Uhmm... Thanks.
So there's no way to avoid hanging QGIS while the trigger function(s) is
running. I am guessing that if I have another trigger function in a table that
is automatically populated by the first trigger, it will also be executed in
the QGIS transaction, right?
Thanks Again,
Alexandre Neto
Sent with Shortwave
<https://www.shortwave.com?utm_medium=email&utm_content=signature&utm_source=c2VuaG9yLm5ldG9AZ21haWwuY29t>
On Thu Jan 4, 2024, 11:45 AM GMT, Nicolas Ribot
<mailto:nicolas.ri...@gmail.com> wrote:
> Hello,
>
> A trigger is executed in a single transaction: "The execution of an AFTER
> trigger can be deferred to the end of the transaction, rather than the end of
> the statement, if it was defined as a constraint trigger. In all cases, a
> trigger is executed as part of the same transaction as the statement that
> triggered it, so if either the statement or the trigger causes an error, the
> effects of both will be rolled back."
> (https://www.postgresql.org/docs/16/trigger-definition.html
> <https://www.postgresql.org/docs/16/trigger-definition.html>)
>
> So QGIS has to wait for it to finish.
>
> Nicolas
>
> On Thu, 4 Jan 2024 at 11:16, Alexandre Neto via postgis-users
> <postgis-us...@lists.osgeo.org <mailto:postgis-us...@lists.osgeo.org>> wrote:
>> Sorry for the cross posting.
>>
>> I have a table with the following trigger
>>
>> CREATE TRIGGER tr_base_cont_trocos_ai AFTER
>> INSERT OR UPDATE ON base.cont_troco
>> FOR EACH STATEMENT
>> EXECUTE FUNCTION tr_gerar_outputs();
>>
>> Now, the tr_gerar_outputs() takes some time to process, as it generates new
>> tables and updates a few materialized views.
>>
>> In QGIS, when I add or update one or more features and press save, I would
>> expect it to be immediate, but it seems that QGIS hangs waiting for the
>> function to finish before considering the save operation complete. If the
>> function fails, it even prevent the feature to be commit.
>>
>> Is this expected for a AFTER INSERT OR UPDATE trigger? Shouldn't PostgreSQL
>> commit the changes, inform QGIS that the operation was successful and only
>> then execute the trigger?
>>
>> Thanks,
>>
>> Alexandre Neto
>>
>> Sent with Shortwave
>> <https://www.shortwave.com?utm_medium=email&utm_content=signature&utm_source=c2VuaG9yLm5ldG9AZ21haWwuY29t>
>> _______________________________________________
>> postgis-users mailing list
>> postgis-us...@lists.osgeo.org <mailto:postgis-us...@lists.osgeo.org>
>> https://lists.osgeo.org/mailman/listinfo/postgis-users
>> <https://lists.osgeo.org/mailman/listinfo/postgis-users>
_______________________________________________
QGIS-Developer mailing list
QGIS-Developer@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
