[teiid-issues] [JBoss JIRA] (TEIID-2815) Need to add the aggregate functions to list of supported functions, for Designer to expose for the user

[Steven Hawkins (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-2815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12939076#comment-12939076 ] 

Steven Hawkins commented on TEIID-2815:
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> Would be nice to have that option handled as maybe a separate/new call... SystemFunctionManager.getAggregateFunctions() ?

It would likely need to remain separate for the time being due to the legacy separation between functions and aggregate logic, but I'm fine if you want us to add something like that.  You may have to consult FunctionDescriptor.getMethod.getAggregateAttributes to know when distinct and ordering is allowed (we don't yet capture a notion of the * select all syntax as it's only supported for count\(*)) 

Do you use the FunctionForm class at all?  If not I'll clean that up as part of this change.
                
> Need to add the aggregate functions to list of supported functions, for Designer to expose for the user
> -------------------------------------------------------------------------------------------------------
>
>                 Key: TEIID-2815
>                 URL: https://issues.jboss.org/browse/TEIID-2815
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: Server
>    Affects Versions: 8.4.1
>            Reporter: Van Halbert
>            Assignee: Steven Hawkins
>
> Need to add to the list, of known supported functions, what are all the aggregate functions that are supported.  This list is what Teiid Designer would expose to the user for modeling purposes.

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