apache/seatunnel · error · UnsupportedOperationException

Unsupported type conversion from

Error message

Unsupported type conversion from %s to Hive ORC type

What it means

Default branch of seatunnelToHiveType's switch: any SeaTunnel SqlType without an explicit Hive (ORC) mapping hits this and throws UnsupportedOperationException formatted with the offending SqlType. It signals the Hive ORC writer cannot represent that type.

Solutions

1. Change the offending column to a supported type (primitives, STRING, struct, array, map).
2. Add a mapping case for the SqlType in HiveTypeConvertor.seatunnelToHiveType if the equivalent Hive type exists.
3. Use a transform to cast the field to a supported type before the Hive sink.

Example fix

// before
// switch has no case for SqlType.ROW_WITH_METADATA
// after
case ROW_WITH_METADATA:
    return seatunnelToHiveType(...); // or map to an existing supported type

static final Set<SqlType> HIVE_SUPPORTED = Set.of(
    SqlType.STRING, SqlType.BOOLEAN, SqlType.TINYINT, SqlType.SMALLINT,
    SqlType.INT, SqlType.BIGINT, SqlType.FLOAT, SqlType.DOUBLE,
    SqlType.DATE, SqlType.TIMESTAMP, SqlType.ROW, SqlType.ARRAY, SqlType.MAP);
if (!HIVE_SUPPORTED.contains(type.getSqlType())) {
    throw new IllegalArgumentException("Type not supported by Hive converter: " + type.getSqlType());
}

try {
    String hiveType = HiveTypeConvertor.seatunnelToHiveType(type);
} catch (UnsupportedOperationException e) {
    if (e.getMessage().startsWith("Unsupported type conversion")) {
        // log type.getSqlType() and cast/drop the field in a transform
    }
    throw e;
}

When it happens

Trigger: Calling seatunnelToHiveType with an unmapped SqlType (e.g. complex or newer types not covered by the switch cases) — the message's %s is filled with seaTunnelType.getSqlType().

Common situations: Introducing a column with a recently added SqlType into a Hive sink schema; upgrading SeaTunnel and using a new type before the Hive type converter gained a mapping.

Related errors

• Orc does not support NULL type
• COMMON-17
• ARRAY type requires element type
• COMMON-16
• COMMON-17

AI-assisted analysis of apache/seatunnel@cf67b549a7 (2026-09-10). Data as JSON: /api/errors/1e12d8f708c9e426. Report an issue: GitHub.

Appendix: source

Thrown at seatunnel-connectors-v2/connector-hive/src/main/java/org/apache/seatunnel/connectors/seatunnel/hive/utils/HiveTypeConvertor.java:156

                    org.apache.seatunnel.api.table.type.SeaTunnelDataType<?> keyType =
                            mapType.getKeyType();
                    org.apache.seatunnel.api.table.type.SeaTunnelDataType<?> valueType =
                            mapType.getValueType();
                    if (keyType == null || valueType == null) {
                        throw new UnsupportedOperationException(
                                "MAP type requires key and value types");
                    }
                    return "map<"
                            + seatunnelToHiveType(keyType)
                            + ","
                            + seatunnelToHiveType(valueType)
                            + ">";
                }
                throw new UnsupportedOperationException("MAP type requires key and value types");
            case NULL:
                throw new UnsupportedOperationException("Orc does not support NULL type");
            default:
                throw new UnsupportedOperationException(
                        String.format(
                                "Unsupported type conversion from %s to Hive ORC type",
                                seaTunnelType.getSqlType()));
        }
    }
}

View on GitHub (pinned to cf67b549a7)