add grammar rules

SQLPGrammar_new.y

@@ -38,11 +38,6 @@ Query
 		printf("Query 1\n");
 		$$ = $1;
 	}
-	| UnionQuery LIMIT INTEGER // remove this case
-	{
-		printf("Query 2\n");
-		$$ = create_limit_operator($1, $3);
-	}
 	| SelectQuery
 	{
 		printf("Query 3\n");
@@ -56,8 +51,9 @@ Query
 	;
 
 SelectQuery
-// maybe 2 more cases select/select SelectList
-	: SELECT Body
+	: SELECT
+	: SELECT SelectList
+	| SELECT Body
 	{
 		printf("SelectQuery 1 \n");
 		$$ = $2;