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migrations/000072_add_device_imei_sn_fields.down.sql
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migrations/000072_add_device_imei_sn_fields.down.sql
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-- 回滚设备标识符模型重构
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-- 删除索引
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DROP INDEX IF EXISTS idx_device_imei;
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DROP INDEX IF EXISTS idx_device_sn;
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-- 删除字段
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ALTER TABLE tb_device DROP COLUMN IF EXISTS imei;
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ALTER TABLE tb_device DROP COLUMN IF EXISTS sn;
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-- 恢复 device_no 注释
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COMMENT ON COLUMN tb_device.device_no IS '设备编号(唯一标识)';
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