[jira] [Created] (FLINK-23919) PullUpWindowTableFunctionIntoWindowAggregateRule generates invalid Calc for Window TVF

["Yuval Itzchakov (Jira)" <ji...@apache.org>]

Yuval Itzchakov created FLINK-23919:
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             Summary: PullUpWindowTableFunctionIntoWindowAggregateRule generates invalid Calc for Window TVF
                 Key: FLINK-23919
                 URL: https://issues.apache.org/jira/browse/FLINK-23919
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.13.2
            Reporter: Yuval Itzchakov


Given the following Window TVF:
{code:java}
SELECT window_time, 
       MIN(alert_timestamp) as start_time, 
       MAX(alert_timestamp) as end_time 
FROM TABLE(TUMBLE(TABLE alert_table, DESCRIPTOR(alert_timestamp), INTERVAL '3' MINUTE)) 
WHERE service_source = 'source' GROUP BY window_start, window_end, window_time
{code}
Where the schema of alert_table is:
{code:java}
alert_timestamp: TIMESTAMP(3) ROWTIME INDICATOR
service_source: VARCHAR{code}
The following generates an invalid RowType:
{code:java}
Error while applying rule PullUpWindowTableFunctionIntoWindowAggregateRule, args [rel#358:StreamPhysicalWindowAggregate.STREAM_PHYSICAL.any.None: 0.[NONE].[NONE](input=RelSubset#356,window=TUMBLE(win_start=[window_start], win_end=[window_end], size=[3 min]),select=MIN(alert_timestamp) AS start_time, MAX(alert_timestamp) AS end_time, start('w$) AS window_start, end('w$) AS window_end, rowtime('w$) AS window_time), rel#367:StreamPhysicalExchange.STREAM_PHYSICAL.single.None: 0.[NONE].[NONE](input=RelSubset#355,distribution=single), rel#354:StreamPhysicalCalc.STREAM_PHYSICAL.any.None: 0.[NONE].[NONE](input=RelSubset#353,select=window_start, window_end, window_time, CAST(alert_timestamp) AS alert_timestamp,where==(service_source, _UTF-16LE'my source':VARCHAR(2147483647) CHARACTER SET "UTF-16LE")), rel#352:StreamPhysicalWindowTableFunction.STREAM_PHYSICAL.any.None: 0.[NONE].[NONE](input=RelSubset#351,window=TUMBLE(time_col=[alert_timestamp], size=[3 min]))]Error while applying rule PullUpWindowTableFunctionIntoWindowAggregateRule, args [rel#358:StreamPhysicalWindowAggregate.STREAM_PHYSICAL.any.None: 0.[NONE].[NONE](input=RelSubset#356,window=TUMBLE(win_start=[window_start], win_end=[window_end], size=[3 min]),select=MIN(alert_timestamp) AS start_time, MAX(alert_timestamp) AS end_time, start('w$) AS window_start, end('w$) AS window_end, rowtime('w$) AS window_time), rel#367:StreamPhysicalExchange.STREAM_PHYSICAL.single.None: 0.[NONE].[NONE](input=RelSubset#355,distribution=single), rel#354:StreamPhysicalCalc.STREAM_PHYSICAL.any.None: 0.[NONE].[NONE](input=RelSubset#353,select=window_start, window_end, window_time, CAST(alert_timestamp) AS alert_timestamp,where==(service_source, _UTF-16LE'Microsoft Defender for Identity':VARCHAR(2147483647) CHARACTER SET "UTF-16LE")), rel#352:StreamPhysicalWindowTableFunction.STREAM_PHYSICAL.any.None: 0.[NONE].[NONE](input=RelSubset#351,window=TUMBLE(time_col=[alert_timestamp], size=[3 min]))] at org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:256) at org.apache.calcite.plan.volcano.IterativeRuleDriver.drive(IterativeRuleDriver.java:58) at org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:510) at org.apache.calcite.tools.Programs$RuleSetProgram.run(Programs.java:312) at org.apache.flink.table.planner.plan.optimize.program.FlinkVolcanoProgram.optimize(FlinkVolcanoProgram.scala:69) at org.apache.flink.table.planner.plan.optimize.program.FlinkChainedProgram.