Yingyi Bu has posted comments on this change.

Change subject: Ensure Metadata locks are acquired for SqlPP queries
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Patch Set 2:

In fact, for correctness, we have to do it in the right way.

The following queries are valid queries that you can run from the Web UI:
Q1: Metadata.`Dataset`;

Q2: array_count(Metadata.`Dataset`);

There are many fronts that can be a "dataset"...   Therefore, we have to 
acquire locks upon recognizing datasets and dataverses.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I5f468599897a37cbcb12d8577d072f340f0d949c
Gerrit-PatchSet: 2
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: abdullah alamoudi <[email protected]>
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Till Westmann <[email protected]>
Gerrit-Reviewer: Yingyi Bu <[email protected]>
Gerrit-Reviewer: abdullah alamoudi <[email protected]>
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