Luo Chen has posted comments on this change.

Change subject: [ASTERIXDB-2344] LIMIT pushdown for primary index
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Patch Set 17:

> LGTM. I only have a few minor comments.
 > 
 > #1. Do we want to keep the optimizer tests? or just use runtime
 > test framework? It looks like you are using the runtime test to
 > generate the plan and check it without introducing the optimizer
 > tests.
 > 
 > #2. Can you add a description to each test? What are they supposed
 > to check?
 > 
 > #3. Before declaring outputLimit, selectCondition, and
 > tupleFilterFactory variables in each class, can we add a simple
 > comment about them? What's the purpose of them?

1. I think optimizer tests have already been removed. It seems optimizer tests 
cannot print out detailed variable information, which is needed to test this 
feature. So I just use "explain" query for this purpose.

2. Done.

3. Done.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I824fcad79995325e12a1a81d629160025294b915
Gerrit-PatchSet: 17
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: Luo Chen <[email protected]>
Gerrit-Reviewer: Anon. E. Moose #1000171
Gerrit-Reviewer: Dmitry Lychagin <[email protected]>
Gerrit-Reviewer: Ian Maxon <[email protected]>
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Luo Chen <[email protected]>
Gerrit-Reviewer: Taewoo Kim (please use [email protected]) <[email protected]>
Gerrit-Reviewer: Taewoo Kim <[email protected]>
Gerrit-Reviewer: abdullah alamoudi <[email protected]>
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