$anonfun$optimize$1(FlinkChainedProgram.scala:62) at scala.collection.TraversableOnce$folder$1.apply(TraversableOnce.scala:196) at scala.collection.TraversableOnce$folder$1.apply(TraversableOnce.scala:194) at scala.collection.Iterator.foreach(Iterator.scala:943) at scala.collection.Iterator.foreach$(Iterator.scala:943) at scala.collection.AbstractIterator.foreach(Iterator.scala:1431) at scala.collection.IterableLike.foreach(IterableLike.scala:74) at scala.collection.IterableLike.foreach$(IterableLike.scala:73) at scala.collection.AbstractIterable.foreach(Iterable.scala:56) at scala.collection.TraversableOnce.foldLeft(TraversableOnce.scala:199) at scala.collection.TraversableOnce.foldLeft$(TraversableOnce.scala:192) at scala.collection.AbstractTraversable.foldLeft(Traversable.scala:108) at org.apache.flink.table.planner.plan.optimize.program.FlinkChainedProgram.optimize(FlinkChainedProgram.scala:58) at org.apache.flink.table.planner.plan.optimize.StreamCommonSubGraphBasedOptimizer.optimizeTree(StreamCommonSubGraphBasedOptimizer.scala:163) at org.apache.flink.table.planner.plan.optimize.StreamCommonSubGraphBasedOptimizer.doOptimize(StreamCommonSubGraphBasedOptimizer.scala:83) at org.apache.flink.table.planner.plan.optimize.CommonSubGraphBasedOptimizer.optimize(CommonSubGraphBasedOptimizer.scala:77) at org.apache.flink.table.planner.delegation.PlannerBase.optimize(PlannerBase.scala:279) at org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:163) at org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:1518) at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeInternal(TableEnvironmentImpl.java:740) at org.apache.flink.table.api.internal.StatementSetImpl.execute(StatementSetImpl.java:99) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834)Caused by: java.lang.RuntimeException: Error occurred while applying rule PullUpWindowTableFunctionIntoWindowAggregateRule at org.apache.calcite.plan.volcano.VolcanoRuleCall.transformTo(VolcanoRuleCall.java:161) at org.apache.calcite.plan.RelOptRuleCall.transformTo(RelOptRuleCall.java:268) at org.apache.calcite.plan.RelOptRuleCall.transformTo(RelOptRuleCall.java:283) at org.apache.flink.table.planner.plan.rules.physical.stream.PullUpWindowTableFunctionIntoWindowAggregateRule.onMatch(PullUpWindowTableFunctionIntoWindowAggregateRule.scala:143) at 
org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:229) ... 31 moreCaused by: org.apache.flink.table.api.ValidationException: Field names must be unique. Found duplicates: [alert_timestamp] at org.apache.flink.table.types.logical.RowType.validateFields(RowType.java:272) at org.apache.flink.table.types.logical.RowType.<init>(RowType.java:157) at org.apache.flink.table.types.logical.RowType.of(RowType.java:297) at org.apache.flink.table.types.logical.RowType.of(RowType.java:289) at org.apache.flink.table.planner.calcite.FlinkTypeFactory$.toLogicalRowType(FlinkTypeFactory.scala:657) at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamPhysicalWindowAggregate.aggInfoList$lzycompute(StreamPhysicalWindowAggregate.scala:60) at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamPhysicalWindowAggregate.aggInfoList(StreamPhysicalWindowAggregate.scala:59) at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamPhysicalWindowAggregate.explainTerms(StreamPhysicalWindowAggregate.scala:86) at org.apache.calcite.rel.AbstractRelNode.getDigestItems(AbstractRelNode.java:409) at org.apache.calcite.rel.AbstractRelNode.deepHashCode(AbstractRelNode.java:391) at org.apache.calcite.rel.AbstractRelNode$InnerRelDigest.hashCode(AbstractRelNode.java:443) at java.base/java.util.HashMap.hash(HashMap.java:339) at java.base/java.util.HashMap.get(HashMap.java:552) at org.apache.calcite.plan.volcano.VolcanoPlanner.registerImpl(VolcanoPlanner.java:1150) at org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:589) at org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:604) at org.apache.calcite.plan.volcano.VolcanoRuleCall.transformTo(VolcanoRuleCall.java:148)
{code}
Looking at the code, it seems that when PullUpWindowTableFunctionIntoWindowAggregateRule is building the new Calc in WindowUtil.buildNewProgramWithoutWindowColumns, it is adding the rowtime column from the input row to the new calc without checking to see if there are any name collisions. Also, TBH I'm not entirely sure yet why the rowtime column of the input table is being added to the projected output row like that?



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