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f169114042
Now one can use user variables as target for data loaded from file (besides table's columns). Also LOAD DATA got new SET-clause in which one can specify values for table columns as expressions. For example the following is possible: LOAD DATA INFILE 'words.dat' INTO TABLE t1 (a, @b) SET c = @b + 1; This patch also implements new way of replicating LOAD DATA. Now we do it similarly to other queries. We store LOAD DATA query in new Execute_load_query event (which is last in the sequence of events representing LOAD DATA). When we are executing this event we simply rewrite part of query which holds name of file (we use name of temporary file) and then execute it as usual query. In the beggining of this sequence we use Begin_load_query event which is almost identical to Append_file event
126 lines
3.8 KiB
Text
126 lines
3.8 KiB
Text
# Initialise
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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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--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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set @b := 1;
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select @b;
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# Check using and setting variables with SELECT DISTINCT
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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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select @vv1,i,v 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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#
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# bug#1739
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# Item_func_set_user_var sets update_query_id, Item_func_get_user_var checks it
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#
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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; select @a, @a:=@a+count(*), count(*), @a from t1 group by i;
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select @a:=0; select @a+0, @a:=@a+0+count(*), count(*), @a+0 from t1 group by i;
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drop table t1;
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#
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# Bug #2244: User variables didn't copy collation and derivation
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# attributes from values they were initialized to.
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#
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set @a=_latin2'test';
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select charset(@a),collation(@a),coercibility(@a);
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select @a=_latin2'TEST';
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select @a=_latin2'TEST' collate latin2_bin;
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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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select @a=_latin2'TEST';
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select @a=_latin2'TEST' collate latin2_bin;
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#
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# Check the same invoking Item_set_user_var
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#
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select charset(@a:=_latin2'test');
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select collation(@a:=_latin2'test');
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select coercibility(@a:=_latin2'test');
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select collation(@a:=_latin2'test' collate latin2_bin);
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select coercibility(@a:=_latin2'test' collate latin2_bin);
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select (@a:=_latin2'test' collate latin2_bin) = _latin2'TEST';
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select charset(@a),collation(@a),coercibility(@a);
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select (@a:=_latin2'test' collate latin2_bin) = _latin2'TEST' collate latin2_general_ci;
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# Check that user variables are binlogged correctly (BUG#3875)
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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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--replace_column 2 # 5 #
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show binlog events from 98;
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# more important than SHOW BINLOG EVENTS, mysqlbinlog (where we
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# absolutely need variables names to be quoted and strings to be
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# escaped).
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--replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR
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--exec $MYSQL_BINLOG --short-form $MYSQL_TEST_DIR/var/log/master-bin.000001
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drop table t1;
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#
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# Bug #6321 strange error:
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# string function FIELD(<uservariable content NULL>, ...)
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#
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set @var= NULL ;
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select FIELD( @var,'1it','Hit') as my_column;
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