prestodb/presto · error · PrestoException

NOT_SUPPORTED

NOT_SUPPORTED

Error message

No lexicoder for type 

What it means

LexicoderRowSerializer.getLexicoder resolves an Accumulo Lexicoder for a Presto Type from its LEXICODER_MAP; when a type has no registered lexicoder it throws NOT_SUPPORTED with 'No lexicoder for type <type>'. Called from encode/decode and list/map lexicoder resolution, so it blocks reading or writing that column.

Source

Thrown at presto-accumulo/src/main/java/com/facebook/presto/accumulo/serializers/LexicoderRowSerializer.java:396

    {
        return (T) getLexicoder(type).decode(value);
    }

    public static Lexicoder getLexicoder(Type type)
    {
        if (Types.isArrayType(type)) {
            return getListLexicoder(type);
        }
        else if (Types.isMapType(type)) {
            return getMapLexicoder(type);
        }
        else if (type instanceof VarcharType) {
            return LEXICODER_MAP.get(VARCHAR);
        }
        else {
            Lexicoder lexicoder = LEXICODER_MAP.get(type);
            if (lexicoder == null) {
                throw new PrestoException(NOT_SUPPORTED, "No lexicoder for type " + type);
            }
            return lexicoder;
        }
    }

    private static ListLexicoder getListLexicoder(Type elementType)
    {
        ListLexicoder<?> listLexicoder = LIST_LEXICODERS.get(elementType.getTypeSignature());
        if (listLexicoder == null) {
            listLexicoder = new ListLexicoder(getLexicoder(Types.getElementType(elementType)));
            LIST_LEXICODERS.put(elementType.getTypeSignature(), listLexicoder);
        }
        return listLexicoder;
    }

    private static MapLexicoder getMapLexicoder(Type type)
    {
        MapLexicoder<?, ?> mapLexicoder = MAP_LEXICODERS.get(type.getTypeSignature());

View on GitHub (pinned to 55bb57d202)

Solutions

1. Cast unsupported columns to supported types (BIGINT, DOUBLE, VARCHAR, VARBINARY) in the table schema
2. Register a lexicoder for the type in LEXICODER_MAP (e.g. a custom Lexicoder) if maintaining a fork
3. Use a different RowSerializer (e.g. ZookeeperRowSerializer or a custom one) for tables with exotic types
4. Upgrade to a newer connector version with a broader LEXICODER_MAP

Example fix

// before
private static final Map<Type, Lexicoder<?>> LEXICODER_MAP = ImmutableMap.<Type, Lexicoder<?>>builder()
    .put(BIGINT, new ULongLexicoder())...
    .build();
// after
private static final Map<Type, Lexicoder<?>> LEXICODER_MAP = ImmutableMap.<Type, Lexicoder<?>>builder()
    .put(BIGINT, new ULongLexicoder())
    .put(DATE, new DateLexicoder())
    .put(BOOLEAN, new BooleanLexicoder())...
    .build();

private static final Set<Type> LEXICODER_TYPES = ImmutableSet.of(BIGINT, DOUBLE, VARCHAR, VARBINARY, INTEGER, BOOLEAN);
if (!LEXICODER_TYPES.contains(type)) {
    throw new IllegalArgumentException("No lexicoder registered for " + type);
}

static boolean hasLexicoder(Type t) {
    return t != null && LEXICODER_MAP.containsKey(t) || t instanceof VarcharType || t instanceof BigintType;
}

try {
    byte[] bytes = serializer.encode(type, value);
} catch (PrestoException e) {
    if (e.getErrorCode().getCode() == StandardErrorCode.NOT_SUPPORTED.toErrorCode().getCode()) {
        // fall back to another serializer or fail the column
    }
    throw e;
}

When it happens

Trigger: Encoding/decoding a column whose Type is absent from LEXICODER_MAP (commonly BOOLEAN, DATE, TIME, TIMESTAMP, DECIMAL, JSON, or any complex type whose element types also resolve to nothing), or using the serializer for a table whose schema contains such types.

Common situations: Table created with serializer=lexicoder but schema includes types added in later Presto versions; nested array/map element types unsupported; choosing lexicoder serializer for a table that previously used another serializer.

Understand the failure class

Background: Presto NOT_SUPPORTED error: what "not supported" means and how to fix it — this error's family across 3 libraries.

Related errors

• INVALID_FUNCTION_ARGUMENT
• NOT_SUPPORTED
• UNEXPECTED_ACCUMULO_ERROR
• NOT_SUPPORTED
• UNEXPECTED_ACCUMULO_ERROR

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/82578c87ff61a18c. Report an issue: GitHub.