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-- ============================================================
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-- 05: 品牌字段映射增加启用/禁用开关
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-- 执行目标库：cnc_business
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-- 幂等：是（通过 IF NOT EXISTS 检查列是否已存在）
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-- ============================================================
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-- 1. 增加 is_enabled 列（默认启用）
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SET @dbname = 'cnc_business';
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SET @tablename = 'cnc_brand_field_mapping';
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SET @columnname = 'is_enabled';
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SET @preparedStatement = (SELECT IF(
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(
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
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WHERE TABLE_SCHEMA = @dbname
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AND TABLE_NAME = @tablename
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AND COLUMN_NAME = @columnname
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) > 0,
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'SELECT 1',
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'ALTER TABLE cnc_brand_field_mapping ADD COLUMN is_enabled tinyint(1) NOT NULL DEFAULT 1 COMMENT ''是否启用：1=启用 0=禁用'' AFTER is_required'
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));
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PREPARE alterIfNotExists FROM @preparedStatement;
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EXECUTE alterIfNotExists;
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DEALLOCATE PREPARE alterIfNotExists;
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-- 2. 根据采集示例数据，禁用未出现的字段映射
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-- 采集示例中只出现了：_io_status, Tag5, Tag8, Tag9, Tag11, Tag22, Tag23
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-- 未出现的先设为禁用，后续可通过后台开关启用
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UPDATE cnc_brand_field_mapping SET is_enabled = 0
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WHERE field_name IN ('Tag14','Tag17','Tag18','Tag19','Tag20','Tag21','Tag24','Tag25','Tag26')
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AND is_enabled = 1;
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-- 3. 验证结果
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SELECT id, standard_field, field_name, is_required, is_enabled
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FROM cnc_brand_field_mapping
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ORDER BY id;
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