Ken Geis created FLINK-9395:
-------------------------------
Summary: multiple left outer joins to subqueries with array values
fail
Key: FLINK-9395
URL: https://issues.apache.org/jira/browse/FLINK-9395
Project: Flink
Issue Type: Bug
Reporter: Ken Geis
Attachments: JoinTest.java
Where {{a}} is a table with column {{id}}, the following query succeeds:
{code:sql}
SELECT * FROM a
LEFT OUTER JOIN (SELECT id, ARRAY[id] AS b FROM a) AS b ON a.id = b.id
{code}
I add another join:
{code:sql}
SELECT * FROM a
LEFT OUTER JOIN (SELECT id, ARRAY[id] AS b FROM a) AS b ON a.id = b.id
LEFT OUTER JOIN (SELECT id, ARRAY[id] AS b FROM a) AS c ON a.id = c.id
{code}
This fails with the error:
{noformat}
org.apache.flink.api.common.InvalidProgramException: Selected sort key is not a
sortable type
at
org.apache.flink.api.java.operators.SortPartitionOperator.ensureSortableKey(SortPartitionOperator.java:145)
at
org.apache.flink.api.java.operators.SortPartitionOperator.sortPartition(SortPartitionOperator.java:111)
at
org.apache.flink.table.plan.nodes.dataset.DataSetJoin$$anonfun$partitionAndSort$1.apply(DataSetJoin.scala:466)
at
org.apache.flink.table.plan.nodes.dataset.DataSetJoin$$anonfun$partitionAndSort$1.apply(DataSetJoin.scala:465)
at
scala.collection.IndexedSeqOptimized$class.foldl(IndexedSeqOptimized.scala:57)
at
scala.collection.IndexedSeqOptimized$class.foldLeft(IndexedSeqOptimized.scala:66)
at scala.collection.mutable.ArrayOps$ofInt.foldLeft(ArrayOps.scala:234)
at
org.apache.flink.table.plan.nodes.dataset.DataSetJoin.partitionAndSort(DataSetJoin.scala:465)
at
org.apache.flink.table.plan.nodes.dataset.DataSetJoin.addLeftOuterJoin(DataSetJoin.scala:268)
at
org.apache.flink.table.plan.nodes.dataset.DataSetJoin.translateToPlan(DataSetJoin.scala:176)
at
org.apache.flink.table.api.BatchTableEnvironment.translate(BatchTableEnvironment.scala:399)
at
org.apache.flink.table.api.BatchTableEnvironment.translate(BatchTableEnvironment.scala:378)
at
org.apache.flink.table.api.java.BatchTableEnvironment.toDataSet(BatchTableEnvironment.scala:146)
{noformat}
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