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Posted to issues@calcite.apache.org by "yunfeng (Jira)" <ji...@apache.org> on 2019/10/28 08:02:00 UTC

[jira] [Commented] (CALCITE-3442) set `stored_fields = _none_` prohibit `FetchPhase` get be involved and improve the performance for Elasticsearch

    [ https://issues.apache.org/jira/browse/CALCITE-3442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16960842#comment-16960842 ] 

yunfeng commented on CALCITE-3442:
----------------------------------

I update this PR and the diff file attachment.

> set `stored_fields = _none_` prohibit `FetchPhase` get be involved and improve the performance for Elasticsearch
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-3442
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3442
>             Project: Calcite
>          Issue Type: Improvement
>          Components: elasticsearch-adapter
>            Reporter: yunfeng
>            Priority: Major
>              Labels: performance, pull-request-available
>             Fix For: next
>
>         Attachments: elasticsearch-adapter.diff
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
>  For elasticsearch-adapter,   when  ElasticsearchAggregate  involved , set _source = false and size = 0 , Elasticsearch `FetchPhase` would still be executed against the current  search process and visit the Lucene stored_fields, which would lead to performance declined dramatically.  
> We can set `stored_fields = _none` prohibit this such behavior completely



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