presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/cache/CachingHiveMetastore.java/CachingHiveMetastore/dropPartition
class CachingHiveMetastore:    @Override
    public void dropPartition(HiveIdentity identity, String databaseName, String tableName, List<String> parts, boolean deleteData)
    {
        identity = updateIdentity(identity);
        try {
            delegate.dropPartition(identity, databaseName, tableName, parts, deleteData);
        }
        finally {
            invalidatePartitionCache(databaseName, tableName);
        }
    }