Fabian Hueske created FLINK-6930: ------------------------------------ Summary: Selecting window start / end on row-based Tumble/Slide window causes NPE Key: FLINK-6930 URL: https://issues.apache.org/jira/browse/FLINK-6930 Project: Flink Issue Type: Bug Components: Table API & SQL Affects Versions: 1.3.0, 1.4.0 Reporter: Fabian Hueske
Selecting the start and end properties of a row-based window causes a NullPointerException. The following program: {code} val windowedTable = table .window(Tumble over 2.rows on 'proctime as 'w) .groupBy('w, 'string) .select('string as 'n, 'int.count as 'cnt, 'w.start as 's, 'w.end as 'e) {code} causes {code} Caused by: java.lang.NullPointerException at org.apache.calcite.runtime.SqlFunctions.toLong(SqlFunctions.java:1556) at org.apache.calcite.runtime.SqlFunctions.toLong(SqlFunctions.java:1551) at DataStreamCalcRule$40.processElement(Unknown Source) at org.apache.flink.table.runtime.CRowProcessRunner.processElement(CRowProcessRunner.scala:67) at org.apache.flink.table.runtime.CRowProcessRunner.processElement(CRowProcessRunner.scala:35) at org.apache.flink.streaming.api.operators.ProcessOperator.processElement(ProcessOperator.java:66) at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:528) at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:503) at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:483) at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:890) at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:868) at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51) at org.apache.flink.table.runtime.aggregate.IncrementalAggregateWindowFunction.apply(IncrementalAggregateWindowFunction.scala:75) at org.apache.flink.table.runtime.aggregate.IncrementalAggregateWindowFunction.apply(IncrementalAggregateWindowFunction.scala:37) at org.apache.flink.streaming.runtime.operators.windowing.functions.InternalSingleValueWindowFunction.process(InternalSingleValueWindowFunction.java:46) at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.emitWindowContents(WindowOperator.java:599) at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.processElement(WindowOperator.java:456) at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:207) at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:69) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:265) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:702) at java.lang.Thread.run(Thread.java:745) {code} We should validate that the start and end window properties are not accessed if the window is defined on row-counts. -- This message was sent by Atlassian JIRA (v6.4.14#64029)