[teiid-issues] [JBoss JIRA] (TEIID-3750) Allow the parsing of an expression

[Jan Stastny (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-3750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592199#comment-13592199 ] 

Jan Stastny commented on TEIID-3750:
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> > According to docs, VIRTUAL FUNCTION can have DEFAULT value specified.
> Could have been a copy and paste error from procedures. It's not supported, so that should be corrected.
Well, it's not mentioned explicitly anywhere, though I got the impression that BNF allows that in (1), as both FUNCTION and PROCEDURE share the procedure parameter definition in (2). So only BNF is more relaxed, than the current support is. That's alright I guess. (Even though it would be probably better for the VDB not to deploy at all.)

(1) https://teiid.gitbooks.io/documents/content/reference/BNF_for_SQL_Grammar.html#createDDLProcedure
(2) https://teiid.gitbooks.io/documents/content/reference/BNF_for_SQL_Grammar.html#procedureParameter

> Allow the parsing of an expression
> ----------------------------------
>
>                 Key: TEIID-3750
>                 URL: https://issues.jboss.org/browse/TEIID-3750
>             Project: Teiid
>          Issue Type: Sub-task
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 9.0, 8.12.14.6_4
>
>
> Now that we have an extension property, we could allow an expression to be used in parsing rather than just a string.



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