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err=global.GVA_DB.Raw("SELECT COLUMN_NAME column_name,DATA_TYPE data_type,CASE DATA_TYPE WHEN 'longtext' THEN c.CHARACTER_MAXIMUM_LENGTH WHEN 'varchar' THEN c.CHARACTER_MAXIMUM_LENGTH WHEN 'double' THEN CONCAT_WS( ',', c.NUMERIC_PRECISION, c.NUMERIC_SCALE ) WHEN 'decimal' THEN CONCAT_WS( ',', c.NUMERIC_PRECISION, c.NUMERIC_SCALE ) WHEN 'int' THEN c.NUMERIC_PRECISION WHEN 'bigint' THEN c.NUMERIC_PRECISION ELSE '' END AS data_type_long,COLUMN_COMMENT colume_comment FROM INFORMATION_SCHEMA.COLUMNS c WHERE table_name = ? AND table_schema = ?", tableName, dbName).Scan(&Columns).Error
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err=global.GVA_DB.Raw("SELECT COLUMN_NAME column_name,DATA_TYPE data_type,CASE DATA_TYPE WHEN 'longtext' THEN c.CHARACTER_MAXIMUM_LENGTH WHEN 'varchar' THEN c.CHARACTER_MAXIMUM_LENGTH WHEN 'double' THEN CONCAT_WS( ',', c.NUMERIC_PRECISION, c.NUMERIC_SCALE ) WHEN 'decimal' THEN CONCAT_WS( ',', c.NUMERIC_PRECISION, c.NUMERIC_SCALE ) WHEN 'int' THEN c.NUMERIC_PRECISION WHEN 'bigint' THEN c.NUMERIC_PRECISION ELSE '' END AS data_type_long,COLUMN_COMMENT column_comment FROM INFORMATION_SCHEMA.COLUMNS c WHERE table_name = ? AND table_schema = ?", tableName, dbName).Scan(&Columns).Error
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