a:=10 @b:=1 @a > @b @a < @b
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10 1 1 0
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select @a:="10", @b:="1", @a > @b, @a < @b;
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@a:="10" @b:="1" @a > @b @a < @b
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10 1 1 0
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select @a:=10, @b:=2, @a > @b, @a < @b;
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@a:=10 @b:=2 @a > @b @a < @b
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10 2 0 1
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select @a:="10", @b:="2", @a > @b, @a < @b;
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@a:="10" @b:="2" @a > @b @a < @b
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10 2 1 0
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select @a:=1;
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@a:=1
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1
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select @a, @a:=1;
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@a @a:=1
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1 1
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create table t1 (id int, d double, c char(10));
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insert into t1 values (1,2.0, "test");
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select @c:=0;
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@c:=0
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0
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update t1 SET id=(@c:=@c+1);
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select @c;
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@c
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1
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select @c:=0;
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@c:=0
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0
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update t1 set id=(@c:=@c+1);
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select @c;
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@c
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1
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select @c:=0;
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@c:=0
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0
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select @c:=@c+1;
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@c:=@c+1
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1
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select @d,(@d:=id),@d from t1;
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@d (@d:=id) @d
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NULL 1 1
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select @e,(@e:=d),@e from t1;
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@e (@e:=d) @e
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NULL 2 2
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select @f,(@f:=c),@f from t1;
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@f (@f:=c) @f
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NULL test test
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set @g=1;
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select @g,(@g:=c),@g from t1;
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@g (@g:=c) @g
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1 test test
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select @c, @d, @e, @f;
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@c @d @e @f
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1 1 2 test
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select @d:=id, @e:=id, @f:=id, @g:=@id from t1;
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@d:=id @e:=id @f:=id @g:=@id
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1 1 1 NULL
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select @c, @d, @e, @f, @g;
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@c @d @e @f @g
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1 1 1 1 NULL
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drop table t1;
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select @a:=10, @b:=2, @a>@b, @a:="10", @b:="2", @a>@b, @a:=10, @b:=2, @a>@b, @a:="10", @b:="2", @a>@b;
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@a:=10 @b:=2 @a>@b @a:="10" @b:="2" @a>@b @a:=10 @b:=2 @a>@b @a:="10" @b:="2" @a>@b
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10 2 1 10 2 1 10 2 1 10 2 1
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create table t1 (i int not null);
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insert t1 values (1),(2),(2),(3),(3),(3);
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select @a:=0;
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@a:=0
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0
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select @a, @a:=@a+count(*), count(*), @a from t1 group by i;
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@a @a:=@a+count(*) count(*) @a
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0 1 1 0
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0 2 2 0
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0 3 3 0
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select @a:=0;
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@a:=0
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0
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select @a+0, @a:=@a+0+count(*), count(*), @a+0 from t1 group by i;
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@a+0 @a:=@a+0+count(*) count(*) @a+0
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0 1 1 0
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1 3 2 0
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3 6 3 0
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drop table t1;
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set @a=_latin2'test';
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select charset(@a),collation(@a),coercibility(@a);
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charset(@a) collation(@a) coercibility(@a)
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latin2 latin2_general_ci 3
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select @a=_latin2'TEST';
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@a=_latin2'TEST'
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1
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select @a=_latin2'TEST' collate latin2_bin;
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@a=_latin2'TEST' collate latin2_bin
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0
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set @a=_latin2'test' collate latin2_general_ci;
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select charset(@a),collation(@a),coercibility(@a);
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charset(@a) collation(@a) coercibility(@a)
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latin2 latin2_general_ci 0
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select @a=_latin2'TEST';
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@a=_latin2'TEST'
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1
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select @a=_latin2'TEST' collate latin2_bin;
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ERROR HY000: Illegal mix of collations (latin2_general_ci,EXPLICIT) and (latin2_bin,EXPLICIT) for operation '='
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select charset(@a:=_latin2'test');
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charset(@a:=_latin2'test')
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latin2
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select collation(@a:=_latin2'test');
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collation(@a:=_latin2'test')
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latin2_general_ci
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select coercibility(@a:=_latin2'test');
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coercibility(@a:=_latin2'test')
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3
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select collation(@a:=_latin2'test' collate latin2_bin);
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collation(@a:=_latin2'test' collate latin2_bin)
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latin2_bin
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select coercibility(@a:=_latin2'test' collate latin2_bin);
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coercibility(@a:=_latin2'test' collate latin2_bin)
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0
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select (@a:=_latin2'test' collate latin2_bin) = _latin2'TEST';
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(@a:=_latin2'test' collate latin2_bin) = _latin2'TEST'
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0
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select charset(@a),collation(@a),coercibility(@a);
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charset(@a) collation(@a) coercibility(@a)
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latin2 latin2_bin 0
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select (@a:=_latin2'test' collate latin2_bin) = _latin2'TEST' collate latin2_general_ci;
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ERROR HY000: Illegal mix of collations (latin2_bin,EXPLICIT) and (latin2_general_ci,EXPLICIT) for operation '='
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create table t1 (a varchar(50));
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reset master;
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SET TIMESTAMP=10000;
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SET @`a b`='hello';
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INSERT INTO t1 VALUES(@`a b`);
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set @var1= "';aaa";
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SET @var2=char(ascii('a'));
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insert into t1 values (@var1),(@var2);
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show binlog events from 79;
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Log_name Pos Event_type Server_id Orig_log_pos Info
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master-bin.000001 79 User var 1 79 @`a b`=_latin1 0x68656C6C6F COLLATE latin1_swedish_ci
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master-bin.000001 120 Query 1 120 use `test`; INSERT INTO t1 VALUES(@`a b`)
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master-bin.000001 184 User var 1 184 @`var1`=_latin1 0x273B616161 COLLATE latin1_swedish_ci
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master-bin.000001 226 User var 1 226 @`var2`=_latin1 0x61 COLLATE latin1_swedish_ci
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master-bin.000001 264 Query 1 264 use `test`; insert into t1 values (@var1),(@var2)
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/*!40019 SET @@session.max_insert_delayed_threads=0*/;
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SET @`a b`:=_latin1 0x68656C6C6F COLLATE `latin1_swedish_ci`;
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use test;
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SET TIMESTAMP=10000;
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INSERT INTO t1 VALUES(@`a b`);
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SET @`var1`:=_latin1 0x273B616161 COLLATE `latin1_swedish_ci`;
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SET @`var2`:=_latin1 0x61 COLLATE `latin1_swedish_ci`;
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SET TIMESTAMP=10000;
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insert into t1 values (@var1),(@var2);
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drop table t1;
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set @var= NULL ;
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select FIELD( @var,'1it','Hit') as my_column;
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my_column
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0
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