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2985e91acd
Use forced close of socket to make mysqld shutdown faster when used under valgrind mysql-test/mysql-test-run.sh: Added --skip-bdb for valgrind mysql-test/r/user_var.result: Extended test for user variables mysql-test/t/user_var.test: Extended test for user variables sql/item_func.cc: Optimized code for setting user variables with := and fixed some bugs in old code sql/item_func.h: Optimized code for setting user variables sql/log.cc: Fixed comments sql/mysqld.cc: Use forced close of socket to make mysqld shutdown faster when used under valgrind sql/sql_class.h: Optimized code for setting user variables
55 lines
1.8 KiB
Text
55 lines
1.8 KiB
Text
error 1054;
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set @a := foo;
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set @a := connection_id() + 3;
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select @a - connection_id();
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# Check using and setting variables with SELECT DISTINCT
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drop table if exists t1,t2;
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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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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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explain select * from t1 where i=@vv1;
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explain select * from t1 where @vv1:=@vv1+1 and i=@vv1;
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explain select @vv1:=i from t1 where i=@vv1;
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explain select * from t1 where i=@vv1;
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drop table t1,t2;
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# Check types of variables
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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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# Note that here a and b will be avaluated as number
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select @a:="10", @b:="1", @a > @b, @a < @b;
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# Note that here a and b will be avaluated as strings
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select @a:=10, @b:=2, @a > @b, @a < @b;
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select @a:="10", @b:="2", @a > @b, @a < @b;
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# Fixed bug #1194
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select @a:=1;
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select @a, @a:=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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update t1 SET id=(@c:=@c+1);
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select @c;
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select @c:=0;
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update t1 set id=(@c:=@c+1);
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select @c;
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select @c:=0;
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select @c:=@c+1;
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select @d,(@d:=id),@d from t1;
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select @e,(@e:=d),@e from t1;
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select @f,(@f:=c),@f from t1;
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set @g=1;
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select @g,(@g:=c),@g from t1;
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select @c, @d, @e, @f;
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select @d:=id, @e:=id, @f:=id, @g:=@id from t1;
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select @c, @d, @e, @f, @g;
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drop table t1;
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# just for fun :)
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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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