Re: Query tool data grid - Infinite scroll vs Pagination

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From: Dave Page <[email protected]>
To: Akshay Joshi <[email protected]>
Cc: Aditya Toshniwal <[email protected]>
Cc: pgadmin-hackers <[email protected]>
Subject: Re: Query tool data grid - Infinite scroll vs Pagination
Date: Thu, 8 Aug 2024 14:00:40 +0100
Message-ID: <CA+OCxoxXg2q_H9ZS-7Ae8x65uH5hLTKGtQgqq9oLbmAJCpQWKA@mail.gmail.com> (raw)
In-Reply-To: <CANxoLDexeQwhsOrsV83WjwmU8znr+yQrLYriFgqRTVygJbWrPw@mail.gmail.com>
References: <CAM9w-_mJkHpqE2BSdBsLqOVO4ARaWPDXZGYb5Hn3eMh+sDcOrg@mail.gmail.com>
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On Thu, 8 Aug 2024 at 13:53, Akshay Joshi <[email protected]>
wrote:

>
>
> On Thu, Aug 8, 2024 at 6:17 PM Aditya Toshniwal <
> [email protected]> wrote:
>
>> Hello Everyone,
>>
>> Just want to share the progress on this. Attached is a quick demo. It is
>> not complete yet, but I just want to make sure I'm in the right direction.
>>
>> https://drive.google.com/file/d/1B7DuD2Wx2SABGPEEjc8o4RwYcNgu1t_s/view?usp=sharing
>>
>>     Excellent, I like the new design.
>

As do I. I do wonder if the ability to enter numbers for the page and the
from/to rows is necessary. I guess it doesn't hurt.


