last_query_cost
摘要：
The total cost of the last compiled query as computed by the query optimizer. This is useful for comparing the cost of different query plans for the same query. The default value of 0 means that no query has been compiled yet. The default value is 0.Last_query_costhas session scope.TheLast_query_cos 阅读全文
posted @ 2014-02-24 21:52 Still water run deep 阅读(830) 评论(0) 推荐(0) 编辑