-- PDA 已拣满库位精确释放的持久化幂等契约；可在二期库位表建表后重复执行。
SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS wh_pallet_location_release_operation (
  id BIGINT UNSIGNED NOT NULL COMMENT '精确释放幂等操作ID',
  tenant_id BIGINT UNSIGNED NOT NULL COMMENT '仓储公共资源作用域，固定为0',
  source_service VARCHAR(40) NOT NULL COMMENT '来源服务',
  business_id BIGINT UNSIGNED NOT NULL COMMENT '入库单ID',
  idempotency_key VARCHAR(128) NOT NULL COMMENT '调用方幂等键',
  request_hash CHAR(64) NOT NULL COMMENT '规范化请求SHA-256摘要',
  operation_status VARCHAR(20) NOT NULL DEFAULT 'PROCESSING' COMMENT 'PROCESSING处理中，COMPLETED已完成',
  response_snapshot JSON NULL COMMENT '完成后的精确释放结果快照，用于重复请求重放',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  completed_at DATETIME(3) NULL COMMENT '完成时间',
  PRIMARY KEY (id),
  UNIQUE KEY uk_pallet_location_release_idempotency
    (tenant_id, source_service, business_id, idempotency_key),
  KEY idx_pallet_location_release_business (tenant_id, source_service, business_id, operation_status)
) ENGINE=InnoDB COMMENT='PDA已拣满库位精确释放的持久化幂等操作记录';