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https://issues.apache.org/jira/browse/IGNITE-18517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yury Gerzhedovich updated IGNITE-18517:
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Epic Link: IGNITE-19479
> Sql. SELECT with LIMIT prefetch more data than necessary.
> ---------------------------------------------------------
>
> Key: IGNITE-18517
> URL: https://issues.apache.org/jira/browse/IGNITE-18517
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Evgeny Stanilovsky
> Priority: Major
> Labels: calcite2-required, calcite3-required
>
> This is just an optimization issue, not bug.
> Simple distributed request like : SELECT * FROM T LIMIT N;
> {noformat}
> IgniteLimit
> IgniteExchange
> IgniteTableScan
> {noformat}
> need to request (maximum) N rows from each TableScan, but for now requested :
> Outbox#flush -> source().request(waiting = IN_BUFFER_SIZE);
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