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https://issues.apache.org/jira/browse/FLINK-7339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-7339:
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Labels: stale-assigned (was: )
> aggregationToString fails when user defined aggregation contains constants
> --------------------------------------------------------------------------
>
> Key: FLINK-7339
> URL: https://issues.apache.org/jira/browse/FLINK-7339
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream, Table SQL / API
> Affects Versions: 1.3.1
> Reporter: Stefano Bortoli
> Assignee: Fabian Hueske
> Priority: Major
> Labels: stale-assigned
>
> Issue related to FLINK-7338, when the user defined aggregation contains a
> constant it breaks the aggregation translation to string, which are mapped 1
> to 1 to the input fields.
> OverAggregates.scala aggregationToString function fails to find a parameter
> of the function among the input fields, and therefore throws a
> RuntimeException.
> {code}
> private[flink] def aggregationToString(
> inputType: RelDataType,
> rowType: RelDataType,
> namedAggregates: Seq[CalcitePair[AggregateCall, String]]): String = {
> val inFields = inputType.getFieldNames.asScala
> val outFields = rowType.getFieldNames.asScala
> val aggStrings = namedAggregates.map(_.getKey).map(
> a => s"${a.getAggregation}(${
> if (a.getArgList.size() > 0) {
> // ERROR HAPPENS HERE!
> a.getArgList.asScala.map(inFields(_)).mkString(", ")
> } else {
> "*"
> }
> })")
> (inFields ++ aggStrings).zip(outFields).map {
> case (f, o) => if (f == o) {
> f
> } else {
> s"$f AS $o"
> }
> }.mkString(", ")
> }
> {code}
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