[FLINK-11381] JOIN LATERAL with a table was not support

• Type: Improvement
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.7.0
• Component/s: Table SQL / API
• Labels: auto-deprioritized-critical auto-deprioritized-major auto-deprioritized-minor auto-unassigned

Environment

Flink 1.7.0 

• Assignee: Unassigned
• Reporter: Hongtao Zhang
• Created: 17/Jan/19 10:20
• Updated: 05/Feb/22 10:36

Description

INNER/LEFT LATERAL with a table (not table function) was not support by flink 

 

the sql query was tested on postgres 9.5 and passed but failed on Flink

 
val sqlQuery =
"""

SELECT

SUM(o.amount * r1.rate)

FROM Orders as o INNER JOIN LATERAL (

SELECT rowtime, rate

FROM RatesHistory as r

WHERE r.currency = o.currency

AND rowtime <= o.rowtime

ORDER BY rowtime DESC

LIMIT 1

) as r1 ON TRUE """.stripMargin   and the Error below   org.apache.flink.table.api.TableException: Cannot generate a valid execution plan for the given query:

FlinkLogicalAggregate(group=[{}], EXPR$0=[SUM($0)])
FlinkLogicalCalc(expr#0..5=[\{inputs}], expr#6=[*($t1, $t3)], $f0=[$t6])
FlinkLogicalJoin(condition=[AND(=($0, $4), =($2, $5))], joinType=[inner])
FlinkLogicalNativeTableScan(table=[[_DataStreamTable_0]])
FlinkLogicalCalc(expr#0..4=[\{inputs}], rate=[$t2], rowtime0=[$t3], currency0=[$t4])
FlinkLogicalSort(sort0=[$0], dir0=[DESC], fetch=[1])
FlinkLogicalJoin(condition=[AND(=($1, $4), <=($0, $3))], joinType=[inner])
FlinkLogicalNativeTableScan(table=[[_DataStreamTable_1]])
FlinkLogicalAggregate(group=[\{0, 1}])
FlinkLogicalCalc(expr#0..2=[\{inputs}], rowtime=[$t0], currency=[$t2])
FlinkLogicalNativeTableScan(table=[[_DataStreamTable_0]])

This exception indicates that the query uses an unsupported SQL feature.
Please check the documentation for the set of currently supported SQL features.
 

at org.apache.flink.table.api.TableEnvironment.runVolcanoPlanner(TableEnvironment.scala:377)
at org.apache.flink.table.api.TableEnvironment.optimizePhysicalPlan(TableEnvironment.scala:302)
at org.apache.flink.table.api.StreamTableEnvironment.optimize(StreamTableEnvironment.scala:832)
at org.apache.flink.table.api.StreamTableEnvironment.translate(StreamTableEnvironment.scala:881)
at org.apache.flink.table.api.scala.StreamTableEnvironment.toAppendStream(StreamTableEnvironment.scala:170)
at org.apache.flink.table.api.scala.StreamTableEnvironment.toAppendStream(StreamTableEnvironment.scala:146)
at org.apache.flink.table.api.scala.TableConversions.toAppendStream(TableConversions.scala:98)
at org.apache.flink.table.runtime.stream.sql.TemporalJoinITCase.testLateralJoin(TemporalJoinITCase.scala:88)
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$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
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.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
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:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)