pkg database/sql/driver, type RowsColumnTypePrecisionScale interface { Close, ColumnTypePrecisionScale, Columns, Next }
pkg database/sql/driver, type RowsColumnTypePrecisionScale interface, Close() error
pkg database/sql/driver, type RowsColumnTypePrecisionScale interface, Columns() []string
pkg database/sql/driver, type RowsColumnTypePrecisionScale interface, ColumnTypePrecisionScale(int) (int64, int64, bool)

//
//	decimal(38, 4)    (38, 4, true)
//	int               (0, 0, false)
//	decimal           (math.MaxInt64, math.MaxInt64, true)
type RowsColumnTypePrecisionScale interface {
	Rows
	ColumnTypePrecisionScale(index int) (precision, scale int64, ok bool)
}

// Tx is a transaction.
type Tx interface {
	Commit() error
	Rollback() error
}