presto-hive/src/main/java/io/prestosql/plugin/hive/util/HiveWriteUtils.java/HiveWriteUtils/DecimalFieldSetter
class HiveWriteUtils:        public DecimalFieldSetter(SettableStructObjectInspector rowInspector, Object row, StructField field, DecimalType decimalType)
        {
            super(rowInspector, row, field);
            this.decimalType = decimalType;
        }