[jira] [Commented] (PARQUET-2237) Improve performance when filters in RowGroupFilter can match exactly

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PARQUET-2237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17695963#comment-17695963 ] 

ASF GitHub Bot commented on PARQUET-2237:
-----------------------------------------

yabola commented on PR #1039:
URL: https://github.com/apache/parquet-mr/pull/1039#issuecomment-1452828333

   @wgtmac @gszadovszky If you have time, please take a look, thank you




> Improve performance when filters in RowGroupFilter can match exactly
> --------------------------------------------------------------------
>
>                 Key: PARQUET-2237
>                 URL: https://issues.apache.org/jira/browse/PARQUET-2237
>             Project: Parquet
>          Issue Type: Improvement
>            Reporter: Mars
>            Priority: Major
>
> If we can accurately judge by the minMax status, we don’t need to load the dictionary from filesystem and compare one by one anymore.
> Similarly , Bloomfilter needs to load from filesystem, it may costs time and memory. If we can exactly determine the existence/nonexistence of the value from minMax or dictionary filters , then we can avoid using Bloomfilter to Improve performance.
> For example,
>  # read data greater than {{x1}} in the block, if minMax in status is all greater than {{{}x1{}}}, then we don't need to read dictionary and compare one by one.
>  # If we already have page dictionaries and have compared one by one, we don't need to read BloomFilter and compare.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)