presto-hive/src/main/java/io/prestosql/plugin/hive/coercions/DecimalCoercers.java/LongDecimalToShortDecimalCoercer/applyCoercedValue
class LongDecimalToShortDecimalCoercer:        @Override
        protected void applyCoercedValue(BlockBuilder blockBuilder, Block block, int position)
        {
            long returnValue = longToShortCast(fromType.getSlice(block, position),
                    fromType.getPrecision(),
                    fromType.getScale(),
                    toType.getPrecision(),
                    toType.getScale());
            toType.writeLong(blockBuilder, returnValue);
        }