我的flink 版本是 flink-1.12.2-bin-scala_2.12
我的sql 是
SELECT o.order_id, o.total, c.country, c.zip
FROM Orders AS o
JOIN Customers FOR SYSTEM_TIME AS OF o.proc_time AS c
ON o.customer_id = c.id and o.customer_id is not null and c.id is not null
;
或者
SELECT o.order_id, o.total, c.country, c.zip
FROM Orders AS o
JOIN Customers FOR SYSTEM_TIME AS OF o.proc_time AS c
ON o.customer_id = c.id ;
都会报如下错误，麻烦帮我看看正确的写法是什么样的，灰常感谢
Exception in thread "main" org.apache.flink.table.api.ValidationException:
Currently the join key in Temporal Table Join can not be empty.
at
org.apache.flink.table.planner.plan.rules.logical.LogicalCorrelateToJoinFromGeneralTemporalTableRule.onMatch(LogicalCorrelateToJoinFromTemporalTableRule.scala:272)
at
org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:333)
at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:542)
at org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:407)
at
org.apache.calcite.plan.hep.HepPlanner.executeInstruction(HepPlanner.java:243)
at
org.apache.calcite.plan.hep.HepInstruction$RuleInstance.execute(HepInstruction.java:127)
at org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:202)
at org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:189)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkHepProgram.optimize(FlinkHepProgram.scala:69)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkHepRuleSetProgram.optimize(FlinkHepRuleSetProgram.scala:87)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram.$anonfun$optimize$2(FlinkGroupProgram.scala:63)
at scala.collection.TraversableOnce$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.FlinkGroupProgram.$anonfun$optimize$1(FlinkGroupProgram.scala:60)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram.$anonfun$optimize$1$adapted(FlinkGroupProgram.scala:55)
at scala.collection.TraversableOnce$folder$1.apply(TraversableOnce.scala:196)
at scala.collection.TraversableOnce$folder$1.apply(TraversableOnce.scala:194)
at scala.collection.immutable.Range.foreach(Range.scala:158)
at scala.collection.TraversableOnce.foldLeft(TraversableOnce.scala:199)
at scala.collection.TraversableOnce.foldLeft$(TraversableOnce.scala:192)
at scala.collection.AbstractTraversable.foldLeft(Traversable.scala:108)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram.optimize(FlinkGroupProgram.scala:55)
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:287)
at
org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:160)
at
org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:1329)
at
org.apache.flink.table.api.internal.TableEnvironmentImpl.executeInternal(TableEnvironmentImpl.java:707)
at org.apache.flink.table.api.internal.TableImpl.execute(TableImpl.java:577)
