Re: Problems with MemoryContextSwitchTo ()

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Yessica Brinkmann <brinkmann(dot)yessica(at)gmail(dot)com>
Cc: pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: Problems with MemoryContextSwitchTo ()
Date: 2020-09-16 13:15:45
Message-ID: CAFj8pRCsKMskdk6Z7fta1=zb26eNdAJKR2+t+Z7qSspSB=oMdg@mail.gmail.com
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st 16. 9. 2020 v 15:09 odesílatel Yessica Brinkmann <
brinkmann(dot)yessica(at)gmail(dot)com> napsal:

> Well, the fact is that I have a function called get_columnnames, which in
> the second foreach, is printing the values of idxcd-> varattnnames [i] the
> null value. This is the error.

How you get this list? It is result of SPI_exec*** ?

There is SPI_finish(), that cleaning a memory used by SPI interface, and
theoretically it can clean result of previous query.

Regards

Pavel

>
> -------- Mensaje original --------
> Asunto: Re: Problems with MemoryContextSwitchTo ()
> De: Pavel Stehule
> Para: Yessica Brinkmann
> CC: pgsql-general
>
>
>
>
> st 16. 9. 2020 v 13:32 odesílatel Yessica Brinkmann <
> brinkmann(dot)yessica(at)gmail(dot)com> napsal:
>
>> Good Morning.
>> I will greatly appreciate a help please on this subject. I actually did
>> several tests already and tried a lot to fix it myself. But I am not
>> able to. And I really need to know this in order to finish my university
>> thesis. If someone can help me please.
>> Best regards,
>> Yessica Brinkmann
>>
>
> please, can you attach your code, and can you show the error message?
>
> It is hard to say what is the problem from your mail?
>
> Regards
>
> Pavel
>
>
>
>>
>> El mié., 16 sept. 2020 a las 0:42, Yessica Brinkmann (<
>> brinkmann(dot)yessica(at)gmail(dot)com>) escribió:
>>
>>>
>>>
>>> Hello.
>>> I think several of you will already remember me. I'm the one with the
>>> IndexAdviser topic. Only that I changed my email address.
>>> As you may recall, I am doing my thesis on the subject of IndexAdviser
>>> modifications.
>>> I really appreciate the help they have given me in various Postgresql
>>> groups.
>>> Well, I was really nearing the end of the programming part of the
>>> thesis, when I had a problem to be able to compile my program in a moment,
>>> and by accident some lines of source code were moved.
>>> And for this reason, I think I have problems again with the context
>>> switch issue, since at some point my context switch stopped working for me,
>>> I think because of the issue that some lines of source code were moved.
>>> Well, the fact is that I have a function called get_columnnames, which
>>> in the second foreach, is printing the values of idxcd-> varattnnames [i]
>>> the null value.
>>> This second foreach, I only do it to test if the data is really saved
>>> well and if I can recover it properly.
>>> And since the data is not retrieved properly, or is not saved properly,
>>> in the following functions of my program, the value of idxcd-> varattnnames
>>> [i] continues to appear as null.
>>> I will appreciate a lot please help, if you can tell me please why the
>>> function prints null in the values of idxcd-> varattnnames [i], in the
>>> second foreach, if it is due to an error in the context switch, or why it
>>> could be .
>>>
>>> I send my function as an attachment.
>>>
>>>
>>> Best regards,
>>> Yessica Brinkmann.
>>>
>>

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