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Posted to notifications@asterixdb.apache.org by "Michael J. Carey (JIRA)" <ji...@apache.org> on 2016/07/31 21:29:20 UTC
[jira] [Commented] (ASTERIXDB-1558) Possible minor glitch in
UNKNOWN value related predicates/handling
[ https://issues.apache.org/jira/browse/ASTERIXDB-1558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15401357#comment-15401357 ]
Michael J. Carey commented on ASTERIXDB-1558:
---------------------------------------------
BTW, the semi-analogous situation for list accesses works as I would expect.
For example, [ 'a', 'b', NULL,'c' ][5] IS NULL returns FALSE (not NULL).
> Possible minor glitch in UNKNOWN value related predicates/handling
> ------------------------------------------------------------------
>
> Key: ASTERIXDB-1558
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-1558
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: AsterixDB, Translator - AQL
> Reporter: Michael J. Carey
> Assignee: Yingyi Bu
> Priority: Minor
>
> The following evaluates to TRUE:
> {
> 'project': 'AsterixDB',
> 'members': [ 'vinayakb', 'dtabass', 'chenli', 'tsotras' ]
> }.member IS MISSING;
> As, desirably, does:
> {
> 'project': 'AsterixDB',
> 'members': [ 'vinayakb', 'dtabass', 'chenli', 'tsotras' ]
> }.member IS UNKNOWN;
> But the following evaluates to NULL (and it seems to me that FALSE would be the proper expected result):
> {
> 'project': 'AsterixDB',
> 'members': [ 'vinayakb', 'dtabass', 'chenli', 'tsotras' ]
> }.member IS NULL;
> Of course, I could be MISSING something here, as a SQL++ newbie....
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