Csaba Ringhofer has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/13190 )

Change subject: IMPALA-8409: Fix row-size for STRING columns with unknown stats
......................................................................


Patch Set 2:

(3 comments)

http://gerrit.cloudera.org:8080/#/c/13190/2/fe/src/test/java/org/apache/impala/catalog/CatalogTest.java
File fe/src/test/java/org/apache/impala/catalog/CatalogTest.java:

http://gerrit.cloudera.org:8080/#/c/13190/2/fe/src/test/java/org/apache/impala/catalog/CatalogTest.java@469
PS2, Line 469:   // Note that this test used to be flaky, so it was removed (6 
years ago). I added it
> Yeah I think we'd have noticed if stats were disappearing in our Jenkin's r
Done


http://gerrit.cloudera.org:8080/#/c/13190/2/tests/metadata/test_explain.py
File tests/metadata/test_explain.py:

http://gerrit.cloudera.org:8080/#/c/13190/2/tests/metadata/test_explain.py@141
PS2, Line 141:   def test_explain_row_size_estimates(self, vector, 
unique_database):
> My initial reaction was that this should be a planner test. I can see, thou
I agree that it would be better to check this among planner tests - if the 
planner acts in an unexpected way, then it is the best to catch it in planner 
tests. My laziness says that it has a nice place near the similar 
test_explain_validate_cardinality_estimates.

There was a benefit in doing it here - it made me realize that 
test_explain_validate_cardinality_estimates is totally broken, it accepts any 
cardinality as its regexp no longer matches the lines it should.


http://gerrit.cloudera.org:8080/#/c/13190/2/tests/metadata/test_explain.py@142
PS2, Line 142:     # Tests that EXPLAIN returns the expected row sizes with and 
without stats.
> Should use a """ """ docstring for method comments
Done



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I866acf10b2c011a735dee019f4bc29358f2ec4e5
Gerrit-Change-Number: 13190
Gerrit-PatchSet: 2
Gerrit-Owner: Csaba Ringhofer <csringho...@cloudera.com>
Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Comment-Date: Thu, 02 May 2019 14:31:46 +0000
Gerrit-HasComments: Yes

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