[teiid-issues] [JBoss JIRA] (TEIID-2691) Grouping expression with view fails when grouping columns have the same name

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-2691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-2691.
-----------------------------------

    Resolution: Done


Updated the logic to use the raw expression from the compensating view projection.
                
> Grouping expression with view fails when grouping columns have the same name
> ----------------------------------------------------------------------------
>
>                 Key: TEIID-2691
>                 URL: https://issues.jboss.org/browse/TEIID-2691
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.5
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 8.6
>
>
> If a source supports views, but not grouping expression, and grouping/select columns have the same short name, then the view creation logic will fail with:
> ERROR [org.teiid.PROCESSOR] (Worker8_QueryProcessorQueue6859) caU8stCGl+8r TEIID30019 Unexpected exception for request caU8stCGl+8r.0: java.lang.AssertionError: Cannot create AliasSymbol wrapping AliasSymbol
>   at org.teiid.core.util.Assertion.failed(Assertion.java:73) [teiid-common-core-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.symbol.AliasSymbol.setSymbol(AliasSymbol.java:76) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.visitor.ExpressionMappingVisitor.visit(ExpressionMappingVisitor.java:159) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.symbol.AliasSymbol.acceptVisitor(AliasSymbol.java:90) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.AbstractNavigator.visitVisitor(AbstractNavigator.java:54) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.preVisitVisitor(PreOrPostOrderNavigator.java:54) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.visit(PreOrPostOrderNavigator.java:77) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.symbol.AliasSymbol.acceptVisitor(AliasSymbol.java:90) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.AbstractNavigator.visitNode(AbstractNavigator.java:63) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.visit(PreOrPostOrderNavigator.java:297) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.lang.OrderByItem.acceptVisitor(OrderByItem.java:87) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.AbstractNavigator.visitNode(AbstractNavigator.java:63) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.AbstractNavigator.visitNodes(AbstractNavigator.java:76) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.visit(PreOrPostOrderNavigator.java:291) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.lang.OrderBy.acceptVisitor(OrderBy.java:136) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.navigator.PreOrPostOrderNavigator.doVisit(PreOrPostOrderNavigator.java:669) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.sql.visitor.ExpressionMappingVisitor.mapExpressions(ExpressionMappingVisitor.java:394) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]
>   at org.teiid.query.optimizer.relational.rules.RuleCollapseSource.rewriteGroupByAsView(RuleCollapseSource.java:741) [teiid-engine-8.5.0.Final.jar:8.5.0.Final]

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