impala-reviews mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jim Apple (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR](asf-site) Impala and Hive have slightly different SQL they accept.
Date Thu, 06 Apr 2017 16:29:29 GMT
Jim Apple has posted comments on this change.

Change subject: Impala and Hive have slightly different SQL they accept.
......................................................................


Patch Set 1:

> Do not use the term 'compatible' or imply it.
 > 
 > https://wiki.apache.org/hadoop/Defining%20Hadoop#Compatibility
 > 
 > Some products have been released that have been described as
 > "compatible" with Hadoop, even though parts of the Hadoop codebase
 > have either been changed or replaced. The Apache™ Hadoop® developer
 > team are not a standards body: they do not qualify such
 > (derivative) works as compatible. Nor do they feel constrained by
 > the requirements of external entities when changing the behavior of
 > Apache Hadoop software or related Apache software.
 > 
 > Nothing is compatible with Apache Hive other than Apache Hive.

Edward, do you have any suggestions on how to say the following succinctly:

"Impala is similar to Hive in a number of ways which enable the two to be used in concert:

1. Impala stores metadata in the HMS in a way that all Hive versions between 2013(?) and March
2017 understand, and the Impala community intends for this to be the case going forward.

2. Impala presents an interface to the world that uses the same API as HS2 version P.Q.R-X.Y.Z,
and the Impala community intends for this to be the case going forward.

3. Impala, like Hive versions A.B.C-D.E.F, uses SQL, and there is a large shared subset of
SQL they both understand with the same semantics."

-- 
To view, visit http://gerrit.cloudera.org:8080/6567
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings

Gerrit-MessageType: comment
Gerrit-Change-Id: I4e38dc15c31dbb3e297e1d3f9e8251a1fa22d1a7
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: asf-site
Gerrit-Owner: Jim Apple <jbapple-impala@apache.org>
Gerrit-Reviewer: Anonymous Coward #290
Gerrit-Reviewer: Jim Apple <jbapple-impala@apache.org>
Gerrit-Reviewer: Matthew Jacobs <mj@cloudera.com>
Gerrit-HasComments: No

Mime
View raw message