Bharath Vissapragada has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/12181 )

Change subject: IMPALA-7832: Support for IF NOT EXISTS in ALTER TABLE ADD 
COLUMN(S)
......................................................................


Patch Set 7: Code-Review+1

(5 comments)

Nice test coverage. Paul, looks like you had some comments about refactoring. 
Can you take the final pass?

http://gerrit.cloudera.org:8080/#/c/12181/7/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java
File fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java:

http://gerrit.cloudera.org:8080/#/c/12181/7/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java@612
PS7, Line 612: Column
nit: Column(s) have.., here and below.


http://gerrit.cloudera.org:8080/#/c/12181/7/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java@2046
PS7, Line 2046: nonExistingColumns
nit: I think colsToAdd will be more clear. Please ignore if you disagree.


http://gerrit.cloudera.org:8080/#/c/12181/7/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java@2049
PS7, Line 2049: if (ifNotExists && col != null) {
              :         continue;
              :       }
single line and else if below?


http://gerrit.cloudera.org:8080/#/c/12181/7/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java@2053
PS7, Line 2053: AnalysisException
We are past analysis at this point. Throw a CatalogException? Also, include the 
tbl name?


http://gerrit.cloudera.org:8080/#/c/12181/7/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java@2057
PS7, Line 2057: and ifNotExists is true, do nothing
we don't use it anymore, update?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I60ed22c8a8eefa10e94ad3dedf32fe67c16642d9
Gerrit-Change-Number: 12181
Gerrit-PatchSet: 7
Gerrit-Owner: Fredy Wijaya <fwij...@cloudera.com>
Gerrit-Reviewer: Bharath Vissapragada <bhara...@cloudera.com>
Gerrit-Reviewer: Fredy Wijaya <fwij...@cloudera.com>
Gerrit-Reviewer: Greg Rahn <gr...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Paul Rogers <prog...@cloudera.com>
Gerrit-Comment-Date: Fri, 18 Jan 2019 19:41:34 +0000
Gerrit-HasComments: Yes

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