>
>
>> On Sat, Aug 3, 2024 at 7:39 PM Gus Spier <[email protected]> wrote:
>>
>>> I like the idea of gmail behavior.
>>>
>>> Regards,
>>>
>>> Gus Spier
>>>
>>> On Sat, Aug 3, 2024 at 5:45 AM Edson Richter <[email protected]>
>>> wrote:
>>>
>>>> Love it!
>>>> I believe the Gmail behavior is a good approach.
>>>>
>>>> Regards,
>>>>
>>>> ER
>>>>
>>>>
>>>> Obter o Outlook para Android <https://aka.ms/AAb9ysg;
>>>> ------------------------------
>>>> *From:* Aditya Toshniwal <[email protected]>
>>>> *Sent:* Friday, August 2, 2024 3:53:33 AM
>>>> *To:* pgadmin-hackers <[email protected]>
>>>> *Cc:* Usman Khan <[email protected]>; pgAdmin Support <
>>>> [email protected]>; Dave Page <[email protected]>; Dave
>>>> Caughey <[email protected]>
>>>> *Subject:* Re: Query tool data grid - Infinite scroll vs Pagination
>>>>
>>>>
>>>> Hi Hackers,
>>>>
>>>>
>>>> I have come up with the following design, which allows:
>>>>
>>>> 1. Adjust the range of rows visible, aka Window.
>>>>
>>>> 2. Jump to a page number directly based on rows window size.
>>>>
>>>> 3. Pagination buttons to move forward and backward.
>>>>
>>>>
>>>> My question is, how should "select all" behave now? Previously we used
>>>> to fetch all the rows when select all was clicked which actually slowed
>>>> down as it took time for large data.
>>>>
>>>> Maybe add a new button to virtually "Select All Rows".
>>>>
>>>>
>>>> [image: image (15).png]
>>>>
>>>>
>>>>
>>>> On Tue, Jul 2, 2024 at 6:16 PM Aditya Toshniwal <
>>>> [email protected]> wrote:
>>>>
>>>> Thank you Dave and others for your valuable feedback.
>>>> We'll try to achieve what is best for the users.
>>>>
>>>> On Tue, Jul 2, 2024 at 5:46 PM Dave Caughey <[email protected]> wrote:
>>>>
>>>> I think there's a nice blend between pagination and infinite scrolling.
>>>>
>>>> The problem with the *current *infinite scrolling implementation is
>>>> that the scroll baris scaled to the number of *rendered* rows, so as you
>>>> scroll down (which renders another bunch of records), it keeps
>>>> rescaling the scrollbar, so to get the next "page", you have to continually
>>>> move to the scrollbar (as Aditya says, "*Many users who want access in
>>>> between rows or last row struggle to do it as the user has to scroll and
>>>> scroll.*")
>>>>
>>>> If instead the scrollbar were scaled to the total number of rows,
>>>> (e.g., 1000 rather than the initial 25 rows that were rendered), then
>>>> clicking (say) in the lower third of the scrollbar would would do enough
>>>> fetching/rendering to display rows 601-625 (or such).  Problem solved.
>>>>
>>>> Alternatively (or additionally), provide a "jump to row..." button
>>>> (similar to what Usman is suggesting re pagination) that gives the user
>>>> control to see a specific bunch of records quickly.
>>>>
>>>> But if the issue is that people don't like infinite scrolling because
>>>> "the user has to scroll and scroll", then fix that specific UE issue, and
>>>> people will be happy.
>>>>
>>>> The concern I have with a paginated solution is if the page represents
>>>> the maximum number of rows rendered in the results pane, at any one time.
>>>> Assume I can see 25 rows in the result pane.  I.e., you show rows 1-25 for
>>>> the first page, then you *only *show rows 26-50 for the second page,
>>>> then *only *show rows 27-50, etc. But when there is a cluster of
>>>> records of interest between rows 640 and 655, then those records of
>>>> interest are going to be spread between pages 25 and 26, and will
>>>> constantly require flipping back and forth between pages.  This would be
>>>> possibly worse UE than the current "user has to scroll and scroll" issue.
>>>> On the other hand, if your pagination solution includes letting someone
>>>> nudge the rendered rows up or down a bit so that I can see rows 640-655 all
>>>> at once (e.g., there's a field where I can type in that the current page
>>>> should start at row 635, so I can see rows 640-655 all together), then I'm
>>>> fine with that.
>>>>
>>>> However, if ultimately you decide to toss out infinite scrolling for
>>>> pagination, then please make the (default?) page size be the number of rows
>>>> you can actually see in the result pane, rather than some arbitrary number
>>>> (e.g., 50).  Having the page size equal to the number of rendered rows
>>>> means I can quickly step through the pages and hopefully notice a record of
>>>> interest.... If the page size is larger than the number of rendered rows,
