[teiid-issues] [JBoss JIRA] (TEIID-4717) Add Support for 'ALLOW FILTERING' in Teiid Cassandra Translator

[Vijay K (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-4717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13353159#comment-13353159 ] 

Vijay K edited comment on TEIID-4717 at 1/25/17 7:44 AM:
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I would prefer the first option "translator to infer this hint automatically from the index metadata on the source table".

If we can discuss and decide on the design, I can do the implementation.


was (Author: vijaynm):
I would prefer the first option "translator to infer this hint automatically from the index metadata on the source table"

> Add Support for 'ALLOW FILTERING' in Teiid Cassandra Translator
> ---------------------------------------------------------------
>
>                 Key: TEIID-4717
>                 URL: https://issues.jboss.org/browse/TEIID-4717
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: Misc. Connectors
>            Reporter: Vijay K
>              Labels: cassandra
>             Fix For: 9.3
>
>
> At certain times it is unavoidable to use few columns in the where clause which are not part of the index, in that case Cassandra driver throws error
> {color:red}Bad Request: Cannot execute this query as it might involve data filtering and thus may have unpredictable performance. If you want to execute this query despite the performance unpredictability, use ALLOW FILTERING{color}
> As as user I should be able to configure the Cassandra translator to append *ALLOW FILTERING* to the generated query (CQL)
> References:
> https://www.datastax.com/dev/blog/allow-filtering-explained-2
> https://developer.jboss.org/thread/239011



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