Re: [pgAdmin4][patch]: RM #3090 pgadmin shows misleading "Query returned successfully" with incorrect SQL

From: Joao De Almeida Pereira <jdealmeidapereira(at)pivotal(dot)io>
To: Akshay Joshi <akshay(dot)joshi(at)enterprisedb(dot)com>
Cc: Dave Page <dpage(at)pgadmin(dot)org>, pgadmin-hackers <pgadmin-hackers(at)postgresql(dot)org>
Subject: Re: [pgAdmin4][patch]: RM #3090 pgadmin shows misleading "Query returned successfully" with incorrect SQL
Date: 2018-03-28 13:21:45
Message-ID: CAE+jjan=7VLF8RXJ1N+5mt1sC26nXm6bvbsg-=p4g0FJc+fWKA@mail.gmail.com
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Hi Akshay,
Thanks for the clarification, looks like there isn't much we can do then

Best Regards,
Joao

On Wed, Mar 28, 2018 at 1:35 AM Akshay Joshi <akshay(dot)joshi(at)enterprisedb(dot)com>
wrote:

> Hi Joao
>
> On Tue, Mar 27, 2018 at 6:53 PM, Joao De Almeida Pereira <
> jdealmeidapereira(at)pivotal(dot)io> wrote:
>
>> Hi Akshay,
>>
>> We were not trying to imply that your fix did not solve the problem, we
>> were trying to understand the root cause of the problem.
>>
>
> As per my understanding root cause of the problem is "exception_obj.
> diag.severity" variable was not decoded and used directly, when I debug
> the code that variable contains the encoded string, so I have just use the
> function "*self.decode_to_utf8()*" and it works. If you can see the code
> below to this fix will have all the variables decoded to utf8.
>
>>
>> 1. We were not able to reproduce the problem
>> We followed your directions in RM, removed your fix but we could not
>> reproduce the problem. So we could not make sure that the application is in
>> fact working. This maybe have been because we missed something.
>> 2. The fix does not tackle the big problem
>> From what we read on the RM the big problem is "when we throw an
>> exception the front end is displaying the query successful message". Did
>> you also understood that from the RM?
>>
> We believe this is the real problem behind the RM.
>> Were you able replicate this behavior? If so we need to address the root
>> of this.
>>
>
> Yes I understood that from RM, but as I mentioned in my previous email
> that I haven't encounter that problem while trying to reproduce this. I got
> "*Not connected to the server*..." error not the "Query returned
> successfully". This bug has been log 2 months ago, I am not sure but it may
> possible that we have fixed/change some logic because of that I have seen
> "Not connected to the server......" error instead of "Query returned
> successfully".
>
>>
>>
>> As an aside sniping bugs is fine in some situations but as a general rule
>> of thumb is a bad approach and creates a blob of code that no one can
>> manage. A situation like this look like a very promising candidate for
>> extraction/refactoring in our point of view. In which situation do you
>> normally refactor or extract code?
>>
>> Thanks
>> Joao
>>
>>
>> On Tue, Mar 27, 2018, 1:31 AM Akshay Joshi <akshay(dot)joshi(at)enterprisedb(dot)com>
>> wrote:
>>
>>> Hi Joao
>>>
>>> On Tue, Mar 27, 2018 at 12:01 AM, Joao De Almeida Pereira <
>>> jdealmeidapereira(at)pivotal(dot)io> wrote:
>>>
>>>> Hello,
>>>> We tried to reproduce the issue but we were not capable to reproduce
>>>> it.
>>>> What it is strange on the fix is that python is complaining about a
>>>> different line then the one that was fixed. Maybe this is just a Python
>>>> thing....
>>>>
>>>
>>> I have mentioned the steps in RM and I have tried it on Ubuntu 16.
>>> Python is complaining the exact line where I have fixed the logic.
>>>
>>> ex_diag_message = u"{0}: {1}".format(
>>> self.decode_to_utf8(exception_obj.diag.severity), # exception_obj.diag.severity is not decoded before my fix.
>>> self.decode_to_utf8(exception_obj.diag.message_primary)
>>> )
>>>
>>>
>>>
>>>>
>>>> I assume that the fix works, but I would love to see some tests to
>>>> ensure it is working. Another issue that looks more problematic is the fact
>>>> that, as per the Redmine issue, when an exception is thrown it sends back a
>>>> Successful Query message. If this is the case then this fix doesn't look
>>>> like it is enough to solve the problem.
>>>>
>>>
>>> Yes it works. With the latest code I didn't see Successful Query
>>> message, it is showing "Not connected to the server .....", but the stack
>>> trace is same that was mentioned in the RM.
>>>
>>>>
>>>> Thanks
>>>> Victoria & Joao
>>>>
>>>> On Mon, Mar 26, 2018 at 9:00 AM Dave Page <dpage(at)pgadmin(dot)org> wrote:
>>>>
>>>>> Thanks, applied.
>>>>>
>>>>> On Mon, Mar 26, 2018 at 11:43 AM, Akshay Joshi <
>>>>> akshay(dot)joshi(at)enterprisedb(dot)com> wrote:
>>>>>
>>>>>> Hi Hackers,
>>>>>>
>>>>>> Please find the attached patch to fix RM #3090 pgadmin shows
>>>>>> misleading "Query returned successfully" with incorrect SQL.
>>>>>>
>>>>>> --
>>>>>> *Akshay Joshi*
>>>>>>
>>>>>> *Sr. Software Architect *
>>>>>>
>>>>>>
>>>>>>
>>>>>> *Phone: +91 20-3058-9517 <+91%2020%203058%209517>Mobile: +91
>>>>>> 976-788-8246 <+91%2097678%2088246>*
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Dave Page
>>>>> Blog: http://pgsnake.blogspot.com
>>>>> Twitter: @pgsnake
>>>>>
>>>>> EnterpriseDB UK: http://www.enterprisedb.com
>>>>> The Enterprise PostgreSQL Company
>>>>>
>>>>
>>>
>>>
>>> --
>>> *Akshay Joshi*
>>>
>>> *Sr. Software Architect *
>>>
>>>
>>>
>>> *Phone: +91 20-3058-9517 <+91%2020%203058%209517>Mobile: +91
>>> 976-788-8246 <+91%2097678%2088246>*
>>>
>>
>
>
> --
> *Akshay Joshi*
>
> *Sr. Software Architect *
>
>
>
> *Phone: +91 20-3058-9517 <+91%2020%203058%209517>Mobile: +91 976-788-8246
> <+91%2097678%2088246>*
>

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