Michael J. Carey created ASTERIXDB-2909:
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             Summary: SQL++ Primer is missing a little section on UPSERT
                 Key: ASTERIXDB-2909
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2909
             Project: Apache AsterixDB
          Issue Type: Bug
    Affects Versions: 0.9.6
            Reporter: Michael J. Carey
            Assignee: Ian Maxon
             Fix For: 0.9.7


I thought we had a little UPSERT section - but it seems to be lost if we did 
(or in my imagination if we didn't).  We need one there.  In one of my 
AsterixDB PPT decks I have this example, which works:

To add a new user or modify an existing user in Gleambook.com:

{{UPSERT INTO GleambookUsers (}}
{{{"id":666,"alias":”dfrump",}}
{{ "name":"DonaldFrump",}}
{{ "nickname":"Frumpus",}}
{{ "userSince":datetime("2021-02-21T00:00:00"),}}
{{ "friendIds":\{{ }},}}
{{ "employment":[{"organizationName":"TBD",}}
{{ "startDate":date("2021-01-21")}],}}
{{ "gender":"M"}}}
{{);}}



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