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Posted to commits@hudi.apache.org by "Raymond Xu (Jira)" <ji...@apache.org> on 2022/04/05 15:47:00 UTC

[jira] [Commented] (HUDI-3760) Rebase ColStats onto fetching Records by Column prefix

    [ https://issues.apache.org/jira/browse/HUDI-3760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17517522#comment-17517522 ] 

Raymond Xu commented on HUDI-3760:
----------------------------------

check S3 event logs for timestamp of get calls

> Rebase ColStats onto fetching Records by Column prefix
> ------------------------------------------------------
>
>                 Key: HUDI-3760
>                 URL: https://issues.apache.org/jira/browse/HUDI-3760
>             Project: Apache Hudi
>          Issue Type: Bug
>            Reporter: Alexey Kudinkin
>            Assignee: Alexey Kudinkin
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 0.11.0
>
>
> Right now all the records from ColStats for _all columns,_ for _all files_ are being read to compose the index used in Data Skipping.
> In reality, individual queries touch up only a handful of columns at any given moment, so we can very effectively prune the # of records we fetch simply fetching records for the columns referenced in the query (by the key prefix, since CS record key is concatenation of column, partition-path, filename)



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