[jira] [Created] (FLINK-4270) 'as' in front of join does not work

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-4270:
-----------------------------------

             Summary: 'as' in front of join does not work
                 Key: FLINK-4270
                 URL: https://issues.apache.org/jira/browse/FLINK-4270
             Project: Flink
          Issue Type: Bug
          Components: Table API & SQL
            Reporter: Timo Walther


The following example passes the validation but fails during toRexNode phase:

{code}
    val customers = getCustomerDataSet(env).toTable(tEnv)
      .as('id, 'mktSegment)

    val orders = getOrdersDataSet(env).toTable(tEnv)
      .as('orderId, 'custId, 'orderDate, 'shipPrio)

    val items =
      orders.join(customers)
        .where('custId === 'id)
    items.printOnTaskManager("ok")
{code}

Leads to
{code}
Exception in thread "main" java.lang.IllegalArgumentException: field [custId] not found; input fields are: [id, mktSegment, id0, mktSegment0]
        at org.apache.calcite.tools.RelBuilder.field(RelBuilder.java:299)
        at org.apache.calcite.tools.RelBuilder.field(RelBuilder.java:284)
        at org.apache.flink.api.table.expressions.ResolvedFieldReference.toRexNode(fieldExpression.scala:59)
        at org.apache.flink.api.table.expressions.BinaryComparison$$anonfun$toRexNode$1.apply(comparison.scala:34)
        at org.apache.flink.api.table.expressions.BinaryComparison$$anonfun$toRexNode$1.apply(comparison.scala:34)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
        at scala.collection.AbstractTraversable.map(Traversable.scala:105)
        at org.apache.flink.api.table.expressions.BinaryComparison.toRexNode(comparison.scala:34)
        at org.apache.flink.api.table.plan.logical.Filter.construct(operators.scala:158)
        at org.apache.flink.api.table.plan.logical.LogicalNode.toRelNode(LogicalNode.scala:78)
        at org.apache.flink.api.table.Table.getRelNode(table.scala:66)
        at org.apache.flink.api.table.BatchTableEnvironment.translate(BatchTableEnvironment.scala:243)
        at org.apache.flink.api.scala.table.BatchTableEnvironment.toDataSet(BatchTableEnvironment.scala:139)
        at org.apache.flink.api.scala.table.package$.table2RowDataSet(package.scala:77)
        at org.apache.flink.examples.scala.TPCHQuery3Table$.main(TPCHQuery3Table.scala:119)
        at org.apache.flink.examples.scala.TPCHQuery3Table.main(TPCHQuery3Table.scala)
{code}



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