[
https://issues.apache.org/jira/browse/HIVE-23806?focusedWorklogId=457999&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-457999
]
ASF GitHub Bot logged work on HIVE-23806:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Jul/20 11:47
Start Date: 13/Jul/20 11:47
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on a change in pull request #1215:
URL: https://github.com/apache/hive/pull/1215#discussion_r453592530
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/utils/MetaStoreServerUtils.java
##########
@@ -501,6 +502,28 @@ public static boolean areSameColumns(List<FieldSchema>
oldCols, List<FieldSchema
return ListUtils.isEqualList(oldCols, newCols);
}
+ /**
+ * Returns true if p is a prefix of s.
+ */
+ public static boolean arePrefixColumns(List<FieldSchema> p,
List<FieldSchema> s) {
+ if (p == s) {
+ return true;
+ }
+ if (p.size() > s.size()) {
+ return false;
+ }
+ Iterator itP = p.iterator();
Review comment:
of course! :)
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Issue Time Tracking
-------------------
Worklog Id: (was: 457999)
Time Spent: 40m (was: 0.5h)
> Avoid clearing column stat states in all partition in case schema is extended
> -----------------------------------------------------------------------------
>
> Key: HIVE-23806
> URL: https://issues.apache.org/jira/browse/HIVE-23806
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> in case there are many partitions; adding a new column without cascade may
> take a while - because we want to make sure in schema evolution cases that we
> don't reuse stats later-on by mistake...
> however this is not neccessary in case the schema is extended
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