[teiid-issues] [JBoss JIRA] (TEIID-2578) add/remove schema elements

[Ramesh Reddy (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-2578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13310661#comment-13310661 ] 

Ramesh Reddy commented on TEIID-2578:
-------------------------------------

>>It seems like if a non-master cluster member comes up after any changes have been made, it won't have those changes synched until after the vdb is reloaded by another change. 
In this singleton service scheme, only master should have the persistent copy of VDBs, so if non-master node comes up it should be empty to start with. As soon as master node starts it should replicate the events. (atleast that is what I think :) ), but issue could be, what if master node went down in-between and comes back up, it is going to duplicate the state, that needs to be avoided. I did not add any provision for this, IMO we need to maintain a VDB wide version/lastmodified number that can be passed with *all* EventDistributor methods. aka. like a if-match-none HEADER in http, What do you think?

> add/remove schema elements
> --------------------------
>
>                 Key: TEIID-2578
>                 URL: https://issues.jboss.org/browse/TEIID-2578
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Query Engine
>            Reporter: Ramesh Reddy
>            Assignee: Ramesh Reddy
>             Fix For: 9.2
>
>
> Schemas are currently static after load.  Modifications can only happen with restarts or new versions.  We should allow add/drop at runtime.



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