>>>> then as I step to the next page I *still *have to scroll down to see
>>>> the last few rows, then step to the next page, then scroll down again,
>>>> I.e., that would be hideous UE!
>>>>
>>>> So my vote preferences are:
>>>>
>>>> First choice: keep infinite scrolling, but simply fix the scrollbar
>>>> scaling and/or give the user the means to quickly jump down by a page or to
>>>> a specific page
>>>> Second choice: use pagination, but *only *if there's the ability to
>>>> see a specific chunk of records on a single page (rather than spread across
>>>> two), and make the pagination size default to the number of records visible
>>>> given the height of the result pane
>>>>
>>>> Cheers,
>>>> Dave
>>>>
>>>>
>>>> On Mon, 1 Jul 2024 at 04:35, Usman Khan <[email protected]> wrote:
>>>>
>>>> Hi Aditya
>>>> I vote for pagination, it would really be helpful for end users.
>>>> In addition to giving the user the ability to set page size, if he can
>>>> also select or enter what page he can jump to say 501, 990 etc it would be
>>>> helpful.
>>>>
>>>> On Fri, Jun 28, 2024 at 3:44 PM Aditya Toshniwal <
>>>> [email protected]> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Unfortunately, there were only 3 responses to this.
>>>> In that case, we will discuss internally and decide what to do.
>>>>
>>>> On Thu, Jun 20, 2024 at 2:46 PM Aditya Toshniwal <
>>>> [email protected]> wrote:
>>>>
>>>> Hi Everyone,
>>>>
>>>> Request you to share your opinion on this and respond on:
>>>>
>>>> https://docs.google.com/forms/d/e/1FAIpQLSdfJhNK8qXSe9mKcubZa8jjjYl0hiZVxhv6GGJo8WJcYc27ug/viewform?...
>>>>
>>>> On Thu, Jun 20, 2024 at 1:36 PM Dave Page <[email protected]> wrote:
>>>>
>>>> Hi
>>>>
>>>> On Wed, 19 Jun 2024 at 13:42, Aditya Toshniwal <
>>>> [email protected]> wrote:
>>>>
>>>> Hi Hackers,
>>>>
>>>> Query tool data grid currently pulls the data on load basis in batches.
>>>> For example, it will initially load only 1000 rows and once a user scrolls
>>>> to the 1000th row, it will fetch the next batch of 1000.
>>>> Many users who want access in between rows or last row struggle to do
>>>> it as the user has to scroll and scroll. If someone grabs the scroller and
>>>> pulls it down still it will be a good UX and the scrollbar may jump. One
>>>> reported here - https://github.com/pgadmin-org/pgadmin4/issues/1780
>>>> One more aspect to this is the in memory data of the query tool which
>>>> keep on increasing on each scroll, it affects the performance.
>>>>
>>>> I propose we should use pagination instead of infinite scroll with the
>>>> following advantages:
>>>> 1. Users can jump to any page they want.
>>>> 2. Users can change the page size on the grid directly.
>>>> 3. Memory will be used only for visible rows so performance improvement.
>>>> 4. Predictable UI, no jumping scrollbars.
>>>>
>>>> Let me know what you think.
>>>>
>>>>
>>>>
>>>> I think there are definite benefits, but there is the downside of
>>>> having to scroll and click to browse results. Personally I'm fine with
>>>> that, but I think you should probably poll pgadmin-support for opinions
>>>> from more users.
>>>>
>>>> --
>>>> Dave Page
>>>> pgAdmin: https://www.pgadmin.org
>>>> PostgreSQL: https://www.postgresql.org
>>>> EDB: https://www.enterprisedb.com
>>>>
>>>>
>>>>
>>>> --
>>>> Thanks,
>>>> Aditya Toshniwal
>>>> pgAdmin Hacker | Sr. Software Architect | *enterprisedb.com*
>>>> <https://www.enterprisedb.com/;
>>>> "Don't Complain about Heat, Plant a TREE"
>>>>
>>>>
>>>>
>>>> --
>>>> Thanks,
>>>> Aditya Toshniwal
>>>> pgAdmin Hacker | Sr. Software Architect | *enterprisedb.com*
>>>> <https://www.enterprisedb.com/;
>>>> "Don't Complain about Heat, Plant a TREE"
>>>>
>>>>
>>>>
>>>> --
>>>> Thanks,
>>>> Aditya Toshniwal
>>>> pgAdmin Hacker | Sr. Software Architect | *enterprisedb.com*
>>>> <https://www.enterprisedb.com/;
>>>> "Don't Complain about Heat, Plant a TREE"
>>>>
>>>>
>>>>
>>>> --
>>>> Thanks,
>>>> Aditya Toshniwal
>>>> pgAdmin Hacker | Sr. Software Architect | *enterprisedb.com*
>>>> <https://www.enterprisedb.com/;
>>>> "Don't Complain about Heat, Plant a TREE"
>>>>
>>>
>>
>> --
>> Thanks,
>> Aditya Toshniwal
>> pgAdmin Hacker | Sr. Software Architect | *enterprisedb.com*
>> <https://www.enterprisedb.com/;
>> "Don't Complain about Heat, Plant a TREE"
>>
>

-- 
Dave Page
pgAdmin: https://www.pgadmin.org
PostgreSQL: https://www.postgresql.org
EDB: https://www.enterprisedb.com

PGDay UK 2024, 11th September, London: https://2024.pgday.uk/


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