[GitHub] [spark] viirya commented on a diff in pull request #40308: [SPARK-42151][SQL] Align UPDATE assignments with table attributes

["viirya (via GitHub)" <gi...@apache.org>]

viirya commented on code in PR #40308:
URL: https://github.com/apache/spark/pull/40308#discussion_r1163426987


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/AlignRowLevelCommandAssignments.scala:
##########
@@ -0,0 +1,55 @@
+/*
+ * 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.catalyst.analysis
+
+import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, UpdateTable}
+import org.apache.spark.sql.catalyst.rules.Rule
+import org.apache.spark.sql.catalyst.util.CharVarcharUtils
+import org.apache.spark.sql.errors.QueryCompilationErrors
+import org.apache.spark.sql.execution.datasources.v2.DataSourceV2Relation
+import org.apache.spark.sql.internal.SQLConf.StoreAssignmentPolicy
+
+/**
+ * A rule that aligns assignments in row-level operations.
+ *
+ * Note that this rule must be run after resolving default values but before rewriting row-level
+ * commands into executable plans. This rule does not apply to tables that accept any schema.
+ * Such tables must inject their own rules to align assignments.
+ */
+object AlignRowLevelCommandAssignments extends Rule[LogicalPlan] {
+
+  override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
+    case u: UpdateTable if !u.skipSchemaResolution && u.resolved && !u.aligned =>

Review Comment:
   What happens if the table doesn't implement `SupportsRowLevelOperations`?



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