presto-jdbc/src/main/java/io/prestosql/jdbc/PrestoResultSet.java/PrestoResultSet/getBigDecimal
class PrestoResultSet:    @Override
    public BigDecimal getBigDecimal(int columnIndex, int scale)
            throws SQLException
    {
        BigDecimal bigDecimal = getBigDecimal(columnIndex);
        if (bigDecimal != null) {
            bigDecimal = bigDecimal.setScale(scale, ROUND_HALF_UP);
        }
        return bigDecimal;
    }