14 строки
345 B
SQL
14 строки
345 B
SQL
DO $$
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DECLARE
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column_exist boolean := false;
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BEGIN
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SELECT count(*) != 0 INTO column_exist
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FROM information_schema.columns
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WHERE table_name = 'channelmembers'
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AND column_name = 'roles'
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AND NOT data_type = 'varchar(64)';
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IF column_exist THEN
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ALTER TABLE channelmembers ALTER COLUMN roles TYPE varchar(64);
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END IF;
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END $$;
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