[teiid-issues] [JBoss JIRA] (TEIID-3522) Provide Data Aggregation Extension to OData V4

[Steven Hawkins (Jira)]

    [ https://issues.jboss.org/browse/TEIID-3522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13710411#comment-13710411 ] 

Steven Hawkins commented on TEIID-3522:
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[~rareddy] This will take a good bit of effort.  I'm just now to supporting top level aggregates, effectively "select agg(x) from ..." without a group by.

I haven't ensured that it works over cross joins, or with other standard query options.

The olingo changes to support just this so far are:  https://github.com/shawkins/olingo-odata4/commit/76ebd8886444893dd6cbfccdef0878705324f077

The Teiid changes, that are a work in progress are:  https://github.com/shawkins/teiid/tree/TEIID-3522 and in particular the commit: https://github.com/shawkins/teiid/commit/a6c568b2b3f7a24d9f89bedf3ddd902a0b484f60



> Provide Data Aggregation Extension to OData V4
> ----------------------------------------------
>
>                 Key: TEIID-3522
>                 URL: https://issues.jboss.org/browse/TEIID-3522
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: OData
>            Reporter: Ramesh Reddy
>            Assignee: Steven Hawkins
>            Priority: Major
>             Fix For: 12.2
>
>
> OData V4 specification defines extension for Data Aggregation http://docs.oasis-open.org/odata/odata-data-aggregation-ext/v4.0/cs01/odata-data-aggregation-ext-v4.0-cs01.html
> Teiid should provide support for this extension. There is Olingo support on this yet.



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