presto-orc/src/main/java/io/prestosql/orc/writer/DecimalColumnWriter.java/DecimalColumnWriter/reset
class DecimalColumnWriter:    @Override
    public void reset()
    {
        closed = false;
        dataStream.reset();
        scaleStream.reset();
        presentStream.reset();
        rowGroupColumnStatistics.clear();
        shortDecimalStatisticsBuilder = new ShortDecimalStatisticsBuilder(this.type.getScale());
        longDecimalStatisticsBuilder = new LongDecimalStatisticsBuilder();
    }