presto-spi/src/main/java/io/prestosql/spi/type/DecimalConversions.java/DecimalConversions/shortToLongCast
class DecimalConversions:    public static Slice shortToLongCast(
            long value,
            long sourcePrecision,
            long sourceScale,
            long resultPrecision,
            long resultScale)
    {
        return longToLongCast(unscaledDecimal(value), sourcePrecision, sourceScale, resultPrecision, resultScale);
    }