xuefuz commented on a change in pull request #8222: [FLINK-11518] [table] Add 
partition related catalog APIs and implement them in GenericInMemoryCatalog
URL: https://github.com/apache/flink/pull/8222#discussion_r277804076
 
 

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 File path: 
flink-table/flink-table-common/src/main/java/org/apache/flink/table/catalog/CatalogPartition.java
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 @@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.table.catalog;
+
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * Represents a partition object in catalog.
+ */
+public interface CatalogPartition {
+
+       /**
+        * Get the PartitionSpec of the partition.
+        *
+        * @return the PartitionSpec of the partition.
+        */
+       PartitionSpec getPartitionSpec();
 
 Review comment:
   PartitionSpec is more like the name of a partition. Similar to the name of a 
table or function, which isn't included in the class definition, I think 
PartitionSpec should also stand out of Partition class for consistency. 
Partition class should care mostly about things other than naming, such as 
schema, stats, properties, etc.
   
   With this change, some of the added, partition-related APIs may subject to 
changes as well.

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