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https://issues.apache.org/jira/browse/IGNITE-4523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15831966#comment-15831966
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Alexei Scherbakov commented on IGNITE-4523:
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I wanted to do so from the beginning, but Vladimir Ozerov has asked me to move
it to upper level, and throw an exception for unsupported cases.
> Allow distributed SQL query execution over explicit set of partitions
> ---------------------------------------------------------------------
>
> Key: IGNITE-4523
> URL: https://issues.apache.org/jira/browse/IGNITE-4523
> Project: Ignite
> Issue Type: Improvement
> Components: cache, SQL
> Affects Versions: 1.8
> Reporter: Alexei Scherbakov
> Assignee: Alexei Scherbakov
> Fix For: 1.9
>
>
> 3Currently distributed SQL query is executed on all nodes containing primary
> partitions for a cache, sending map query requests on all nodes in grid.
> Sometimes we know in advance which partitions hold a data for query, on
> example, in case of custom affinity function.
> Therefore it's possible to reduce number of nodes receiving map query request
> by providing explicit set of partitions, which will give significant
> performance advantage and traffic reduction in case of very large clusters.
> Internally we already have such functionality, so the only necessary thing is
> to provide public API for what.
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