@Override
  public BigDecimal getPromotedValueFromProto(BigDecimalMsg r) {
    return Bytes.toBigDecimal(r.getBigdecimalMsg().toByteArray());
  }
ColumnInterpreter for doing Aggregation's with BigDecimal columns. This class is required at the
RegionServer also.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java