-- ================================================================
-- 场地表字段修复脚本（保留数据版本）
-- 用途：为现有 martial_venue 表添加缺失的字段，不删除已有数据
-- 日期：2025-12-06
-- ================================================================

-- 检查并添加 max_capacity 字段
SET @col_exists = 0;
SELECT COUNT(*) INTO @col_exists
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = 'martial_venue'
  AND COLUMN_NAME = 'max_capacity';

SET @sql = IF(@col_exists = 0,
  'ALTER TABLE martial_venue ADD COLUMN max_capacity int(11) DEFAULT 100 COMMENT ''最大容纳人数'' AFTER venue_code',
  'SELECT ''max_capacity 字段已存在'' AS info'
);

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- 检查并添加 facilities 字段（如果也缺失）
SET @col_exists = 0;
SELECT COUNT(*) INTO @col_exists
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = 'martial_venue'
  AND COLUMN_NAME = 'facilities';

SET @sql = IF(@col_exists = 0,
  'ALTER TABLE martial_venue ADD COLUMN facilities varchar(500) DEFAULT NULL COMMENT ''场地设施'' AFTER description',
  'SELECT ''facilities 字段已存在'' AS info'
);

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- 检查并添加 status 字段（如果也缺失）
SET @col_exists = 0;
SELECT COUNT(*) INTO @col_exists
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = 'martial_venue'
  AND COLUMN_NAME = 'status';

SET @sql = IF(@col_exists = 0,
  'ALTER TABLE martial_venue ADD COLUMN status int(2) DEFAULT 1 COMMENT ''状态(0-禁用,1-启用)'' AFTER sort_order',
  'SELECT ''status 字段已存在'' AS info'
);

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- ================================================================
-- 验证表结构
-- ================================================================
SELECT '字段添加完成，正在验证...' AS info;

SELECT COLUMN_NAME, COLUMN_TYPE, COLUMN_DEFAULT, IS_NULLABLE, COLUMN_COMMENT
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = 'martial_venue'
ORDER BY ORDINAL_POSITION;

-- 检查 max_capacity 字段是否存在
SELECT
    CASE
        WHEN COUNT(*) > 0 THEN '✓ max_capacity 字段已成功添加'
        ELSE '✗ max_capacity 字段仍然缺失'
    END AS result
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
  AND TABLE_NAME = 'martial_venue'
  AND COLUMN_NAME = 'max_capacity';