presto-main/src/main/java/io/prestosql/operator/scalar/VarbinaryFunctions.java/VarbinaryFunctions/rightPad
class VarbinaryFunctions:    @Description("pads a varbinary on the right")
    @ScalarFunction("rpad")
    @SqlType(StandardTypes.VARBINARY)
    public static Slice rightPad(@SqlType("varbinary") Slice inputSlice, @SqlType(StandardTypes.BIGINT) long targetLength, @SqlType("varbinary") Slice padBytes)
    {
        return pad(inputSlice, targetLength, padBytes, inputSlice.length());
    }