sqlyog 的bug ，SELECT ROW_COUNT() 返回-1

mysql> INSERT IGNORE INTO b(c1,c2)VALUES(144,100);SELECT ROW_COUNT();Query OK, 1 row affected (0.00 sec)+-------------+| ROW_COUNT() |+-------------+|           1 |+-------------+1 row in set (0.00 sec)

在sqlyog 工具里，SELECT ROW_COUNT(); 永远都返回-1
应该是个bug