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在 MySQL 中,`update join` 語句中使用 `order by` 會導致什么問題?


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小浪云 2024-11-09 214

在 MySQL 中,`update join` 語句中使用 `order by` 會導致什么問題?

mysql 中,update join 語句中包含 order by 會導致 mysql 崩潰嗎?

問題

在使用 update join 語句時,加入 order by 會導致 mysql 崩潰。原因不明,求助大神。

建表語句

-- `lebon-infra-dev`.cfg_dev_network_push_status definition  create table `cfg_dev_network_push_status` (   `id` bigint not null auto_increment comment '流水號  | 與id為同一字段,自增數列',   `task_id` varchar(16) not null comment '任務id',   `push_status` char(1) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '0' comment '推送狀態(0:待推送/1:已推送/2:已取消)',   `push_plan_time` char(14) character set utf8mb4 collate utf8mb4_0900_ai_ci not null comment '預約推送時間(yyyymmddhhmmss)',   `push_type` char(1) not null comment '推送種類(1:推送配置項/2:推送優先度/3:推送重啟命令)',   `dev_id` varchar(32) not null comment '設備id',   `config_group_id` varchar(16) not null comment '配置組id',   `config_item_id` varchar(16) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '配置項id',   `push_begin_time` char(17) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '00000000000000000' comment '推送開始時間(yyyymmddhhmmssfff)',   `push_end_time` char(17) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '00000000000000000' comment '推送結束時間(yyyymmddhhmmssfff)',   `push_duration_s` int not null default '0' comment '推送耗時',   `push_result` char(1) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '推送結果0:成功/1:失敗',   `fail_reason` varchar(128) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '失敗原因',   `push_retry_times` int not null default '0' comment '重試次數',   `remark` varchar(256) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '備注',   `del_flag` char(1) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '0' comment '刪除狀態',   `version` int not null default '0' comment '版本鎖',   `create_by` varchar(32) character set utf8mb4 collate utf8mb4_0900_ai_ci not null comment '創建人',   `create_time` datetime not null comment '創建時間',   `update_by` varchar(32) character set utf8mb4 collate utf8mb4_0900_ai_ci default null comment '更新人',   `update_time` datetime default null comment '更新時間',   primary key (`id`),   unique key `cfg_dev_network_push_status_un` (`id`) using btree ) engine=innodb auto_increment=149 default charset=utf8mb4 collate=utf8mb4_0900_ai_ci comment='配置-終端網絡配置推送狀態';  -- `lebon-infra-dev`.cfg_dev_network_bind_status definition  create table `cfg_dev_network_bind_status` (   `id` bigint not null auto_increment comment '任務id | 與id為同一字段,自增數列',   `dev_id` varchar(32) not null comment '設備id',   `config_group_id` varchar(16) not null comment '配置組id',   `config_group_name` varchar(32) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '配置組名',   `status` char(1) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '0' comment '狀態',   `push_plan_time` char(14) character set utf8mb4 collate utf8mb4_0900_ai_ci not null comment '預約推送時間(yyyymmddhhmmss)',   `push_begin_time` char(17) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '00000000000000000' comment '推送開始時間(yyyymmddhhmmssfff)',   `push_end_time` char(17) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '00000000000000000' comment '推送結束時間(yyyymmddhhmmssfff)',   `push_duration_s` int not null default '0' comment '推送耗時',   `effective_time` char(17) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '00000000000000000' comment '實際生效時間(yyyymmddhhmmssfff)',   `invalid_time` char(17) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '00000000000000000' comment '實際失效時間(yyyymmddhhmmssfff)',   `fail_reason` varchar(128) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '失敗原因',   `cancel_reason` varchar(128) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '取消原因',   `operator` varchar(32) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '操作者',   `remark` varchar(256) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '' comment '備注',   `version` int not null default '0' comment '版本鎖',   `del_flag` char(1) character set utf8mb4 collate utf8mb4_0900_ai_ci not null default '0' comment '刪除狀態',   `create_by` varchar(32) character set utf8mb4 collate utf8mb4_0900_ai_ci not null comment '創建人',   `create_time` datetime not null comment '創建時間',   `update_by` varchar(32) character set utf8mb4 collate utf8mb4_0900_ai_ci default null comment '更新人',   `update_time` datetime default null comment '更新時間',   primary key (`id`) using btree,   unique key `cfg_dev_network_bind_status_un` (`id`) using btree ) engine=innodb auto_increment=1070 default charset=utf8mb4 collate=utf8mb4_0900_ai_ci comment='配置-終端網絡配置綁定狀態';
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答案

mysql 中,update join 語句中不允許包含 order by,否則會報錯 incorrect usage of update and order by。

原因

update join 語句的含義是更新加入另一個表中滿足條件的行。當使用 order by 時,mysql 無法確定哪個行應該被更新。

解決方案

要避免此錯誤,可以將 order by 移到子查詢或使用笛卡爾乘積:

update     cfg_dev_network_push_status set     push_retry_times = push_retry_times + 1,
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