matvei-zamiatin-db commented on code in PR #58119:
URL: https://github.com/apache/spark/pull/58119#discussion_r3862542059
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/RewriteWithExpression.scala:
##########
@@ -66,6 +66,23 @@ object RewriteWithExpression extends Rule[LogicalPlan] {
}
}
+ /**
+ * Rewrites the `With` expressions in a single expression tree by inlining
their common
+ * expressions. Uses `transformUp` to handle nested `With`.
+ *
+ * Does not descend into subquery plans (e.g. `ScalarSubquery`). A caller
whose expression
+ * may contain a subquery must rewrite those plans separately.
+ */
+ def applyForExpression(expression: Expression): Expression = {
+ expression.transformUpWithPruning(_.containsPattern(WITH_EXPRESSION)) {
+ case With(child, defs) =>
+ val refToExpr = defs.map(commonExprDef => commonExprDef.id ->
commonExprDef.child).toMap
+ child.transformWithPruning(_.containsPattern(COMMON_EXPR_REF)) {
+ case ref: CommonExpressionRef if refToExpr.contains(ref.id) =>
refToExpr(ref.id)
+ }
+ }
+ }
Review Comment:
Fixed
##########
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ReplaceExpressionsSuite.scala:
##########
@@ -0,0 +1,46 @@
+/*
+ * 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.optimizer
+
+import org.apache.spark.sql.catalyst.expressions.{Add, Coalesce, Literal, Nvl,
RuntimeReplaceable}
+import org.apache.spark.sql.catalyst.plans.PlanTest
+
+class ReplaceExpressionsSuite extends PlanTest {
Review Comment:
Fixed
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