private void emit(SourceRecord inRecord, RowData physicalRow, Collector<RowData> collector) {
        if (!hasMetadata) {
            collector.collect(physicalRow);
            return;
        }
        appendMetadataCollector.inputRecord = inRecord;
        appendMetadataCollector.outputCollector = collector;
        appendMetadataCollector.collect(physicalRow);
    }
Initialize the source metric data.
Must be called on flink cluster rather than flink client
Since the audit operator is not serializable
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/mysql/RowDataDebeziumDeserializeSchema.java