17 lines
646 B
SQL
17 lines
646 B
SQL
-- Run once against an existing planning MySQL/MariaDB database before deployment.
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SET @sku_fingerprint_exists = (
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SELECT COUNT(*)
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FROM information_schema.columns
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WHERE table_schema = DATABASE()
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AND table_name = 'alibaba_1688_products'
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AND column_name = 'sku_fingerprint'
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);
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SET @add_sku_fingerprint_sql = IF(
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@sku_fingerprint_exists = 0,
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'ALTER TABLE alibaba_1688_products ADD COLUMN sku_fingerprint CHAR(64) NULL COMMENT ''有序 SKU 规格指纹'' AFTER sku_count',
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'SELECT 1'
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);
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PREPARE add_sku_fingerprint_stmt FROM @add_sku_fingerprint_sql;
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EXECUTE add_sku_fingerprint_stmt;
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DEALLOCATE PREPARE add_sku_fingerprint_stmt;
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