Dmitry Lychagin has posted comments on this change.

Change subject: [ASTERIXDB-2402][COMP] Allow AND for IsMissing in Groupby
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Patch Set 2:

(2 comments)

https://asterix-gerrit.ics.uci.edu/#/c/2735/2/asterixdb/asterix-algebra/src/main/java/org/apache/asterix/optimizer/rules/am/AccessMethodUtils.java
File 
asterixdb/asterix-algebra/src/main/java/org/apache/asterix/optimizer/rules/am/AccessMethodUtils.java:

Line 1505:         //find IS_MISSING function of which argument has the 
nullPlaceholder variable in the nested plan of groupby.
Do we check that the variable inside is_missing() is the one we need? I could 
not find it in the previous code and the current code does not seem to do it 
either. In your comment you say 
"and(not(is-missing($VAR1)),not(is-missing($VAR2)))". What if we're looking for 
$VAR2 instead of $VAR1? Can you double check what happens this case while 
looking into this issue.


https://asterix-gerrit.ics.uci.edu/#/c/2735/2/asterixdb/asterix-app/src/test/resources/optimizerts/queries/ASTERIXDB-2402.sqlpp
File 
asterixdb/asterix-app/src/test/resources/optimizerts/queries/ASTERIXDB-2402.sqlpp:

Line 102: insert into channels.EmergenciesNearMeChannelResults as a (
can we simplify the statement here?  Is the insert necessary or a simpler query 
could reproduce this issue?


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Gerrit-MessageType: comment
Gerrit-Change-Id: I9547fba5e4ba02226b5b2c2504080b091d3b8d5e
Gerrit-PatchSet: 2
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: Steven Jacobs <[email protected]>
Gerrit-Reviewer: Anon. E. Moose #1000171
Gerrit-Reviewer: Dmitry Lychagin <[email protected]>
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Xikui Wang <[email protected]>
Gerrit-HasComments: Yes

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