[jira] [Created] (ASTERIXDB-1288) For a join, computation in the inner branch is not properly handled.

["Taewoo Kim (JIRA)" <ji...@apache.org>]

Taewoo Kim created ASTERIXDB-1288:
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             Summary: For a join, computation in the inner branch is not properly handled.
                 Key: ASTERIXDB-1288
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1288
             Project: Apache AsterixDB
          Issue Type: Bug
            Reporter: Taewoo Kim
            Assignee: Taewoo Kim


If there is a computation in the inner branch, currently the optimizer cannot consider that into consideration. For example, for the following query, if we want to do a correct index-search, "$t1.countA - 20" instead of "$t1.countA" should be provided into a B+Tree index on $t2.countB. However, this assignment will be applied after any index search transformation (SIdx -> Sort -> PIdx -> then, assign -> select) and this generates false results.

for $t1 in dataset('TweetMessages')
for $t2 in dataset('TweetMessages')
let $c := $t2.countB + 20
where $t1.countA /* +indexnl */= $c
order by $t2.tweetid
return {"tweetid2": $t2.tweetid, "count2":$t2.countB};



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