-- 充电桩订单（t_charging_order）新增「所属公司 / 所属车队」快照列
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-- 目的：充电桩订单列表/汇总支持按公司、车队筛选与展示（订单表冗余归属列 + SQL 直接筛选）
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-- 目标库：charging_pile_order（表 t_charging_order，TBPARTITION BY MOD_HASH(app_user_id) TBPARTITIONS 20）
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-- 数据来源：白名单用户充电建单时取 t_app_user_whitelist 的 company_id / fleet_id 快照；
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-- 历史白名单订单回填见同目录 20260929_charging_order_company_fleet_backfill.sql
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-- 执行方式：
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-- 1) 首选「小节 A」经数据库代理（MyCat 8066）执行，代理会把 DDL 广播到全部物理分表；
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-- 2) 代理不支持分片表 DDL 时，改用「小节 B」直连后端 MySQL 实例执行（存储过程，逐物理分表，幂等）；
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-- 3) 最后执行「小节 C」回查校验。
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-- 幂等说明：小节 A 为裸 ALTER，重复执行会报 Duplicate column，忽略即可（以小节 C 回查为准）；
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-- 小节 B 先查 information_schema 再变更，可重复执行。
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-- 部署提示：必须先执行本脚本再发布订单服务代码；否则列表带公司/车队筛选会报 Column 'company_id' not found。
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-- ============ 小节 A：经代理执行（推荐） ============
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USE `charging_pile_order`;
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ALTER TABLE `t_charging_order`
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ADD COLUMN `company_id` int DEFAULT NULL COMMENT '所属公司ID（建单时白名单用户归属快照，关联t_group_company.id）';
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ALTER TABLE `t_charging_order`
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ADD COLUMN `fleet_id` int DEFAULT NULL COMMENT '所属车队ID（建单时白名单用户归属快照，关联t_fleet.id）';
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ALTER TABLE `t_charging_order` ADD KEY `idx_company_id` (`company_id`);
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ALTER TABLE `t_charging_order` ADD KEY `idx_fleet_id` (`fleet_id`);
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-- ============ 小节 B：直连后端 MySQL 实例执行（代理不可用时分表执行，幂等） ============
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USE `charging_pile_order`;
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DROP PROCEDURE IF EXISTS `add_charging_order_company_fleet`;
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DELIMITER $$
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CREATE PROCEDURE `add_charging_order_company_fleet`()
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BEGIN
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DECLARE done INT DEFAULT 0;
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DECLARE target_table VARCHAR(64);
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DECLARE column_exists INT DEFAULT 0;
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DECLARE index_exists INT DEFAULT 0;
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-- 覆盖逻辑表（若物理存在）与 TBPARTITION 物理分表 t_charging_order_0..N
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DECLARE table_cursor CURSOR FOR
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SELECT t.table_name
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FROM information_schema.tables t
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WHERE t.table_schema = DATABASE()
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AND t.table_name REGEXP '^t_charging_order(_[0-9]+)?$';
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DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
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OPEN table_cursor;
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table_loop: LOOP
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FETCH table_cursor INTO target_table;
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IF done = 1 THEN
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LEAVE table_loop;
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END IF;
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SELECT COUNT(*) INTO column_exists
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FROM information_schema.columns
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WHERE table_schema = DATABASE()
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AND table_name = target_table
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AND column_name = 'company_id';
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IF column_exists = 0 THEN
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SET @ddl = CONCAT('ALTER TABLE `', target_table, '` ADD COLUMN `company_id` int DEFAULT NULL COMMENT ''所属公司ID（建单时白名单用户归属快照，关联t_group_company.id）''');
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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END IF;
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SELECT COUNT(*) INTO column_exists
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FROM information_schema.columns
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WHERE table_schema = DATABASE()
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AND table_name = target_table
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AND column_name = 'fleet_id';
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IF column_exists = 0 THEN
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SET @ddl = CONCAT('ALTER TABLE `', target_table, '` ADD COLUMN `fleet_id` int DEFAULT NULL COMMENT ''所属车队ID（建单时白名单用户归属快照，关联t_fleet.id）''');
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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END IF;
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SELECT COUNT(*) INTO index_exists
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FROM information_schema.statistics
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WHERE table_schema = DATABASE()
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AND table_name = target_table
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AND index_name = 'idx_company_id';
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IF index_exists = 0 THEN
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SET @ddl = CONCAT('ALTER TABLE `', target_table, '` ADD KEY `idx_company_id` (`company_id`)');
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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END IF;
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SELECT COUNT(*) INTO index_exists
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FROM information_schema.statistics
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WHERE table_schema = DATABASE()
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AND table_name = target_table
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AND index_name = 'idx_fleet_id';
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IF index_exists = 0 THEN
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SET @ddl = CONCAT('ALTER TABLE `', target_table, '` ADD KEY `idx_fleet_id` (`fleet_id`)');
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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END IF;
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END LOOP;
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CLOSE table_cursor;
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END$$
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DELIMITER ;
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CALL `add_charging_order_company_fleet`();
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DROP PROCEDURE `add_charging_order_company_fleet`;
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-- ============ 小节 C：回查校验（应看到每个物理分表都存在 company_id / fleet_id 两列） ============
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SELECT t.table_name, c.column_name, c.column_type, c.column_comment
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FROM information_schema.tables t
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JOIN information_schema.columns c
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ON c.table_schema = t.table_schema
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AND c.table_name = t.table_name
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WHERE t.table_schema = DATABASE()
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AND t.table_name REGEXP '^t_charging_order(_[0-9]+)?$'
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AND c.column_name IN ('company_id', 'fleet_id')
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ORDER BY t.table_name, c.column_name;
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SELECT COUNT(DISTINCT t.table_name) AS shard_count,
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SUM(CASE WHEN c.column_name = 'company_id' THEN 1 ELSE 0 END) AS company_id_columns,
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SUM(CASE WHEN c.column_name = 'fleet_id' THEN 1 ELSE 0 END) AS fleet_id_columns
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FROM information_schema.tables t
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JOIN information_schema.columns c
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ON c.table_schema = t.table_schema
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AND c.table_name = t.table_name
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WHERE t.table_schema = DATABASE()
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AND t.table_name REGEXP '^t_charging_order(_[0-9]+)?$'
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AND c.column_name IN ('company_id', 'fleet_id');
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