What is the bitmap index?
摘要：
示例执行计划： > what does "Bitmap Heap Scan" phase do? A plain indexscan fetches one tuple-pointer at a time from the index,and immediately visits that tupl 阅读全文
posted @ 2017-07-19 15:26 Still water run deep 阅读(383) 评论(0) 推荐(0)
浙公网安备 33010602011771号