[jira] [Commented] (IGNITE-20006) Calcite engine. Make table/index scan iterators yieldable

["Ivan Daschinsky (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-20006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17749849#comment-17749849 ] 

Ivan Daschinsky commented on IGNITE-20006:
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[~alex_pl] Looks good to me

> Calcite engine. Make table/index scan iterators yieldable 
> ----------------------------------------------------------
>
>                 Key: IGNITE-20006
>                 URL: https://issues.apache.org/jira/browse/IGNITE-20006
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Aleksey Plekhanov
>            Assignee: Aleksey Plekhanov
>            Priority: Major
>              Labels: calcite, ise
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> Currently, index/table iterators can scan unpredictable count of cache entries during one {{hasNext()}}/{{next()}} call. These iterators contain filter, which applyed to each entry and row produced only for entries that satisfy filter. If filter contains "always false" rule, one {{hasNext()}} call may scan entiry table uninterruptably, without timeouts and yields to make another queries do their job. We should fix this behaviour.



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