Обсуждение: How to manipulate field in New record
Hello,
Looking for a global solution I've write e trigger function that as optional parameter (argv[0]) receive the name of a specific parameter.
My need is to get the filed from NEW and OLD record manipulate and set back the field with new value.
Problem 1: how to get and set this field
Problem 2: the field has Composit type
On Wed, Jun 07, 2023 at 02:12:58PM +0200, Lorusso Domenico wrote: > Hello, > Looking for a global solution I've write e trigger function that as > optional parameter (argv[0]) receive the name of a specific parameter. > > My need is to get the filed from NEW and OLD record manipulate and set back > the field with new value. > > Problem 1: how to get and set this field > Problem 2: the field has Composit type Do this in pl/perl, pl/python, pl/tcl or anything like this. Or use one of methods shown here: https://www.depesz.com/2021/04/21/getting-value-from-dynamic-column-in-pl-pgsql-triggers/ depesz
On 6/7/23 05:12, Lorusso Domenico wrote: > Hello, > Looking for a global solution I've write e trigger function that as > optional parameter (argv[0]) receive the name of a specific parameter. > > My need is to get the filed from NEW and OLD record manipulate and set > back the field with new value. A new row won't have the OLD RECORD. Read: https://www.postgresql.org/docs/current/plpgsql-trigger.html and look at the examples. > > Problem 1: how to get and set this field > Problem 2: the field has Composit type -- Adrian Klaver adrian.klaver@aklaver.com
yes I know, the trigger should be before insert update and delete, and the function decide what manipulate basing on TG_OP
Il giorno mer 7 giu 2023 alle ore 15:57 Adrian Klaver <adrian.klaver@aklaver.com> ha scritto:
On 6/7/23 05:12, Lorusso Domenico wrote:
> Hello,
> Looking for a global solution I've write e trigger function that as
> optional parameter (argv[0]) receive the name of a specific parameter.
>
> My need is to get the filed from NEW and OLD record manipulate and set
> back the field with new value.
A new row won't have the OLD RECORD.
Read:
https://www.postgresql.org/docs/current/plpgsql-trigger.html
and look at the examples.
>
> Problem 1: how to get and set this field
> Problem 2: the field has Composit type
--
Adrian Klaver
adrian.klaver@aklaver.com
Domenico L.
per stupire mezz'ora basta un libro di storia,
io cercai di imparare la Treccani a memoria... [F.d.A.]
per stupire mezz'ora basta un libro di storia,
io cercai di imparare la Treccani a memoria... [F.d.A.]