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https://issues.apache.org/jira/browse/OODT-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris A. Mattmann resolved OODT-336.
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Resolution: Fixed
- fixed in r1206971. Thanks Ricky!
> xmlps should omit joining of tables that are unnecessary to fulfill query
> -------------------------------------------------------------------------
>
> Key: OODT-336
> URL: https://issues.apache.org/jira/browse/OODT-336
> Project: OODT
> Issue Type: Improvement
> Components: xmlps
> Affects Versions: 0.4
> Reporter: Ricky Nguyen
> Assignee: Chris A. Mattmann
> Fix For: 0.4
>
> Attachments: rickdn-oodt-336-clean.patch, rickdn-oodt-336.patch
>
>
> Suppose we have tables A, B and C. If we are only querying and returning
> fields from A and B, then the inclusion of table C in the SQL join statement
> will produce repeated entries of matching rows. It would be beneficial if
> XMLPS could intelligently select the required join tables from the fields in
> the query.
> In CHLA's specific case, table C causes millions of repeated rows (and
> subsequently OutOfMemory java heap space error).
> I have a proposed fix that I can upload shortly.
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