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From "Alex Behm (Code Review)" <ger...@cloudera.org>
Subject [Impala-CR](cdh5-trunk) IMPALA-2805: Order conjuncts based on selectivity and cost
Date Wed, 20 Apr 2016 21:07:58 GMT
Alex Behm has posted comments on this change.

Change subject: IMPALA-2805: Order conjuncts based on selectivity and cost
......................................................................


Patch Set 13:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/2598/13/fe/src/main/java/com/cloudera/impala/planner/PlanNode.java
File fe/src/main/java/com/cloudera/impala/planner/PlanNode.java:

Line 657:       double backoff_exp = 1.0 / (double) (sortedConjuncts.size() + 1);
> the backoff affects the additive term (totalcost - e.cost), which is scaled
You are right. Got it.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I02279a26fbc6308ac5eb819d78345fc010469034
Gerrit-PatchSet: 13
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Thomas Tauber-Marshall <tmarshall@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.behm@cloudera.com>
Gerrit-Reviewer: Henry Robinson <henry@cloudera.com>
Gerrit-Reviewer: Marcel Kornacker <marcel@cloudera.com>
Gerrit-Reviewer: Matthew Jacobs <mj@cloudera.com>
Gerrit-Reviewer: Mostafa Mokhtar <mmokhtar@cloudera.com>
Gerrit-Reviewer: Thomas Tauber-Marshall <tmarshall@cloudera.com>
Gerrit-HasComments: Yes

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