Error Codes

In addition to providing named error strings, Presto maps error codes onto integers for use with APIs like JDBC's SQLException that require an integer.

Each connector is allocated its own 16-bit range of error codes, indicated in the table below. New allocations may be reserved by adding them to the table.

Additionally, the range 0x7F00 to 0x7FF is reserved for private connectors. This is useful for connectors that are private to an organization (and thus will not conflict with other private connectors in other organizations).

Connector	Error Code Range
Hive	0x0100
Decoder	0x0101
Kafka	0x0102
Accumulo	0x0103
Raptor	0x0300
Base JDBC	0x0400
Atop	0x0500
Local File	0x0501

The following code shows the recommended way for a connector to implement error codes. In this example, the connector is allocated range 0x1234:

public enum ExampleErrorCode
        implements ErrorCodeSupplier
{
    EXAMPLE_ERROR(0),
    ANOTHER_EXAMPLE_ERROR(1);

    private final ErrorCode errorCode;

    ExampleErrorCode(int code)
    {
        errorCode = new ErrorCode(code + 0x1234_0000, name());
    }

    @Override
    public ErrorCode toErrorCode()
    {
        return errorCode;
    }
}