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https://issues.apache.org/jira/browse/HIVE-4732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770288#comment-13770288
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Edward Capriolo commented on HIVE-4732:
---------------------------------------
I do disagree, because it is not complex to generate a GUID that will never
collide.
http://www.javapractices.com/topic/TopicAction.do?Id=56
An implementation would likely replace 1 line of code with between 2 to 4. It
is not a complex task and there are probably hundreds of references on how to
do this on the internet.
{code}
import java.rmi.server.UID;
public class UniqueId {
/**
* Build and display some UID objects.
*/
public static void main (String... arguments) {
for (int idx=0; idx<10; ++idx){
UID userId = new UID();
System.out.println("User Id: " + userId);
}
}
}
{code}
Would you rather have:
1) a parachute that very very rarely does not work
2) a parachute that always works
:)
> Reduce or eliminate the expensive Schema equals() check for AvroSerde
> ---------------------------------------------------------------------
>
> Key: HIVE-4732
> URL: https://issues.apache.org/jira/browse/HIVE-4732
> Project: Hive
> Issue Type: Improvement
> Components: Serializers/Deserializers
> Reporter: Mark Wagner
> Assignee: Mohammad Kamrul Islam
> Attachments: HIVE-4732.1.patch, HIVE-4732.4.patch, HIVE-4732.5.patch,
> HIVE-4732.v1.patch, HIVE-4732.v4.patch
>
>
> The AvroSerde spends a significant amount of time checking schema equality.
> Changing to compare hashcodes (which can be computed once then reused) will
> improve performance.
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