private String generateRocksDBPath(FunctionContext context, String tableName) {
    String tmpPath = getTmpDirectoryFromTMContainer(context);
    File db = new File(tmpPath, tableName + "-lookup-" + UUID.randomUUID());
    return db.toString();
  }
Check whether it is time to periodically load data to kvTable. Support to use {@link
Expression} filters to filter the data.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/lookup/BasicLookupFunction.java