Timo Walther created FLINK-7698:
-----------------------------------
Summary: Join with null literals leads to NPE
Key: FLINK-7698
URL: https://issues.apache.org/jira/browse/FLINK-7698
Project: Flink
Issue Type: Bug
Components: Table API & SQL
Reporter: Timo Walther
The following query fails:
{code}
@Test
def testProcessTimeInnerJoin(): Unit = {
val env = StreamExecutionEnvironment.getExecutionEnvironment
val tEnv = TableEnvironment.getTableEnvironment(env)
env.setStateBackend(getStateBackend)
StreamITCase.clear
env.setParallelism(1)
val sqlQuery = "SELECT t2.a, t2.c, t1.c from T1 as t1 join T2 as t2 on t1.a
= t2.a and t1.nullField = t2.nullField and " +
"t1.proctime between t2.proctime - interval '5' second and t2.proctime +
interval '5' second"
val data1 = new mutable.MutableList[(Int, Long, String)]
data1.+=((1, 1L, "Hi1"))
data1.+=((1, 2L, "Hi2"))
data1.+=((1, 5L, "Hi3"))
data1.+=((2, 7L, "Hi5"))
data1.+=((1, 9L, "Hi6"))
data1.+=((1, 8L, "Hi8"))
data1.+=((1, 8L, "Hi8"))
val data2 = new mutable.MutableList[(Int, Long, String)]
data2.+=((1, 1L, "HiHi"))
data2.+=((2, 2L, "HeHe"))
val t1 = env.fromCollection(data1).toTable(tEnv, 'a, 'b, 'c,
'proctime.proctime)
.select('a, 'b, 'c, 'proctime, Null(Types.LONG) as 'nullField)
val t2 = env.fromCollection(data2).toTable(tEnv, 'a, 'b, 'c,
'proctime.proctime)
.select('a, 'b, 'c, 'proctime, 12L as 'nullField)
tEnv.registerTable("T1", t1)
tEnv.registerTable("T2", t2)
val result = tEnv.sqlQuery(sqlQuery).toAppendStream[Row]
result.addSink(new StreamITCase.StringSink[Row])
env.execute()
}
{code}
It leads to:
{code}
java.lang.NullPointerException
at org.apache.calcite.rex.RexUtil.gatherConstraint(RexUtil.java:437)
at org.apache.calcite.rex.RexUtil.gatherConstraints(RexUtil.java:399)
at org.apache.calcite.rex.RexUtil.predicateConstants(RexUtil.java:336)
at
org.apache.calcite.plan.RelOptPredicateList.of(RelOptPredicateList.java:144)
at
org.apache.calcite.rel.metadata.RelMdPredicates$JoinConditionBasedPredicateInference.inferPredicates(RelMdPredicates.java:654)
at
org.apache.calcite.rel.metadata.RelMdPredicates.getPredicates(RelMdPredicates.java:326)
at GeneratedMetadataHandler_Predicates.getPredicates_$(Unknown Source)
at GeneratedMetadataHandler_Predicates.getPredicates(Unknown Source)
at GeneratedMetadataHandler_Predicates.getPredicates_$(Unknown Source)
at GeneratedMetadataHandler_Predicates.getPredicates(Unknown Source)
at
org.apache.calcite.rel.metadata.RelMetadataQuery.getPulledUpPredicates(RelMetadataQuery.java:803)
at
org.apache.calcite.rel.rules.ReduceExpressionsRule$ProjectReduceExpressionsRule.onMatch(ReduceExpressionsRule.java:264)
at
org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:317)
at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:506)
at
org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:385)
at
org.apache.calcite.plan.hep.HepPlanner.executeInstruction(HepPlanner.java:251)
at
org.apache.calcite.plan.hep.HepInstruction$RuleInstance.execute(HepInstruction.java:125)
at
org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:210)
at
org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:197)
at
org.apache.flink.table.api.TableEnvironment.runHepPlanner(TableEnvironment.scala:257)
at
org.apache.flink.table.api.StreamTableEnvironment.optimize(StreamTableEnvironment.scala:663)
at
org.apache.flink.table.api.StreamTableEnvironment.translate(StreamTableEnvironment.scala:728)
at
org.apache.flink.table.api.scala.StreamTableEnvironment.toAppendStream(StreamTableEnvironment.scala:219)
at
org.apache.flink.table.api.scala.StreamTableEnvironment.toAppendStream(StreamTableEnvironment.scala:195)
at
org.apache.flink.table.api.scala.TableConversions.toAppendStream(TableConversions.scala:121)
at
org.apache.flink.table.runtime.stream.sql.JoinITCase.testProcessTimeInnerJoin(JoinITCase.scala:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at
com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at
com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at
com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
{code}
Seems to be a Calcite bug, but we have to investigate this first. Replacing
{{Null(Types.LONG)}} with a value works.
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