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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/07/11 04:42:00 UTC
[jira] [Updated] (FLINK-13196) Fix Ambiguous column name exception
bug for Table API
[ https://issues.apache.org/jira/browse/FLINK-13196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated FLINK-13196:
-----------------------------------
Labels: pull-request-available (was: )
> Fix Ambiguous column name exception bug for Table API
> -----------------------------------------------------
>
> Key: FLINK-13196
> URL: https://issues.apache.org/jira/browse/FLINK-13196
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 1.9.0
> Reporter: Hequn Cheng
> Assignee: Hequn Cheng
> Priority: Major
> Labels: pull-request-available
>
> The following query should be valid, however, ambiguous column name exception is thrown.
> {code:java}
> val util = streamTestUtil()
> val table = util.addTable[(Long, Int, String)]('a, 'b, 'c)
> val resultTable = table
> .groupBy('b)
> .select('b, 'a.sum, 'a.sum, 'a.sum)
> {code}
> {code:java}
> org.apache.flink.table.api.ValidationException: Ambiguous column name: EXPR$0
> at org.apache.flink.table.operations.utils.factories.ProjectionOperationFactory.lambda$validateAndGetUniqueNames$4(ProjectionOperationFactory.java:103)
> {code}
> We should add some alias logic in {{AggregationAndPropertiesReplacer}} if the name has ever been used.
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