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https://issues.apache.org/jira/browse/SOLR-1262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson resolved SOLR-1262.
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Resolution: Won't Fix
2013 Old JIRA cleanup
> DIH needs support for callable statements
> ------------------------------------------
>
> Key: SOLR-1262
> URL: https://issues.apache.org/jira/browse/SOLR-1262
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Affects Versions: 1.3
> Environment: linux
> mysql
> Reporter: Abdul Chaudhry
> Assignee: Noble Paul
> Priority: Minor
>
> During an indexing run we noticed that we were spending a lot of time
> creating and tearing down queries in mysql
> The queries we are using are complex and involve joins spanning across
> multiple tables.
> We should support prepared statements in the data import handler via the
> data-config.xml file - for those databases that support prepared statements.
> We could add a new attribute to the entity entity in dataConfig - say -
> pquery or preparedQuery and then pass the prepared statement and have values
> filled in by the actual queries for each row using a placeholder - like a ?
> or something else.
> I would probably start by hacking class JdbcDataSource to try a test but was
> wondering if anyone had experienced this or had any suggestions or if there
> is something in the works that I missed - I couldn't find any other bugs
> mentioning using prepared statements for performance.
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