mysql 查询优化案例
2016-06-03 14:06
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mysql> explain SELECT c.`sn` clientSn,asm.`clientManagerSn`,pry.`productSn`,1 TYPE,pr.`capitalBalance`,pr.`yieldBalance`,pry.`realValueEndDate`,pr.`status` -> FROM `ProductRepayment` pr -> LEFT JOIN `ProductRepay` pry ON pry.`productSn` = pr.`productSn` -> LEFT JOIN `ProductAccess` pa ON pa.`productSn` = pr.`productSn` -> LEFT JOIN `Client` c ON c.`sn` = pr.`clientSn` -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`=pr.`clientSn` -> WHERE pa.`supportTransfer` =2 -> UNION ALL -> SELECT c.`sn` clientSn,asm.`clientManagerSn`,hd.productSn,2,thd.capitalBalance,thd.yieldBalance,thd.settlementDate,IF(thd.status =1 OR thd.status=2,1,2) -> FROM `TransferProduct` tp -> LEFT JOIN `TransferProductHolding` thd ON thd.transferProductSn = tp.sn -> LEFT JOIN `ClientProductHolding` hd ON hd.sn = tp.holdingSn -> LEFT JOIN `Client` c ON c.`sn` = thd.clientSn -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`= c.`sn` -> LEFT JOIN `ProductAccess` pa ON pa.`productSn` = hd.productSn -> WHERE pa.`supportTransfer` =1 -> UNION ALL -> SELECT c.`sn` clientSn,asm.`clientManagerSn`,ch.productSn,3,ch.capitalBalance,ch.yieldBalance,pr.settlementDate,ch.status-1 -> FROM `ClientHolding` ch -> LEFT JOIN `Client` c ON c.`sn` = ch.clientSn -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`= c.`sn` -> LEFT JOIN `ProductAccess` pa ON pa.`productSn` = ch.productSn -> LEFT JOIN `ProductRepay` pr ON pr.`productSn` = pa.`productSn` -> WHERE pa.`supportTransfer` =1 -> UNION ALL -> SELECT c.`sn` clientSn,asm.`clientManagerSn`,ci.productSn,1,ci.investAmount,NULL,NULL,0 -> FROM `ClientInvestOrder` ci -> LEFT JOIN `Client` c ON c.`sn` = ci.clientSn -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`= c.`sn`; +----+--------------+----------------+--------+---------------+---------+---------+-------------------+------+----------------------------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+--------------+----------------+--------+---------------+---------+---------+-------------------+------+----------------------------------------------------+ | 1 | PRIMARY | pr | ALL | NULL | NULL | NULL | NULL | 7081 | NULL | | 1 | PRIMARY | pa | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.pr.productSn | 1 | Using where | | 1 | PRIMARY | pry | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.pr.productSn | 1 | NULL | | 1 | PRIMARY | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.pr.clientSn | 1 | Using index | | 1 | PRIMARY | asm | ALL | NULL | NULL | NULL | NULL | 4618 | Using where; Using join buffer (Block Nested Loop) | | 2 | UNION | tp | ALL | NULL | NULL | NULL | NULL | 53 | NULL | | 2 | UNION | hd | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.tp.holdingSn | 1 | NULL | | 2 | UNION | pa | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.hd.productSn | 1 | Using where | | 2 | UNION | thd | ALL | NULL | NULL | NULL | NULL | 78 | Using where; Using join buffer (Block Nested Loop) | | 2 | UNION | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.thd.clientSn | 1 | Using index | | 2 | UNION | asm | ALL | NULL | NULL | NULL | NULL | 4618 | Using where; Using join buffer (Block Nested Loop) | | 3 | UNION | ch | ALL | NULL | NULL | NULL | NULL | 6426 | NULL | | 3 | UNION | pa | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ch.productSn | 1 | Using where | | 3 | UNION | pr | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ch.productSn | 1 | NULL | | 3 | UNION | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ch.clientSn | 1 | Using index | | 3 | UNION | asm | ALL | NULL | NULL | NULL | NULL | 4618 | Using where; Using join buffer (Block Nested Loop) | | 4 | UNION | ci | ALL | NULL | NULL | NULL | NULL | 7258 | NULL | | 4 | UNION | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ci.clientSn | 1 | Using index | | 4 | UNION | asm | ALL | NULL | NULL | NULL | NULL | 4618 | Using where; Using join buffer (Block Nested Loop) | | NULL | UNION RESULT | <union1,2,3,4> | ALL | NULL | NULL | NULL | NULL | NULL | Using temporary | +----+--------------+----------------+--------+---------------+---------+---------+-------------------+------+----------------------------------------------------+ 20 rows in set (0.00 sec) 创建索引； mysql> create index AssignClientManager_idx1 on AssignClientManager(clientSn); mysql> explain SELECT c.