# Initialise --disable_warnings drop table if exists t1,t2; --enable_warnings --error 1054 set @a := foo; set @a := connection_id() + 3; select @a - connection_id(); set @b := 1; select @b; # Check using and setting variables with SELECT DISTINCT CREATE TABLE t1 ( i int not null, v int not null,index (i)); insert into t1 values (1,1),(1,3),(2,1); create table t2 (i int not null, unique (i)); insert into t2 select distinct i from t1; select * from t2; 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; explain select * from t1 where i=@vv1; explain select * from t1 where @vv1:=@vv1+1 and i=@vv1; explain select @vv1:=i from t1 where i=@vv1; explain select * from t1 where i=@vv1; drop table t1,t2; # Check types of variables set @a=0,@b=0; select @a:=10, @b:=1, @a > @b, @a < @b; # Note that here a and b will be avaluated as number select @a:="10", @b:="1", @a > @b, @a < @b; # Note that here a and b will be avaluated as strings select @a:=10, @b:=2, @a > @b, @a < @b; select @a:="10", @b:="2", @a > @b, @a < @b; # Fixed bug #1194 select @a:=1; select @a, @a:=1; create table t1 (id int, d double, c char(10)); insert into t1 values (1,2.0, "test"); select @c:=0; update t1 SET id=(@c:=@c+1); select @c; select @c:=0; update t1 set id=(@c:=@c+1); select @c; select @c:=0; select @c:=@c+1; select @d,(@d:=id),@d from t1; select @e,(@e:=d),@e from t1; select @f,(@f:=c),@f from t1; set @g=1; select @g,(@g:=c),@g from t1; select @c, @d, @e, @f; select @d:=id, @e:=id, @f:=id, @g:=@id from t1; select @c, @d, @e, @f, @g; drop table t1; # just for fun :) 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; # # bug#1739 # Item_func_set_user_var sets update_query_id, Item_func_get_user_var checks it # create table t1 (i int not null); insert t1 values (1),(2),(2),(3),(3),(3); select @a:=0; select @a, @a:=@a+count(*), count(*), @a from t1 group by i; select @a:=0; select @a+0, @a:=@a+0+count(*), count(*), @a+0 from t1 group by i; drop table t1; # # Bug #2244: User variables didn't copy collation and derivation # attributes from values they were initialized to. # set @a=_latin2'test'; select charset(@a),collation(@a),coercibility(@a); select @a=_latin2'TEST'; select @a=_latin2'TEST' collate latin2_bin; set @a=_latin2'test' collate latin2_general_ci; select charset(@a),collation(@a),coercibility(@a); select @a=_latin2'TEST'; select @a=_latin2'TEST' collate latin2_bin; # # Check the same invoking Item_set_user_var # select charset(@a:=_latin2'test'); select collation(@a:=_latin2'test'); select coercibility(@a:=_latin2'test'); select collation(@a:=_latin2'test' collate latin2_bin); select coercibility(@a:=_latin2'test' collate latin2_bin); select (@a:=_latin2'test' collate latin2_bin) = _latin2'TEST'; select charset(@a),collation(@a),coercibility(@a); select (@a:=_latin2'test' collate latin2_bin) = _latin2'TEST' collate latin2_general_ci; # Check that user variables are binlogged correctly (BUG#3875) create table t1 (a varchar(50)); reset master; SET TIMESTAMP=10000; SET @`a b`='hello'; INSERT INTO t1 VALUES(@`a b`); set @var1= "';aaa"; SET @var2=char(ascii('a')); insert into t1 values (@var1),(@var2); show binlog events from 79; # more important than SHOW BINLOG EVENTS, mysqlbinlog (where we # absolutely need variables names to be quoted and strings to be # escaped). --replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR --exec $MYSQL_BINLOG --short-form $MYSQL_TEST_DIR/var/log/master-bin.000001 drop table t1; # # Bug #6321 strange error: # string function FIELD(<uservariable content NULL>, ...) # set @var= NULL ; select FIELD( @var,'1it','Hit') as my_column; # # Bug#9425 A user variable doesn't always have implicit coercibility # select @v, coercibility(@v); set @v1=null, @v2=1, @v3=1.1, @v4=now(); select coercibility(@v1),coercibility(@v2),coercibility(@v3),coercibility(@v4);