CREATE TABLE `action_results` (
  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
  `table_id` bigint NOT NULL COMMENT '表ID',
  `version_ts` bigint NOT NULL COMMENT '版本时间戳（版本号）',
  `action_type` enum('ge_profiling','ge_result_desc','snippet','snippet_alias') COLLATE utf8mb4_bin NOT NULL COMMENT '动作类型',
  `status` enum('pending','running','success','failed','partial') COLLATE utf8mb4_bin NOT NULL DEFAULT 'pending' COMMENT '执行状态',
  `llm_usage` json DEFAULT NULL COMMENT 'LLM token usage统计',
  `error_code` varchar(128) COLLATE utf8mb4_bin DEFAULT NULL,
  `error_message` text COLLATE utf8mb4_bin,
  `started_at` datetime DEFAULT NULL,
  `finished_at` datetime DEFAULT NULL,
  `duration_ms` int DEFAULT NULL,
  `table_schema_version_id` varchar(19) COLLATE utf8mb4_bin NOT NULL,
  `table_schema` json NOT NULL,
  `ge_profiling_json` json DEFAULT NULL COMMENT 'Profiling完整结果JSON',
  `ge_profiling_json_size_bytes` bigint DEFAULT NULL,
  `ge_profiling_summary` json DEFAULT NULL COMMENT 'Profiling摘要（剔除大value_set等）',
  `ge_profiling_summary_size_bytes` bigint DEFAULT NULL,
  `ge_profiling_total_size_bytes` bigint DEFAULT NULL COMMENT '上两者合计',
  `ge_profiling_html_report_url` varchar(1024) COLLATE utf8mb4_bin DEFAULT NULL COMMENT 'GE报告HTML路径/URL',
  `ge_result_desc_json` json DEFAULT NULL COMMENT '表描述结果JSON',
  `ge_result_desc_json_size_bytes` bigint DEFAULT NULL,
  `snippet_json` json DEFAULT NULL COMMENT 'SQL知识片段结果JSON',
  `snippet_json_size_bytes` bigint DEFAULT NULL,
  `snippet_alias_json` json DEFAULT NULL COMMENT 'SQL片段改写/丰富结果JSON',
  `snippet_alias_json_size_bytes` bigint DEFAULT NULL,
  `callback_url` varchar(1024) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
  `result_checksum` varbinary(32) DEFAULT NULL COMMENT '对当前action有效载荷计算的MD5/xxhash',
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uq_table_ver_action` (`table_id`,`version_ts`,`action_type`),
  KEY `idx_status` (`status`),
  KEY `idx_table` (`table_id`,`updated_at`),
  KEY `idx_action_time` (`action_type`,`version_ts`),
  KEY `idx_schema_version` (`table_schema_version_id`)
) ENGINE=InnoDB AUTO_INCREMENT=53 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ROW_FORMAT=DYNAMIC COMMENT='数据分析知识片段表';