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https://issues.apache.org/jira/browse/HIVE-24663?focusedWorklogId=600284&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-600284
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ASF GitHub Bot logged work on HIVE-24663:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 21/May/21 10:56
Start Date: 21/May/21 10:56
Worklog Time Spent: 10m
Work Description: pvary commented on a change in pull request #2266:
URL: https://github.com/apache/hive/pull/2266#discussion_r636827308
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/info/desc/DescTableOperation.java
##########
@@ -213,11 +214,14 @@ private void getColumnDataColPathSpecified(Table table,
Partition part, List<Fie
}
} else {
List<String> partitions = new ArrayList<String>();
- partitions.add(part.getName());
+ // The partition name is converted to lowercase before generating the
stats. So we should use the same
Review comment:
Isn't this an issue?
I mean the `key=US` an `key=us` should be a different partition key, so
modifying the values could cause issues later
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Issue Time Tracking
-------------------
Worklog Id: (was: 600284)
Time Spent: 1h 40m (was: 1.5h)
> Batch process in ColStatsProcessor for partitions.
> --------------------------------------------------
>
> Key: HIVE-24663
> URL: https://issues.apache.org/jira/browse/HIVE-24663
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Assignee: mahesh kumar behera
> Priority: Major
> Labels: performance, pull-request-available
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> When large number of partitions (>20K) are processed, ColStatsProcessor runs
> into DB issues.
> {{ db.setPartitionColumnStatistics(request);}} gets stuck for hours together
> and in some cases postgres stops processing.
> It would be good to introduce small batches for stats gathering in
> ColStatsProcessor instead of bulk update.
> Ref:
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/stats/ColStatsProcessor.java#L181
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/stats/ColStatsProcessor.java#L199
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