add create operator

SQLPGrammar_new.y

@@ -57,15 +57,43 @@ Query
 
 SelectQuery
 	: SELECT Body
+	{
+		printf("SelectQuery 1 \n");
+		$$ = $2;
+	}
 	| SELECT SelectList Body
+	{
+		printf("SelectQuery 2 \n");
+		$$ = create_proj_operator($2, $3);
+	}
 	| SELECT DISTINCT Body
+	{
+		printf("SelectList 3 \n");
+		$$ = $3;
+	}
 	| SELECT DISTINCT SelectList Body
+	{
+		printf("SelectList 4 \n");
+		$$ = create_proj_operator($2, $3);
+	}
 	;
 
 Body
 	: FROM TableList
+	{
+		printf("Body 1 \n");
+		$$ = $2;
+	}
 	| FROM WHERE Pred
+	{
+		printf("Body 2 \n");
+		// todo
+	}
 	| FROM TableList WHERE Pred
+	{
+		printf("Body 3 \n");
+		$$ = create_eval_operator($4, $2);
+	}
 	;
 
 TableList