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From: Ian Maxon <imaxon@uci.edu>
Date: Wed, 12 Apr 2017 15:11:33 -0700
Message-ID: <CAN_YF5zQg6JxMegOGnZjoKoJ0exRcW2kSJXmGzJ8i0dKx736EQ@mail.gmail.com>
Subject: Re: When is it appropirate to add reserved words to the AQL/SQL++ Grammar?
To: dev@asterixdb.apache.org
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archived-at: Wed, 12 Apr 2017 22:12:04 -0000

Yes, more or less. I'm not sure that I would force the buffer cache,
but at least I want all of the "object" representations outside of
that to have vanished such that their state must be regenerated from
the at-rest format.

On Wed, Apr 12, 2017 at 2:41 PM, Mike Carey <dtabass@gmail.com> wrote:
> So you want to basically quiesce a dataset "all the way" - so that it's not
> open at all, and perhaps so that the buffer pool also has none of its pages
> resident?
>
>
>
> On 4/12/17 2:26 PM, Ian Maxon wrote:
>>
>> That's a little different than from what I'd like to do. Basically I
>> want to evict the dataset entirely. My alterior motive here is to test
>> the correctness of persisted storage artifacts as right now in many
>> cases this is not covered. It has been a recurring theme in many bugs
>> that there is some stored artifact on disk that is written incorrectly
>> but never read during tests, because often the tests simply never
>> encounter the path in which this would occur (restart,eviction, etc.)
>>
>> On Wed, Apr 12, 2017 at 1:46 PM, Ildar Absalyamov
>> <ildar.absalyamov@gmail.com> wrote:
>>>
>>> Ian,
>>>
>>> There is an existing API, which does exactly that.
>>> https://github.com/apache/asterixdb/blob/master/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/ConnectorApiServlet.java#L123
>>> <https://github.com/apache/asterixdb/blob/master/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/ConnectorApiServlet.java#L123>
>>> I have been successfully using it in my experiments.
>>>
>>>> On Apr 12, 2017, at 13:41, Ian Maxon <imaxon@uci.edu> wrote:
>>>>
>>>> Hey all,
>>>> I was working on a patch that would add a 'flush dataset' DDL command
>>>> (mainly for testing), and of course this would require adding 'flush'
>>>> as a new reserved word. What is the consensus on when this would be
>>>> permitted at this point? There are other ways to do this, of course, I
>>>> could expose this functionality through a separate API, and I am not
>>>> really partial to one solution or the other.
>>>>
>>>> Thanks,
>>>> - Ian
>>>
>>> Best regards,
>>> Ildar
>>>
>