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Posted to commits@hudi.apache.org by "Alexey Kudinkin (Jira)" <ji...@apache.org> on 2022/03/31 16:06:00 UTC

[jira] [Created] (HUDI-3760) Fetch ColStats Records by Column name

Alexey Kudinkin created HUDI-3760:
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             Summary: Fetch ColStats Records by Column name
                 Key: HUDI-3760
                 URL: https://issues.apache.org/jira/browse/HUDI-3760
             Project: Apache Hudi
          Issue Type: Bug
            Reporter: Alexey Kudinkin
            Assignee: Alexey Kudinkin
             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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