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From "Lars Volker (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-4166: Add SORT BY sql clause
Date Sat, 06 May 2017 15:16:30 GMT
Lars Volker has posted comments on this change.

Change subject: IMPALA-4166: Add SORT BY sql clause

Patch Set 20:

> There is still one thing that is not clear to me. Why is it allowed
 > to do an ALTER TABLE with an empty SORT BY clause but not a CREATE

The easiest way to specify an empty list of sort by columns during CREATE TABLE is to omit
the SORT BY clause altogether. To keep things simple I did not add additional support for
an empty SORT BY () clause.

For ALTER TABLE there needs to be a way to specify an empty list of columns, but since SORT
BY is used to identify the command, the most simple form seemed to be an empty column list().

Do you think we should allow CREATE TABLE SORT BY() in addition to specify an empty set of

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Gerrit-MessageType: comment
Gerrit-Change-Id: I08834f38a941786ab45a4381c2732d929a934f75
Gerrit-PatchSet: 20
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Lars Volker <>
Gerrit-Reviewer: Alex Behm <>
Gerrit-Reviewer: Dimitris Tsirogiannis <>
Gerrit-Reviewer: Lars Volker <>
Gerrit-Reviewer: Marcel Kornacker <>
Gerrit-Reviewer: Thomas Tauber-Marshall <>
Gerrit-HasComments: No

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