`sn` clientSn,asm.`clientManagerSn`,pry.`productSn`,1 TYPE,pr.`capitalBalance`,pr.`yieldBalance`,pry.`realValueEndDate`,pr.`status` -> FROM `ProductRepayment` pr -> LEFT JOIN `ProductRepay` pry ON pry.`productSn` = pr.`productSn` -> LEFT JOIN `ProductAccess` pa ON pa.`productSn` = pr.`productSn` -> LEFT JOIN `Client` c ON c.`sn` = pr.`clientSn` -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`=pr.`clientSn` -> WHERE pa.`supportTransfer` =2 -> UNION ALL -> SELECT c.`sn` clientSn,asm.`clientManagerSn`,hd.productSn,2,thd.capitalBalance,thd.yieldBalance,thd.settlementDate,IF(thd.status =1 OR thd.status=2,1,2) -> FROM `TransferProduct` tp -> LEFT JOIN `TransferProductHolding` thd ON thd.transferProductSn = tp.sn -> LEFT JOIN `ClientProductHolding` hd ON hd.sn = tp.holdingSn -> LEFT JOIN `Client` c ON c.`sn` = thd.clientSn -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`= c.`sn` -> LEFT JOIN `ProductAccess` pa ON pa.`productSn` = hd.productSn -> WHERE pa.`supportTransfer` =1 -> UNION ALL -> SELECT c.`sn` clientSn,asm.`clientManagerSn`,ch.productSn,3,ch.capitalBalance,ch.yieldBalance,pr.settlementDate,ch.status-1 -> FROM `ClientHolding` ch -> LEFT JOIN `Client` c ON c.`sn` = ch.clientSn -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`= c.`sn` -> LEFT JOIN `ProductAccess` pa ON pa.`productSn` = ch.productSn -> LEFT JOIN `ProductRepay` pr ON pr.`productSn` = pa.`productSn` -> WHERE pa.`supportTransfer` =1 -> UNION ALL -> SELECT c.`sn` clientSn,asm.`clientManagerSn`,ci.productSn,1,ci.investAmount,NULL,NULL,0 -> FROM `ClientInvestOrder` ci -> LEFT JOIN `Client` c ON c.`sn` = ci.clientSn -> LEFT JOIN `AssignClientManager` asm ON asm.`clientSn`= c.`sn`; +----+--------------+----------------+--------+--------------------------+--------------------------+---------+-------------------+------+----------------------------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+--------------+----------------+--------+--------------------------+--------------------------+---------+-------------------+------+----------------------------------------------------+ | 1 | PRIMARY | pr | ALL | NULL | NULL | NULL | NULL | 7081 | NULL | | 1 | PRIMARY | pa | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.pr.productSn | 1 | Using where | | 1 | PRIMARY | pry | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.pr.productSn | 1 | NULL | | 1 | PRIMARY | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.pr.clientSn | 1 | Using index | | 1 | PRIMARY | asm | ref | AssignClientManager_idx1 | AssignClientManager_idx1 | 4 | zjzc.pr.clientSn | 1 | NULL | | 2 | UNION | tp | ALL | NULL | NULL | NULL | NULL | 53 | NULL | | 2 | UNION | hd | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.tp.holdingSn | 1 | NULL | | 2 | UNION | pa | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.hd.productSn | 1 | Using where | | 2 | UNION | thd | ALL | NULL | NULL | NULL | NULL | 78 | Using where; Using join buffer (Block Nested Loop) | | 2 | UNION | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.thd.clientSn | 1 | Using index | | 2 | UNION | asm | ref | AssignClientManager_idx1 | AssignClientManager_idx1 | 4 | zjzc.c.sn | 1 | NULL | | 3 | UNION | ch | ALL | NULL | NULL | NULL | NULL | 6426 | NULL | | 3 | UNION | pa | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ch.productSn | 1 | Using where | | 3 | UNION | pr | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ch.productSn | 1 | NULL | | 3 | UNION | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ch.clientSn | 1 | Using index | | 3 | UNION | asm | ref | AssignClientManager_idx1 | AssignClientManager_idx1 | 4 | zjzc.c.sn | 1 | NULL | | 4 | UNION | ci | ALL | NULL | NULL | NULL | NULL | 7258 | NULL | | 4 | UNION | c | eq_ref | PRIMARY | PRIMARY | 4 | zjzc.ci.clientSn | 1 | Using index | | 4 | UNION | asm | ref | AssignClientManager_idx1 | AssignClientManager_idx1 | 4 | zjzc.c.sn | 1 | NULL | | NULL | UNION RESULT | <union1,2,3,4> | ALL | NULL | NULL | NULL | NULL | NULL | Using temporary | +----+--------------+----------------+--------+--------------------------+--------------------------+---------+-------------------+------+----------------------------------------------------+ 20 rows in set (0.00 sec)
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