-- 策略参数扁平化（path → value），便于跨版本 diff 与敏感性扫描
-- 由 src/hdiv/data/schema.py 生成，请勿手工修改
CREATE TABLE IF NOT EXISTS `hd_strategy_param` (
  `id`            BIGINT       NOT NULL AUTO_INCREMENT,
  `strategy_id`   VARCHAR(32)  NOT NULL,
  `version`       VARCHAR(16)  NOT NULL,
  `param_path`    VARCHAR(255) NOT NULL,
  `param_value`   VARCHAR(500) NULL,
  `value_type`    VARCHAR(16)  NULL COMMENT 'int/float/str/bool/null',
  `created_at`    DATETIME     NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uq_hd_sparam` (`strategy_id`,`version`,`param_path`),
  KEY `ix_hd_sparam_path` (`param_path`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='策略参数扁平表';