prestodb/presto · error

NOT_SUPPORTED

NOT_SUPPORTED

Error message

Unsupported type 

What it means

getLong was called for a column whose type is not in the long-coercible set handled by this cursor (BIGINT, INTEGER, DATE, TIME, TIMESTAMP, etc.). The connector schema and the Accumulo column types disagree, so the value cannot be produced as a long.

Source

Thrown at presto-accumulo/src/main/java/com/facebook/presto/accumulo/io/AccumuloRecordCursor.java:237

            return serializer.getInt(fieldToColumnName[field]);
        }
        else if (type.equals(REAL)) {
            return Float.floatToIntBits(serializer.getFloat(fieldToColumnName[field]));
        }
        else if (type.equals(SMALLINT)) {
            return serializer.getShort(fieldToColumnName[field]);
        }
        else if (type.equals(TIME)) {
            return serializer.getTime(fieldToColumnName[field]).getTime();
        }
        else if (type.equals(TIMESTAMP)) {
            return serializer.getTimestamp(fieldToColumnName[field]).getTime();
        }
        else if (type.equals(TINYINT)) {
            return serializer.getByte(fieldToColumnName[field]);
        }
        else {
            throw new PrestoException(NOT_SUPPORTED, "Unsupported type " + getType(field));
        }
    }

    @Override
    public Object getObject(int field)
    {
        Type type = getType(field);
        checkArgument(Types.isArrayType(type) || Types.isMapType(type), "Expected field %s to be a type of array or map but is %s", field, type);

        if (Types.isArrayType(type)) {
            return serializer.getArray(fieldToColumnName[field], type);
        }

        return serializer.getMap(fieldToColumnName[field], type);
    }

    @Override
    public Slice getSlice(int field)

View on GitHub (pinned to 55bb57d202)

Solutions

1. Check the column type in the Presto schema and read the column with the matching getter (getDouble/getSlice/etc.)
2. Cast the column in SQL to a long-compatible type
3. Fix the column encoder configured at ingest so the type matches

When it happens

Trigger: Thrown at presto-accumulo/src/main/java/com/facebook/presto/accumulo/io/AccumuloRecordCursor.java:237 when the library encounters an invalid state.

Common situations: See trigger scenarios.

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.

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/ae67bd1c0b5d7ee8. Report an issue: GitHub.