@Override
    public List<SinkField> addSinkFieldsForSinkMultiple(List<SinkField> sinkFields) {
        if (CollectionUtils.isEmpty(sinkFields)) {
            sinkFields = new ArrayList<>();
        }
        sinkFields.add(0, new SinkField(0, "varbinary", MetaField.DATA_BYTES_CANAL.name(), "meta.data_canal",
                MetaField.DATA_BYTES_CANAL.name(), "varbinary", 0, MetaField.DATA_BYTES_CANAL.name(), null));
        return sinkFields;
    }
The Provider for creating Doris load nodes.
inlong-manager/manager-pojo/src/main/java/org/apache/inlong/manager/pojo/sort/node/provider/DorisProvider.java