[jira] [Commented] (ASTERIXDB-1860) Inconsistent behavior w.r.t. connecting/disconnecting feed to a non-existing dataset

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

    [ https://issues.apache.org/jira/browse/ASTERIXDB-1860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15942412#comment-15942412 ] 

Till commented on ASTERIXDB-1860:
---------------------------------

[~idleft], [~amoudi]: It seems surprising, that the connect feed statement would not check for the existence of the dataset. Is this just a bug or is there a feature behind this behavior?

> Inconsistent behavior w.r.t. connecting/disconnecting feed to a non-existing dataset
> ------------------------------------------------------------------------------------
>
>                 Key: ASTERIXDB-1860
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1860
>             Project: Apache AsterixDB
>          Issue Type: Bug
>          Components: Feeds
>            Reporter: Chen Luo
>            Priority: Minor
>
> Connecting a feed to a non-existing dataset (whose name is 'unknown_dataset') is successful, and the system shows the message: 
> {code}Success: Query Complete.{code}
> However, disconnecting this feed to this dataset is rejected with error message: {code}Unknown target dataset :unknown_dataset [CompilationException].{code}
> Then, connecting this feed to the dataset again gives: {code}FeedTweetFeed is already connected dataset unknown_dataset [AlgebricksException].{code}
> Thus, it seems once a feed is connected to a non-existing dataset, it cannot be disconnected from it.
> Steps to reproduce:
> # create a feed named Feed1;
> # connect Feed1 to a non-existing dataset, e.g., unknown_dataset:
> {code}
> connect feed Feed1 to dataset unknown_dataset;
> {code}
> Now Feed1 is successfully connected to unknown_dataset.
> # disconnect Feed1 from unknown_dataset:
> {code}
> disconnect feed Feed1 from dataset unknown_dataset;
> {code}
> This command is rejected because unknown_dataset is not existing.
> # connect Feed1 to unknown_dataset again:
> {code}
> connect feed Feed1 to dataset unknown_dataset;
> {code}
> The system shows Feed1 is already connected to unknown_dataset.



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