@Override
    public String getMetadataKey(MetaField metaField) {
        String metadataKey;
        switch (metaField) {
            case AUDIT_DATA_TIME:
                metadataKey = "audit_data_time";
                break;
            default:
                throw new UnsupportedOperationException(String.format("Unsupport meta field for %s: %s",
                        this.getClass().getSimpleName(), metaField));
        }
        return metadataKey;
    }
Iceberg extract node for extract data from iceberg
inlong-sort/sort-common/src/main/java/org/apache/inlong/sort/protocol/node/extract/IcebergExtractNode.java