for multy-delete command used same algorithm of table reference (alias)

mysql-test/t/multi_update.test:
  new results of changed multi-delete
mysql-test/t/update.test:
  new results of changed multi-delete
mysql-test/r/multi_update.result:
  new results of changed multi-delete
mysql-test/r/update.result:
  new results of changed multi-delete

mysql-test/r/multi_update.result

@@ -244,7 +244,7 @@ select * from t2;
 n	d
 1	30
 1	30
-DELETE t1, t2  FROM t1 a,t2 b where a.n=b.n;
+DELETE a, b  FROM t1 a,t2 b where a.n=b.n;
 select * from t1;
 n	d
 3	2

mysql-test/r/update.result

@@ -158,7 +158,7 @@ insert into t1 (F1,F2,F3,cnt,groupid) values ('0','0','0',1,6),
 ('0','1','2',1,5), ('0','2','0',1,3), ('1','0','1',1,2),
 ('1','2','1',1,1), ('1','2','2',1,1), ('2','0','1',2,4),
 ('2','2','0',1,7);
-delete from t1 using t1 m1,t1 m2 where m1.groupid=m2.groupid and (m1.cnt < m2.cnt or m1.cnt=m2.cnt and m1.F3>m2.F3);
+delete from m1 using t1 m1,t1 m2 where m1.groupid=m2.groupid and (m1.cnt < m2.cnt or m1.cnt=m2.cnt and m1.F3>m2.F3);
 select * from t1;
 F1	F2	F3	cnt	groupid
 0	0	0	1	6

mysql-test/t/multi_update.test

@@ -218,7 +218,7 @@ select * from t2;
 UPDATE t1 a ,t2 b SET a.d=b.d,b.d=30 WHERE a.n=b.n;
 select * from t1;
 select * from t2;
-DELETE t1, t2  FROM t1 a,t2 b where a.n=b.n;
+DELETE a, b  FROM t1 a,t2 b where a.n=b.n;
 select * from t1;
 select * from t2;
 drop table t1,t2;

mysql-test/t/update.test

@@ -126,6 +126,6 @@ insert into t1 (F1,F2,F3,cnt,groupid) values ('0','0','0',1,6),
 ('1','2','1',1,1), ('1','2','2',1,1), ('2','0','1',2,4),
 ('2','2','0',1,7);
 
-delete from t1 using t1 m1,t1 m2 where m1.groupid=m2.groupid and (m1.cnt < m2.cnt or m1.cnt=m2.cnt and m1.F3>m2.F3);
+delete from m1 using t1 m1,t1 m2 where m1.groupid=m2.groupid and (m1.cnt < m2.cnt or m1.cnt=m2.cnt and m1.F3>m2.F3);
 select * from t1;
 drop table t1;

sql/sql_parse.cc

@@ -2665,9 +2665,8 @@ mysql_execute_command(THD *thd)
       TABLE_LIST *walk;
       for (walk= (TABLE_LIST*) tables; walk; walk= walk->next)
       {
-	if ((!strcmp(auxi->real_name,walk->real_name) ||
-	     !strcmp(auxi->real_name,walk->alias)) &&
-	    !strcmp(walk->db,auxi->db))
+	if (!strcmp(auxi->real_name, walk->alias) &&
+	    !strcmp(walk->db, auxi->db))
 	  break;
       }
       if (!walk)