Grant Henke has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/10574 )

Change subject: [java] Add equals and hashcode to Schema
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Patch Set 1:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/10574/1/java/kudu-client/src/main/java/org/apache/kudu/Schema.java
File java/kudu-client/src/main/java/org/apache/kudu/Schema.java:

http://gerrit.cloudera.org:8080/#/c/10574/1/java/kudu-client/src/main/java/org/apache/kudu/Schema.java@297
PS1, Line 297:
> What about columnsById? You can have two schemas, one with IDs and one with
columsById isn't a part of the public API and we can't reasonably expect users 
to know how to use it or set it when making "equivalent schemas". If we 
included columsById which are a server side detail best I can tell, a user 
won't be able to validate a user created schema with one returned from an 
openTable request using the equals method.

I agree dump equals methods are the best approach. But I think that dumb 
constructors are a pre-requisite.

It seams like the ideal approach is to push column ids as far back as possible 
(to the protobuf helper) and eliminate column ids from the apis.



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I0a6914b9b25df9e327ed6ae6bd61eac29c9c524c
Gerrit-Change-Number: 10574
Gerrit-PatchSet: 1
Gerrit-Owner: Grant Henke <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: Grant Henke <[email protected]>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Comment-Date: Sun, 03 Jun 2018 21:18:18 +0000
Gerrit-HasComments: Yes

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