2013年7月1日
对PostgreSQL xmax的理解
摘要： xmaxThe identity (transaction ID) of the deleting transaction, or zero for an undeleted row version. It is possible for this column to be nonzero in a visible row version. That usually indicates that the deleting transaction hasn't committed yet, or that an attempted deletion was rolled back.htt 阅读全文
posted @ 2013-07-01 14:01 健哥的数据花园 阅读(2360) 评论(1) 推荐(1)