| Lists: | pgsql-hackers |
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| From: | Charles Gomes <charlesrg(at)outlook(dot)com> |
|---|---|
| To: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Whats the correct way to change trigdata->tg_relation |
| Date: | 2012-12-28 18:06:44 |
| Message-ID: | BLU002-W21A0A7B675A540F159076CAB3F0@phx.gbl |
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| Lists: | Postg토토 핫SQL : |
I'm creating a simple trigger that will be called during an insert and change the destination table.
All values are going to be preserved, just the destination table will be different.
From what I see I can't modify trigdata->tg_relation.
All examples use: return Datum(trigdata->tg_trigtuple); // however tg_relation does not belong there. I'm trying to avoind having to do a SPI_EXEC;
Should I create a new heap_tuple and call heap_insert() and then Return Datum(NULL); ? Or is there another more straight forward way of doing it? Looks like if I call heap_insert I will have to update the indexes somehow.
Thank you,
Charles
| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Charles Gomes <charlesrg(at)outlook(dot)com> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Whats the correct way to change trigdata->tg_relation |
| Date: | 2013-01-02 21:51:40 |
| Message-ID: | CA+Tgmoa6j-_fiknTUosq8vyTC6=RdW543f4ymM2jWgp=TeZBpQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Dec 28, 2012 at 1:06 PM, Charles Gomes <charlesrg(at)outlook(dot)com> wrote:
> I'm creating a simple trigger that will be called during an insert and change the destination table.
> All values are going to be preserved, just the destination table will be different.
>
> From what I see I can't modify trigdata->tg_relation.
>
> All examples use: return Datum(trigdata->tg_trigtuple); // however tg_relation does not belong there. I'm trying to avoind having to do a SPI_EXEC;
> Should I create a new heap_tuple and call heap_insert() and then Return Datum(NULL); ? Or is there another more straight forward way of doing it? Looks like if I call heap_insert I will have to update the indexes somehow.
I think you need to use SPI_EXEC. Otherwise something horrible will
probably happen.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company