@Override
  public void cleanUp() {
    if (lookupOptions.isTTLAfterWriteValidated()) {
      setState.guavaCache.cleanUp();
    }
  }
Use secondary index to lookup. Working for the situation where the join keys don't match the
mixed-format table's primary keys.

<p>Example: <code>
SELECT * FROM t1 JOIN t2 for system_time as of t1.pt as dim ON t1.user_name = dim.user_name
</code>

<p>t2 as an mixed-format table with primary keys: user_name, city_name.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/lookup/SecondaryIndexTable.java