private static String getMetaData(SourceRecord record, String tableNameKey) {
        Struct messageStruct = (Struct) record.value();
        Struct sourceStruct = messageStruct.getStruct(FieldName.SOURCE);
        return sourceStruct.getString(tableNameKey);
    }
get meta info from debezium-json data stream

@param record source record
@param tableNameKey key in the source record
@return value of the key in the source record
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/postgres-cdc/src/main/java/org/apache/inlong/sort/cdc/postgres/table/PostgreSQLReadableMetaData.java