[GitHub] [spark] stczwd commented on a change in pull request #28617: [SPARK-31694][SQL] Add SupportsPartitions APIs on DataSourceV2

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stczwd commented on a change in pull request #28617:
URL: https://github.com/apache/spark/pull/28617#discussion_r463865869



##########
File path: sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/SupportsPartitions.java
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@@ -0,0 +1,96 @@
+/*
+ * 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.spark.sql.connector.catalog;
+
+import java.util.Map;
+
+import org.apache.spark.annotation.Experimental;
+import org.apache.spark.sql.catalyst.InternalRow;
+import org.apache.spark.sql.catalyst.analysis.NoSuchPartitionException;
+import org.apache.spark.sql.catalyst.analysis.PartitionAlreadyExistsException;
+
+/**
+ * A partition interface of {@link Table}.
+ * A partition is composed of identifier and properties,
+ * and properties contains metadata information of the partition.
+ * <p>
+ * These APIs are used to modify table partition identifier or partition metadata,
+ * in some cases, they will change actual value of table data as well.
+ *
+ * @since 3.0.0
+ */
+@Experimental
+public interface SupportsPartitions extends Table {
+
+    /**
+     * Create a partition in table.
+     *
+     * @param ident a new partition identifier
+     * @param properties the metadata of a partition
+     * @throws PartitionAlreadyExistsException If a partition already exists for the identifier
+     */
+    void createPartition(
+            InternalRow ident,
+            Map<String, String> properties) throws PartitionAlreadyExistsException;
+
+    /**
+     * Drop a partition from table.
+     *
+     * @param ident a partition identifier
+     * @return true if a partition was deleted, false if no partition exists for the identifier
+     */
+    Boolean dropPartition(InternalRow ident);
+
+    /**
+     * Rename a Partition from old identifier to new identifier with no metadata changed.
+     *
+     * @param oldIdent the partition identifier of the existing partition
+     * @param newIdent the new partition identifier of the partition
+     * @throws NoSuchPartitionException If the partition identifier to rename doesn't exist
+     * @throws PartitionAlreadyExistsException If the new partition identifier already exists
+     */
+    void renamePartition(
+            InternalRow oldIdent,
+            InternalRow newIdent) throws NoSuchPartitionException, PartitionAlreadyExistsException;

Review comment:
       Hm, that's sounds reasonable, thanks.




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