二期内容提交
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-- 二期库位共享溢出位 A0 增量迁移。
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-- 执行顺序：phase2-pallet-location-schema.sql、本文件。
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-- 普通库位仍保持一托一位；同一租户仓库只有一个 A0，且 A0 可承载多个活动资源。
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SET NAMES utf8mb4;
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USE baiyue_warehouse;
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DROP PROCEDURE IF EXISTS add_location_overflow_column_if_missing;
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DELIMITER $$
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CREATE PROCEDURE add_location_overflow_column_if_missing(
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IN p_table_name VARCHAR(64),
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IN p_column_name VARCHAR(64),
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IN p_column_definition TEXT
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)
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BEGIN
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IF NOT EXISTS (
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SELECT 1 FROM information_schema.columns
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WHERE table_schema = DATABASE()
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AND table_name = p_table_name
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AND column_name = p_column_name
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) THEN
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SET @column_sql = CONCAT(
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'ALTER TABLE `', REPLACE(p_table_name, '`', '``'),
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'` ADD COLUMN `', REPLACE(p_column_name, '`', '``'), '` ', p_column_definition
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);
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PREPARE column_statement FROM @column_sql;
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EXECUTE column_statement;
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DEALLOCATE PREPARE column_statement;
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END IF;
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END$$
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DELIMITER ;
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CALL add_location_overflow_column_if_missing(
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'wh_location', 'shared_overflow',
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'TINYINT(1) NOT NULL DEFAULT 0 COMMENT ''是否为系统共享溢出位 A0'' AFTER max_weight_kg'
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);
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CALL add_location_overflow_column_if_missing(
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'wh_location_reservation', 'shared_overflow',
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'TINYINT(1) NOT NULL DEFAULT 0 COMMENT ''是否使用共享溢出位 A0'' AFTER location_code'
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);
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CALL add_location_overflow_column_if_missing(
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'wh_location_occupancy', 'shared_overflow',
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'TINYINT(1) NOT NULL DEFAULT 0 COMMENT ''是否使用共享溢出位 A0'' AFTER location_code'
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);
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-- 兼容迁移前人工或旧流程已创建的 A0，并将资源快照回填一致。
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UPDATE wh_location
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SET shared_overflow = 1,
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status = 'AVAILABLE'
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WHERE location_code = 'A0' AND deleted = 0;
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UPDATE wh_location_reservation r
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JOIN wh_location l
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ON l.tenant_id = r.tenant_id AND l.id = r.location_id
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SET r.shared_overflow = l.shared_overflow;
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UPDATE wh_location_occupancy o
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JOIN wh_location l
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ON l.tenant_id = o.tenant_id AND l.id = o.location_id
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SET o.shared_overflow = l.shared_overflow;
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DROP PROCEDURE IF EXISTS add_location_overflow_column_if_missing;
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-- 先移除依赖旧生成列的唯一索引，再按普通库位/A0 的不同语义重建。
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SET @schema_name = DATABASE();
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_reservation' AND index_name = 'uk_location_active_reservation') > 0,
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'ALTER TABLE wh_location_reservation DROP INDEX uk_location_active_reservation', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_reservation' AND index_name = 'uk_pallet_active_reservation') > 0,
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'ALTER TABLE wh_location_reservation DROP INDEX uk_pallet_active_reservation', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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ALTER TABLE wh_location_reservation
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MODIFY COLUMN active_reservation TINYINT
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GENERATED ALWAYS AS (
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CASE WHEN reservation_status = 'RESERVED' AND shared_overflow = 0 THEN 1 ELSE NULL END
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) STORED COMMENT '普通库位活动预占唯一标记，A0 返回 NULL';
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_reservation' AND index_name = 'uk_location_active_reservation') = 0,
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'ALTER TABLE wh_location_reservation ADD UNIQUE KEY uk_location_active_reservation (tenant_id, location_id, active_reservation)', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_occupancy' AND index_name = 'uk_location_active_occupancy') > 0,
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'ALTER TABLE wh_location_occupancy DROP INDEX uk_location_active_occupancy', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_occupancy' AND index_name = 'uk_pallet_active_occupancy') > 0,
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'ALTER TABLE wh_location_occupancy DROP INDEX uk_pallet_active_occupancy', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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DROP PROCEDURE IF EXISTS add_location_overflow_column_if_missing;
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DELIMITER $$
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CREATE PROCEDURE add_location_overflow_column_if_missing(
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IN p_table_name VARCHAR(64),
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IN p_column_name VARCHAR(64),
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IN p_column_definition TEXT
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)
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BEGIN
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IF NOT EXISTS (
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SELECT 1 FROM information_schema.columns
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WHERE table_schema = DATABASE()
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AND table_name = p_table_name
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AND column_name = p_column_name
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) THEN
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SET @column_sql = CONCAT(
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'ALTER TABLE `', REPLACE(p_table_name, '`', '``'),
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'` ADD COLUMN `', REPLACE(p_column_name, '`', '``'), '` ', p_column_definition
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);
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PREPARE column_statement FROM @column_sql;
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EXECUTE column_statement;
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DEALLOCATE PREPARE column_statement;
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END IF;
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END$$
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DELIMITER ;
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CALL add_location_overflow_column_if_missing(
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'wh_location_reservation', 'active_pallet_reservation',
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'TINYINT GENERATED ALWAYS AS (CASE WHEN reservation_status = ''RESERVED'' THEN 1 ELSE NULL END) STORED COMMENT ''托盘活动预占唯一标记（包含 A0）'''
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);
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CALL add_location_overflow_column_if_missing(
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'wh_location_occupancy', 'active_location_occupancy',
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'TINYINT GENERATED ALWAYS AS (CASE WHEN occupancy_status = ''OCCUPIED'' AND shared_overflow = 0 THEN 1 ELSE NULL END) STORED COMMENT ''普通库位活动占用唯一标记'''
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);
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CALL add_location_overflow_column_if_missing(
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'wh_location_occupancy', 'active_pallet_occupancy',
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'TINYINT GENERATED ALWAYS AS (CASE WHEN occupancy_status = ''OCCUPIED'' THEN 1 ELSE NULL END) STORED COMMENT ''托盘活动占用唯一标记（包含 A0）'''
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);
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DROP PROCEDURE IF EXISTS add_location_overflow_column_if_missing;
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_reservation' AND index_name = 'uk_pallet_active_reservation') = 0,
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'ALTER TABLE wh_location_reservation ADD UNIQUE KEY uk_pallet_active_reservation (tenant_id, pallet_id, active_pallet_reservation)', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_occupancy' AND index_name = 'uk_location_active_occupancy') = 0,
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'ALTER TABLE wh_location_occupancy ADD UNIQUE KEY uk_location_active_occupancy (tenant_id, location_id, active_location_occupancy)', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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SET @sql = IF((SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema = @schema_name AND table_name = 'wh_location_occupancy' AND index_name = 'uk_pallet_active_occupancy') = 0,
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'ALTER TABLE wh_location_occupancy ADD UNIQUE KEY uk_pallet_active_occupancy (tenant_id, pallet_id, active_pallet_occupancy)', 'SELECT 1');
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PREPARE statement FROM @sql; EXECUTE statement; DEALLOCATE PREPARE statement;
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