imback82 commented on a change in pull request #34842:
URL: https://github.com/apache/spark/pull/34842#discussion_r766087819



##########
File path: 
sql/core/src/test/scala/org/apache/spark/sql/execution/command/AlterNamespaceSetPropertiesSuiteBase.scala
##########
@@ -0,0 +1,115 @@
+/*
+ * 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.execution.command
+
+import org.apache.spark.sql.{AnalysisException, QueryTest}
+import org.apache.spark.sql.catalyst.parser.ParseException
+import org.apache.spark.sql.connector.catalog.{CatalogV2Util, 
SupportsNamespaces}
+import org.apache.spark.sql.internal.SQLConf
+
+/**
+ * This base suite contains unified tests for the `ALTER NAMESPACE ... SET 
PROPERTIES` command that
+ * check V1 and V2 table catalogs. The tests that cannot run for all supported 
catalogs are located
+ * in more specific test suites:
+ *
+ *   - V2 table catalog tests:
+ *     
`org.apache.spark.sql.execution.command.v2.AlterNamespaceSetPropertiesSuite`
+ *   - V1 table catalog tests:
+ *     
`org.apache.spark.sql.execution.command.v1.AlterNamespaceSetPropertiesSuiteBase`
+ *     - V1 In-Memory catalog:
+ *       
`org.apache.spark.sql.execution.command.v1.AlterNamespaceSetPropertiesSuite`
+ *     - V1 Hive External catalog:
+ *        
`org.apache.spark.sql.hive.execution.command.AlterNamespaceSetPropertiesSuite`
+ */
+trait AlterNamespaceSetPropertiesSuiteBase extends QueryTest with 
DDLCommandTestUtils {
+  override val command = "ALTER NAMESPACE ... SET PROPERTIES"
+
+  protected def namespace: String
+
+  protected def notFoundMsgPrefix: String
+
+  test("Namespace does not exist") {
+    val ns = "not_exist"
+    val message = intercept[AnalysisException] {
+      sql(s"ALTER DATABASE $catalog.$ns SET PROPERTIES ('d'='d')")
+    }.getMessage
+    assert(message.contains(s"$notFoundMsgPrefix '$ns' not found"))
+  }
+
+  test("basic test") {
+    val ns = s"$catalog.$namespace"
+    withNamespace(ns) {
+      sql(s"CREATE NAMESPACE $ns")
+      assert(getProperties(ns) === "")
+      sql(s"ALTER NAMESPACE $ns SET PROPERTIES ('a'='a', 'b'='b', 'c'='c')")
+      assert(getProperties(ns) === "((a,a), (b,b), (c,c))")
+      sql(s"ALTER DATABASE $ns SET PROPERTIES ('d'='d')")
+      assert(getProperties(ns) === "((a,a), (b,b), (c,c), (d,d))")
+    }
+  }
+
+  test("test with properties set while creating namespace") {
+    val ns = s"$catalog.$namespace"
+    withNamespace(ns) {
+      sql(s"CREATE NAMESPACE $ns WITH PROPERTIES ('a'='a','b'='b','c'='c')")
+      assert(getProperties(ns) === "((a,a), (b,b), (c,c))")
+      sql(s"ALTER NAMESPACE $ns SET PROPERTIES ('a'='b', 'b'='a')")
+      assert(getProperties(ns) === "((a,b), (b,a), (c,c))")
+    }
+  }
+
+  test("test reserved properties") {
+    import SupportsNamespaces._
+    import org.apache.spark.sql.connector.catalog.CatalogV2Implicits._
+    val ns = s"$catalog.$namespace"
+    withSQLConf((SQLConf.LEGACY_PROPERTY_NON_RESERVED.key, "false")) {
+      CatalogV2Util.NAMESPACE_RESERVED_PROPERTIES.filterNot(_ == 
PROP_COMMENT).foreach { key =>
+        withNamespace(ns) {
+          sql(s"CREATE NAMESPACE $ns")
+          val exception = intercept[ParseException] {
+            sql(s"ALTER NAMESPACE $ns SET PROPERTIES ('$key'='dummyVal')")
+          }
+          assert(exception.getMessage.contains(s"$key is a reserved namespace 
property"))
+        }
+      }
+    }
+    withSQLConf((SQLConf.LEGACY_PROPERTY_NON_RESERVED.key, "true")) {
+      CatalogV2Util.NAMESPACE_RESERVED_PROPERTIES.filterNot(_ == 
PROP_COMMENT).foreach { key =>
+        withNamespace(ns) {
+          sql(s"CREATE NAMESPACE $ns")
+          assert(getProperties(ns) === "")
+          sql(s"ALTER NAMESPACE $ns SET PROPERTIES ('$key'='foo')")
+          assert(getProperties(ns) === "", s"$key is a reserved namespace 
property and ignored")
+          val meta = spark.sessionState.catalogManager.catalog(catalog)
+            .asNamespaceCatalog.loadNamespaceMetadata(namespace.split('.'))
+          assert(meta.get(key) == null || !meta.get(key).contains("foo"),

Review comment:
       For the owner, the difference comes because v2 command always adds the 
owner when the namespace is created:
   
https://github.com/apache/spark/blob/7b000116575cdc8e42653a694d9ad5273346fa61/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/CreateNamespaceExec.scala#L45-L47
   , whereas for v1 command doesn't add the owner when the database is created.
   
   Instead, for v1 Hive catalog, the user property is inserted when the 
database is retrieved:
   
https://github.com/apache/spark/blob/7b000116575cdc8e42653a694d9ad5273346fa61/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala#L370-L373
   
   Meanwhile, the v1 in-memory catalog implementation doesn't add the owner 
when the database is retrieved, so we see `null` owner above. (and the owner is 
a part of the property, so updating `V2SessionCatalog` doesn't really address 
the issue).
   
   One thing we can do is to update the v1 in-memory catalog to add the owner 
when the database is created or retrieved, but it is still not consistent since 
adding the owner is a responsibility of the command in v2, but a responsibility 
of the catalog in v1. Any thoughts?




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