Period periodYear = fieldReader.readPeriod();
intervalYearHolder.value = (periodYear.getYears() * org.apache.drill.exec.expr.fn.impl.DateUtility.yearsToMonths) + periodYear.getMonths();
mapWriter.intervalYear(MappifyUtility.fieldValue).write(intervalYearHolder);
break;
case FLOAT4:
Float4Holder float4Holder = new Float4Holder();
float4Holder.value = fieldReader.readFloat();
mapWriter.float4(MappifyUtility.fieldValue).write(float4Holder);
break;
case FLOAT8:
Float8Holder float8Holder = new Float8Holder();