presto-rcfile/src/main/java/io/prestosql/rcfile/RcFileWriter.java/ColumnEncoder/reset
class ColumnEncoder:        public void reset()
        {
            checkArgument(columnClosed, "Column is open");
            lengthOutput.reset();

            output = output.createRecycledCompressedSliceOutput();
            encodeOutput = new ColumnEncodeOutput(lengthOutput, output);

            columnClosed = false;
        }