Bharath Vissapragada has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/12136 )

Change subject: IMPALA-8021: Add estimated cardinality to EXPLAIN output
......................................................................


Patch Set 12:

(2 comments)

A couple of clarifications after looking at the TestUtils code again.

http://gerrit.cloudera.org:8080/#/c/12136/12/fe/src/test/java/org/apache/impala/testutil/TestUtils.java
File fe/src/test/java/org/apache/impala/testutil/TestUtils.java:

http://gerrit.cloudera.org:8080/#/c/12136/12/fe/src/test/java/org/apache/impala/testutil/TestUtils.java@207
PS12, Line 207:  If found, then parse the values and compare them. Report a 
match
              :    * if the values are within 5%, else report a mismatch.
> Is this because of the loss of information during pretty printing and then
Actually, looking at this again, it appears that we are just comparing the 
pretty printed cardinalities (actual and expected). So, my understanding above 
is wrong I think. I'm wondering why we see values that are 5% off. Do some 
tests fail without this?


http://gerrit.cloudera.org:8080/#/c/12136/12/fe/src/test/java/org/apache/impala/testutil/TestUtils.java@226
PS12, Line 226: SKIP
> you mean DIFF? (same below)
To be clear, if something is unparseable, I'm guessing something went wrong or 
is this for handling (cardinality = unavailable) part?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ie9aa2d715b04cbb279aaffec8c5692686562d986
Gerrit-Change-Number: 12136
Gerrit-PatchSet: 12
Gerrit-Owner: Paul Rogers <prog...@cloudera.com>
Gerrit-Reviewer: Bharath Vissapragada <bhara...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Paul Rogers <prog...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Comment-Date: Sat, 05 Jan 2019 04:09:12 +0000
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