MartijnVisser commented on code in PR #29614:
URL: https://github.com/apache/flink/pull/29614#discussion_r4427585657


##########
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/logical/FlinkProjectSetOpTransposeRule.java:
##########
@@ -0,0 +1,51 @@
+/*
+ * 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.planner.plan.rules.logical;
+
+import org.apache.calcite.plan.RelOptRule;
+import org.apache.calcite.rel.logical.LogicalProject;
+import org.apache.calcite.rel.logical.LogicalUnion;
+import org.apache.calcite.rel.rules.ProjectSetOpTransposeRule;
+
+/**
+ * Extends calcite's ProjectSetOpTransposeRule, modification: only matches 
{@link LogicalUnion}.

Review Comment:
   Could you link the CALCITE ticket here once it's filed? Then we know this 
can go after a Calcite upgrade.



##########
flink-table/flink-table-planner/src/test/resources/org/apache/flink/table/planner/plan/common/PartialInsertTest.xml:
##########
@@ -127,17 +127,17 @@ 
LogicalSink(table=[default_catalog.default_database.partitioned_sink], targetCol
     <Resource name="optimized rel plan">
       <![CDATA[
 Sink(table=[default_catalog.default_database.partitioned_sink], 
targetColumns=[[4],[0],[6],[5],[2],[3]], fields=[a, c, d, e, f, g])
-+- Calc(select=[a0 AS a, c0 AS c, d0 AS d, e0 AS e, f0 AS f, g0 AS g])
-   +- Correlate(invocation=[$REPLICATE_ROWS$1($0, $1, $2, $3, $4, $5, $6)], 
correlate=[table($REPLICATE_ROWS$1(sum_vcol_marker,a,c,d,e,f,g))], 
select=[sum_vcol_marker,a,c,d,e,f,g,a0,c0,d0,e0,f0,g0], 
rowType=[RecordType(BIGINT sum_vcol_marker, INTEGER a, VARCHAR(2147483647) c, 
VARCHAR(2147483647) d, DOUBLE e, BIGINT f, INTEGER g, INTEGER a0, 
VARCHAR(2147483647) c0, VARCHAR(2147483647) d0, DOUBLE e0, BIGINT f0, INTEGER 
g0)], joinType=[INNER])
-      +- Calc(select=[sum_vcol_marker, a, c, d, e, f, g], 
where=[>(sum_vcol_marker, 0)])
-         +- GroupAggregate(groupBy=[a, c, d, e, f, g], select=[a, c, d, e, f, 
g, SUM_RETRACT(vcol_marker) AS sum_vcol_marker])
-            +- Exchange(distribution=[hash[a, c, d, e, f, g]])
-               +- Union(all=[true], union=[a, c, d, e, f, g, vcol_marker])
-                  :- Calc(select=[a, c, d, e, CAST(123 AS BIGINT) AS f, 
CAST(456 AS INTEGER) AS g, 1 AS vcol_marker])
++- Calc(select=[a0 AS a, c0 AS c, d0 AS d, e0 AS e, CAST(123 AS BIGINT) AS f, 
CAST(456 AS INTEGER) AS g])
+   +- Correlate(invocation=[$REPLICATE_ROWS$1($0, $1, $2, $3, $4, $5, $6)], 
correlate=[table($REPLICATE_ROWS$1(sum_vcol_marker,a,c,d,e,EXPR$4,EXPR$5))], 
select=[sum_vcol_marker,a,c,d,e,EXPR$4,EXPR$5,a0,c0,d0,e0,EXPR$40,EXPR$50], 
rowType=[RecordType(BIGINT sum_vcol_marker, INTEGER a, VARCHAR(2147483647) c, 
VARCHAR(2147483647) d, DOUBLE e, INTEGER EXPR$4, INTEGER EXPR$5, INTEGER a0, 
VARCHAR(2147483647) c0, VARCHAR(2147483647) d0, DOUBLE e0, INTEGER EXPR$40, 
INTEGER EXPR$50)], joinType=[INNER])
+      +- Calc(select=[sum_vcol_marker, a, c, d, e, EXPR$4, EXPR$5], 
where=[>(sum_vcol_marker, 0)])
+         +- GroupAggregate(groupBy=[a, c, d, e, EXPR$4, EXPR$5], select=[a, c, 
d, e, EXPR$4, EXPR$5, SUM_RETRACT(vcol_marker) AS sum_vcol_marker])
+            +- Exchange(distribution=[hash[a, c, d, e, EXPR$4, EXPR$5]])
+               +- Union(all=[true], union=[a, c, d, e, EXPR$4, EXPR$5, 
vcol_marker])
+                  :- Calc(select=[a, c, d, e, 123 AS EXPR$4, 456 AS EXPR$5, 1 
AS vcol_marker])
                   :  +- GroupAggregate(groupBy=[a, b, c, d, e], select=[a, b, 
c, d, e])
                   :     +- Exchange(distribution=[hash[a, b, c, d, e]])
                   :        +- TableSourceScan(table=[[default_catalog, 
default_database, MyTable]], fields=[a, b, c, d, e])
-                  +- Calc(select=[a, c, d, e, CAST(123 AS BIGINT) AS f, 
CAST(456 AS INTEGER) AS g, -1 AS vcol_marker])
+                  +- Calc(select=[a, c, d, e, 456 AS EXPR$4, 789 AS EXPR$5, -1 
AS vcol_marker])

Review Comment:
   Not just a plan change: the old plan gave the right input 123/456 instead of 
456/789, so these inserts wrote wrong rows. I think the description should say 
the results change too.



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