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From: "Rajesh Kumar Mallah." <mallah@trade-india.com>
Organization: Infocom Network Limited.
To: "wit" <microx@hotpop.com>, pgsql-sql@postgresql.org
Subject: Re: check source of trigger
Date: Thu, 26 Sep 2002 23:43:16 +0530
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Hi,

In case you doing all this to replicate tables
conside contrib/dbmirror it does it fairly elegantly.

regds
mallah.

On Friday 20 September 2002 13:55, wit wrote:
> Hello,
>
> I have a question about trigger. I have tables with the following
> structure:
>
> create table A (
>    e_codeA char(5) default '' not null,
>    n_codeA varchar(20) default '' not null,
>    constraint A_pkey primary key ( e_codeA )
> );
>
> create table B (
>    e_codeB char(5) default '' not null,
>    e_codeA char(5) default '' not null
>       constraint e_codeA_ref references A( e_codeA )
>       on delete cascade on update cascade,
>    n_codeB varchar(20) default '' not null,
>    constraint B_pkey primary key ( e_tranB, e_codeA )
> );
>
> I have trigger and procedure on table B to capture any change and insert
> into table logB:
>     create trigger trigger_b before insert or update or delete on B for
> each row execute procedure log_change();
>
> When I update e_codeA in table A, the constrain trigger will update e_cod=
eA
> in B. My trigger, trigger_b, also was trigged and procedure will record
> change into table logB too.
> How to write a code in my db procedure to check whether the procedure was
> called by normal SQL or was called by cascade trigger.
>
> Regards,
> wit
>
>
>
>
>
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--=20
Rajesh Kumar Mallah,
Project Manager (Development)
Infocom Network Limited, New Delhi
phone: +91(11)6152172 (221) (L) ,9811255597 (M)

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