@Override public List<Function> getAllFunctions(String catName) throws MetaException {
    // TODO functionCache
    return rawStore.getAllFunctions(catName);
  }
getPartitionSpecsByFilterAndProjection interface is currently non-cacheable.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/cache/CachedStore.java