内容摘要:复制mysql>explainpartitionsselectcount(1)fromuser_partitionwhereidin(1,2,3,4,5); +----+-

复制mysql> explain partitions select count(1) from user_partition where id in (1,老司
2,3,4,5); +----+-------------+----------------+------------+-------+---------------+---------+---------+------+------+--------------------------+ | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | Extra | | 1 | SIMPLE | user_partition | p1,p4 | range | PRIMARY | PRIMARY | 8 | | 5 | Using where; Using index | 1 row in set (0.00 sec) 1.2.3.4.5.