55 lines
2.2 KiB
SQL
55 lines
2.2 KiB
SQL
-- 先检查 `email` 列是否存在，再删除
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SELECT COUNT(*) INTO @col_exists FROM information_schema.columns
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WHERE table_schema = DATABASE() AND table_name = 'user' AND column_name = 'email';
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SET @sql = IF(@col_exists > 0, 'ALTER TABLE `user` DROP COLUMN `email`', 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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-- 先检查 `telephone` 列是否存在，再删除
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SELECT COUNT(*) INTO @col_exists FROM information_schema.columns
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WHERE table_schema = DATABASE() AND table_name = 'user' AND column_name = 'telephone';
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SET @sql = IF(@col_exists > 0, 'ALTER TABLE `user` DROP COLUMN `telephone`', 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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-- 先检查 `telephone_area_code` 列是否存在，再删除
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SELECT COUNT(*) INTO @col_exists FROM information_schema.columns
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WHERE table_schema = DATABASE() AND table_name = 'user' AND column_name = 'telephone_area_code';
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SET @sql = IF(@col_exists > 0, 'ALTER TABLE `user` DROP COLUMN `telephone_area_code`', 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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-- 先检查 `idx_email` 索引是否存在，再删除
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SELECT COUNT(*) INTO @idx_exists FROM information_schema.statistics
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WHERE table_schema = DATABASE() AND table_name = 'user' AND index_name = 'idx_email';
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SET @sql = IF(@idx_exists > 0, 'ALTER TABLE `user` DROP INDEX `idx_email`', 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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-- 先检查 `idx_telephone` 索引是否存在，再删除
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SELECT COUNT(*) INTO @idx_exists FROM information_schema.statistics
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WHERE table_schema = DATABASE() AND table_name = 'user' AND index_name = 'idx_telephone';
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SET @sql = IF(@idx_exists > 0, 'ALTER TABLE `user` DROP INDEX `idx_telephone`', 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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-- 先检查 `idx_telephone_area_code` 索引是否存在，再删除
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SELECT COUNT(*) INTO @idx_exists FROM information_schema.statistics
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WHERE table_schema = DATABASE() AND table_name = 'user' AND index_name = 'idx_telephone_area_code';
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SET @sql = IF(@idx_exists > 0, 'ALTER TABLE `user` DROP INDEX `idx_telephone_area_code`', 'SELECT 1');
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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