prestodb/presto · error · PrestoException

INVALID_CAST_ARGUMENT

INVALID_CAST_ARGUMENT

Error message

Cannot cast value to IPPREFIX: 

What it means

Cast error in castFromVarcharToIpPrefix: the input text is not a valid IPPREFIX literal — either it lacks the required '/' subnet suffix, or the address/subnet portion failed parsing. The original string is appended; the faulty input is the varchar being cast to IPPREFIX.

Source

Thrown at presto-main-base/src/main/java/com/facebook/presto/type/IpPrefixOperators.java:140

    }

    @ScalarOperator(XX_HASH_64)
    @SqlType(StandardTypes.BIGINT)
    public static long xxHash64(@SqlType(StandardTypes.IPPREFIX) Slice value)
    {
        return XxHash64.hash(value);
    }

    @LiteralParameters("x")
    @ScalarOperator(CAST)
    @SqlType(StandardTypes.IPPREFIX)
    public static Slice castFromVarcharToIpPrefix(@SqlType("varchar(x)") Slice slice)
    {
        byte[] address;
        int subnetSize;
        String string = slice.toStringUtf8();
        if (!string.contains("/")) {
            throw new PrestoException(INVALID_CAST_ARGUMENT, "Cannot cast value to IPPREFIX: " + slice.toStringUtf8());
        }
        String[] parts = string.split("/");
        try {
            address = InetAddresses.forString(parts[0]).getAddress();
        }
        catch (IllegalArgumentException e) {
            throw new PrestoException(INVALID_CAST_ARGUMENT, "Cannot cast value to IPPREFIX: " + slice.toStringUtf8());
        }
        subnetSize = Integer.parseInt(parts[1]);

        byte[] bytes = new byte[IPPREFIX.getFixedSize()];
        if (address.length == 4) {
            if (subnetSize < 0 || 32 < subnetSize) {
                throw new PrestoException(INVALID_CAST_ARGUMENT, "Cannot cast value to IPPREFIX: " + slice.toStringUtf8());
            }

            for (int i = 0; i < 4; i++) {
                address[3 - i] &= -0x1 << min(max((32 - subnetSize) - 8 * i, 0), 8);

View on GitHub (pinned to 55bb57d202)

Solutions

1. Use CIDR notation like '10.0.0.0/8' or '2001:db8::/32'
2. Ensure the subnet prefix length is within range for the address family
3. Validate the string format before casting

When it happens

Trigger: Thrown at presto-main-base/src/main/java/com/facebook/presto/type/IpPrefixOperators.java:140 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/cb41040e5a0502c3. Report an issue: GitHub.