-- 三期 PDA 部分拣货释放策略与 A0 共享资源唯一标识。
SET NAMES utf8mb4;

DROP PROCEDURE IF EXISTS phase3_pda_add_column;
DELIMITER $$
CREATE PROCEDURE phase3_pda_add_column(IN p_table VARCHAR(64), IN p_column VARCHAR(64), IN p_ddl TEXT)
BEGIN
  IF NOT EXISTS (
    SELECT 1 FROM information_schema.columns
     WHERE table_schema = DATABASE() AND table_name = p_table AND column_name = p_column
  ) THEN
    SET @phase3_pda_ddl = CONCAT('ALTER TABLE `', p_table, '` ADD COLUMN ', p_ddl);
    PREPARE phase3_pda_stmt FROM @phase3_pda_ddl;
    EXECUTE phase3_pda_stmt;
    DEALLOCATE PREPARE phase3_pda_stmt;
  END IF;
END$$
DELIMITER ;

CALL phase3_pda_add_column('fl_loading_pick_item', 'release_mode',
  '`release_mode` VARCHAR(10) NULL COMMENT ''AUTO按比例释放，MANUAL按人工选择释放'' AFTER `item_status`');
CALL phase3_pda_add_column('fl_loading_pick_item', 'release_location_ids',
  '`release_location_ids` JSON NULL COMMENT ''人工选择释放库位ID；空数组表示明确释放0个'' AFTER `release_mode`');
CALL phase3_pda_add_column('fl_inbound_pallet_allocation', 'reservation_id',
  '`reservation_id` BIGINT UNSIGNED NULL COMMENT ''仓库预占资源唯一ID，A0共享场景用于区分托盘'' AFTER `location_code`');

SET @phase3_pda_index_ddl = IF(
  EXISTS (SELECT 1 FROM information_schema.statistics
           WHERE table_schema = DATABASE() AND table_name = 'fl_inbound_pallet_allocation'
             AND index_name = 'idx_allocation_reservation'),
  'SELECT 1',
  'ALTER TABLE fl_inbound_pallet_allocation ADD INDEX idx_allocation_reservation (reservation_id)');
PREPARE phase3_pda_index_stmt FROM @phase3_pda_index_ddl;
EXECUTE phase3_pda_index_stmt;
DEALLOCATE PREPARE phase3_pda_index_stmt;

DROP PROCEDURE IF EXISTS phase3_pda_add_column;