[ https://issues.apache.org/jira/browse/HIVE-23095?focusedWorklogId=415864&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-415864
]
ASF GitHub Bot logged work on HIVE-23095:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Apr/20 00:59
Start Date: 04/Apr/20 00:59
Worklog Time Spent: 10m
Work Description: prasanthj commented on pull request #964: HIVE-23095 ndv 70
URL: https://github.com/apache/hive/pull/964#discussion_r403398823
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File path: standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/common/ndv/hll/HLLSparseRegister.java
##########
@@ -195,7 +199,7 @@ public void extractLowBitsTo(HLLRegister dest) {
byte lr = entry.getValue(); // this can be a max of 65, never > 127
if (lr != 0) {
// should be a no-op for sparse
- dest.add((long) ((1 << (p + lr - 1)) | idx));
+ dest.add((1 << (p + lr - 1)) | idx);
Review comment:
nit: just noticing this. To be safe wrt overflow can you make it `1L << (p + lr -
1)`
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Issue Time Tracking
-------------------
Worklog Id: (was: 415864)
> NDV might be overestimated for a table with ~70 value
> -----------------------------------------------------
>
> Key: HIVE-23095
> URL: https://issues.apache.org/jira/browse/HIVE-23095
> Project: Hive
> Issue Type: Bug
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-23095.01.patch, HIVE-23095.02.patch, HIVE-23095.03.patch, HIVE-23095.04.patch,
HIVE-23095.04.patch, HIVE-23095.04.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> uncovered during looking into HIVE-23082
> https://issues.apache.org/jira/browse/HIVE-23082?focusedCommentId=17067773&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17067773
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