[teiid-issues] [JBoss JIRA] (TEIID-5725) Please improve documentation on definition of stored procedures, virtual functions and virtual procedures

[Steven Hawkins (Jira)]

    [ https://issues.jboss.org/browse/TEIID-5725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725712#comment-13725712 ] 

Steven Hawkins commented on TEIID-5725:
---------------------------------------

You have two options currently.  A temporary table:

insert into #temp select a,b from table where table.c = 0;

declare integer b = (select b from #temp);
...

Obviously this can work when you have more than one row.

The other option is an array:

declare integer[] val = (select (a,b) from table where table.c = 0);

then use array indexing to access a or b with val[1] or val[2]


> Please improve documentation on definition of stored procedures, virtual functions and virtual procedures
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: TEIID-5725
>                 URL: https://issues.jboss.org/browse/TEIID-5725
>             Project: Teiid
>          Issue Type: Enhancement
>            Reporter: Christoph John
>            Assignee: Steven Hawkins
>            Priority: Critical
>
> I refer to the discussion with Ramesh in 
> https://developer.jboss.org/message/989048#989048 and would like to ask for a more detailed explanation on how to write virtual procedures and functions. 
> -Especially, how are OUT and INOUT params set and how can they be obtained via odata. 
> - How is the return value of a virtual function set?
> - How are collections and arrays of collections returned?



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