[jira] [Work logged] (HIVE-27238) Avoid Calcite Code generation for RelMetaDataProvider on every query

Sun, 09 Apr 2023 20:54:04 -0700 


     [ 
https://issues.apache.org/jira/browse/HIVE-27238?focusedWorklogId=855676&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-855676
 ]

ASF GitHub Bot logged work on HIVE-27238:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 10/Apr/23 03:53
            Start Date: 10/Apr/23 03:53
    Worklog Time Spent: 10m 
      Work Description: sonarcloud[bot] commented on PR #4212:
URL: https://github.com/apache/hive/pull/4212#issuecomment-1501359074

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 855676)
    Time Spent: 20m  (was: 10m)

> Avoid Calcite Code generation for RelMetaDataProvider on every query
> --------------------------------------------------------------------
>
>                 Key: HIVE-27238
>                 URL: https://issues.apache.org/jira/browse/HIVE-27238
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>            Reporter: Steve Carlin
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> In CalcitePlanner, we are instantiating a new CachingRelMetadataProvider on 
> every query.  Within the Calcite code, they keep the provider key to prevent 
> a new MetadataHandler class from being created.  But by generating a new 
> provider, the cache never gets a hit so we keep instantiating new 
> MetadataHandlers.



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