Re: Parameter passing in trigger function write in C

On 04/27/2018 07:25 AM, a wrote:
> Yep, I wanna pass the brief reason of manipulating(update, insert or

https://www.postgresql.org/docs/10/static/trigger-interface.html
"
tg_event

Describes the event for which the function is called. You can use
the following macros to examine tg_event

...

TRIGGER_FIRED_BY_UPDATE(tg_event)

Returns true if the trigger was fired by an UPDATE command.
"

> delete), name and password of the manipulator (This might be done by
> database itself).

As for user:

https://www.postgresql.org/docs/10/static/functions-info.html

"current_user name user name of current execution context"

Password?:

https://www.postgresql.org/docs/10/static/view-pg-shadow.html

Though if you are using password encryption it will be encrypted.

>
>
> ------------------ Original ------------------
> *From:* "Adrian Klaver";
> *Date:* Friday, Apr 27, 2018 10:16 PM
> *To:* "a"<372660931(at)qq(dot)com>; "pgsql-general";
> *Subject:* Re: Parameter passing in trigger function write in C
>
> On 04/26/2018 06:48 PM, a wrote:
> > hey thanks mate, I have red that. But the actual data retirement seems
> > to be combination of that and the SPI_get* functions. I'm still testing
> > on it. By the way, if I can pass parameters that is out of the scope of
> > sql statement??
>
>
> Can you be more specific about what parameters you are looking to pass in?
>
> >
> >
> > ------------------ Original ------------------
> > *From:* "Adrian Klaver";
> > *Date:* Friday, Apr 27, 2018 9:36 AM
> > *To:* "a"<372660931(at)qq(dot)com <mailto:372660931(at)qq(dot)com>>; "pgsql-general";
> > *Subject:* Re: Parameter passing in trigger function write in C
> >
> > On 04/26/2018 06:13 PM, a wrote:
> >  > Hey everyone:
> >  >
> >  > I was request to write a trigger that perform the following function:
> >  >
> >  > 1, The trigger will be set to exam all statement that will result
> change
> >  > of datas
> >  >
> >  > 2, The trigger will exam three information other than the data updated
> >  > or inserted: user name, password and reasons of change
> >  >
> >  > 3, It will record down, in some format, the time and content of the
> > change.
> >  >
> >  > Therefore, I would need some way of passing parameters into the
> trigger
> >  > function. Can anyone give me some instructions on how to do it or,
> if it
> >  > is possible??
> >
> > https://www.postgresql.org/docs/10/static/trigger-interface.html
> <https://www.postgresql.org/docs/10/static/trigger-interface.html>
> > <https://www.postgresql.org/docs/10/static/trigger-interface.html>
> <https://www.postgresql.org/docs/10/static/trigger-interface.html>>;
> >
> >
> > --
> > Adrian Klaver
> > adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
> <mailto:adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>>
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com