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From "Alex Behm (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-4289: Mark agg slots of NDV() functions as non-nullable.
Date Thu, 13 Oct 2016 00:07:10 GMT
Alex Behm has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/4707

Change subject: IMPALA-4289: Mark agg slots of NDV() functions as non-nullable.
......................................................................

IMPALA-4289: Mark agg slots of NDV() functions as non-nullable.

This change might give a minor speedup to COMPUTE STATS
and COMPUTE INCREMENTAL STATS. In any case, marking the slots
non-nullable seems strictly better than leaving them nullable.

Testing: I ran our local testdata/compute-table-stats.sh and
it succeeded.

Change-Id: I1c05b8dfb797b2a42ee1a7bf14ad56bb83d2b1c5
---
M fe/src/main/java/org/apache/impala/analysis/AggregateInfoBase.java
1 file changed, 6 insertions(+), 3 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/07/4707/1
-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I1c05b8dfb797b2a42ee1a7bf14ad56bb83d2b1c5
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Alex Behm <alex.behm@cloudera.com>

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