35 lines
1.7 KiB
SQL
35 lines
1.7 KiB
SQL
-- =============================================================================
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-- الگوی copy/paste برای اضافه کردن امن یک ستون
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-- =============================================================================
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-- 1) USE دیتابیس
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-- 2) @table_name و @column_name و @alter_sql را عوض کنید
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-- 3) @after_column اختیاری است — اگر خالی باشد بدون AFTER اضافه میشود
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-- =============================================================================
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SET @db = DATABASE();
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SET @table_name = 'products';
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SET @column_name = 'show_in_assets';
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SET @after_column = 'show';
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SET @column_def = 'TINYINT(1) NOT NULL DEFAULT 1 COMMENT ''نمایش در صفحه داراییها''';
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SET @sql = IF(
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(SELECT COUNT(*) FROM information_schema.TABLES
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WHERE TABLE_SCHEMA = @db AND TABLE_NAME = @table_name) = 0,
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CONCAT('SELECT ''skip: table '', @table_name, '' not found'' AS info'),
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IF(
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(SELECT COUNT(*) FROM information_schema.COLUMNS
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WHERE TABLE_SCHEMA = @db AND TABLE_NAME = @table_name AND COLUMN_NAME = @column_name) > 0,
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CONCAT('SELECT ''skip: column '', @column_name, '' exists'' AS info'),
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IF(
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@after_column IS NOT NULL AND @after_column <> ''
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AND (SELECT COUNT(*) FROM information_schema.COLUMNS
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WHERE TABLE_SCHEMA = @db AND TABLE_NAME = @table_name AND COLUMN_NAME = @after_column) > 0,
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CONCAT('ALTER TABLE `', @table_name, '` ADD COLUMN `', @column_name, '` ', @column_def, ' AFTER `', @after_column, '`'),
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CONCAT('ALTER TABLE `', @table_name, '` ADD COLUMN `', @column_name, '` ', @column_def)
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)
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)
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);
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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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