Need a moving Hyrax when Query is being processed on Web UI

[GoogleCodeExporter]

What steps will reproduce the problem?

Start asterix from managix and submit a query for execution that would take a 
few seconds, like 5-6 seconds or more. Currently there is no information 
provided on Web UI to users during query execution, we may want to print a 
message on the UI during query execution that, "Your statement (DDL/DML) is 
being processed" or another better message.

Also, previous output from past sessions must be cleared from Web UI. Meaning, 
the output and messages should be cleared from previous session of Web UI, that 
is because queries that take longer for execution still display information 
from previous session.

Please ensure that once user clicks on Clear Query button the entire page is 
refreshed, that way we can get rid of information from previous session.

Original issue reported on code.google.com by khfaraaz82 on 8 Jun 2013 at 9:51

[GoogleCodeExporter]

I can take care of this one :) I have a good idea for it.

Original comment by genia.li...@gmail.com on 9 Jun 2013 at 4:25

[GoogleCodeExporter]

A question: right now the behavior is as follows: 
1. I run a query that takes on average 10 seconds (I have a dataset I can load 
for this).
2. While that is running, I run another query, e.g., an erroneous one such as 
> foo = "1"
3. Output box displays an error. 
4. Moments later, output box displays the output of the longer query. 

Do we want to display the earlier one? Do we want to display the later one? 
Should a new query override an existing query? I can implement any of these, 
but I am not sure of what is the Asterix UI desired behavior for queries that 
take a while and what should happen in between. 

Original comment by genia.li...@gmail.com on 9 Jun 2013 at 8:59

• Changed state: Accepted

[GoogleCodeExporter]

This one is ready to be merged, and is relevant to #526 
https://code.google.com/p/asterixdb/issues/detail?id=526

In particular, it fixes the UI side of canceling, but not the backend side of 
it.

Original comment by genia.li...@gmail.com on 23 Jun 2013 at 7:05

• Changed state: FixedInBranch

[GoogleCodeExporter]

Does this mean that the long running job, which needed to be canceled,
would still be running as a Hyracks job even after the Cancel button is
clicked on the Web UI front end ?

Original comment by khfaraaz82 on 24 Jun 2013 at 6:27