ngsg commented on code in PR #5674:
URL: https://github.com/apache/hive/pull/5674#discussion_r2024835915
##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/columnstats/aggr/LongColumnStatsAggregator.java:
##########
@@ -192,7 +207,13 @@ public ColumnStatisticsObj
aggregate(List<ColStatsObjWithSourceInfo> colStatsWit
csd.setLongStats(aggregateData);
adjustedStatsMap.put(pseudoPartName.toString(), csd);
if (useDensityFunctionForNDVEstimation) {
- densityAvgSum += ((double) (aggregateData.getHighValue() -
aggregateData.getLowValue())) / aggregateData.getNumDVs();
+ if (aggregateData.getNumDVs() == 0) {
+ // If NDV is not present, assume that the density is 0.5.
+ densityAvgSum += 0.5;
+ } else {
+ double range = aggregateData.getHighValue() -
aggregateData.getLowValue();
Review Comment:
I removed `range` variable and reverted the code to original version.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
