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https://issues.apache.org/jira/browse/CMIS-212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12873789#action_12873789
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Jens Hübel commented on CMIS-212:
---------------------------------
Feedback:
Extensions are useful to have, for some repositories easy to implement.
Duplication of grammar for extension is considered to be a bad solution.
Extensions outside of standard should be clearly marked. A query implementation
that strictly follows the standard should not have to deal with the extensions
Suggestion:
Use two grammar files, one that follows the standard, one containing the
extensions. Use this mechanism for overriding the base grammars with
extensions:
http://www.antlr.org/wiki/display/ANTLR3/Composite+Grammars
This needs further investigation (has limitations, version dependency, maven
integration, etc.)
> opencmis CMISQL grammar is not standard compliant
> -------------------------------------------------
>
> Key: CMIS-212
> URL: https://issues.apache.org/jira/browse/CMIS-212
> Project: Chemistry
> Issue Type: Bug
> Components: opencmis-server
> Reporter: Jens Hübel
> Assignee: Jens Hübel
>
> Our antlr grammar is not compliant to CMIS 1.0:
> 1)
> DISTINCT is not allowed as keyword in CmisSQL
> 2)
> The rule "string value function" is no longer supported. It existed in
> earlier versions of the spec but was removed. The grammar in our code does
> not reflect this change in the specification.
> 3)
> only allowed operator with any is "=". The rule "quantified comparison
> predicate" was changed in the spec from allowing multiple comparison
> operators to only allow "=". The grammar in our code does not reflect this
> change in the specification.
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