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

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

     [ https://issues.apache.org/jira/browse/ASTERIXDB-1288?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till updated ASTERIXDB-1288:
----------------------------
    Labels: soon  (was: )

> 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
>              Labels: soon
>
> 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.
> {noformat}
> 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};
> {noformat}



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