{"body":"MySQL [nova_api]> EXPLAIN SELECT DISTINCT instance_mappings.cell_id FROM instance_mappings WHERE instance_mappings.project_id = '86bbbcfa8ad043109d2d7af530225c72';\n+----+-------------+-------------------+------------+------+------------------------+----------------+---------+-------+---------+----------+----------------------------------------+\n| id | select_type | table             | partitions | type | possible_keys          | key            | key_len | ref   | rows    | filtered | Extra                                  |\n+----+-------------+-------------------+------------+------+------------------------+----------------+---------+-------+---------+----------+----------------------------------------+\n|  1 | SIMPLE      | instance_mappings | NULL       | ref  | cell_id,project_id_idx | project_id_idx | 767     | const | 1262660 |   100.00 | Using index condition; Using temporary |\n+----+-------------+-------------------+------------+------+------------------------+----------------+---------+-------+---------+----------+----------------------------------------+","name":"","extension":"txt","url":"https://www.irccloud.com/pastebin/MftvYe3g","modified":1589570948,"id":"MftvYe3g","size":1078,"lines":6,"own_paste":false,"theme":"","date":1589570948}