Question regarding FOUND

Started by Terry Lee Tuckerover 20 years ago6 messagesgeneral
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#1Terry Lee Tucker
terry@esc1.com

Greetings,

I have a question regarding the use of the FOUND variable within a plpgsql
function. I have a trigger fuction which executes a dynamic update on a
different table with the EXECUTE statement. Here's the question:

Will the FOUND variable be set, when using EXECUTE, as it would be with a
normal UPDATE statement?

Thanks for the input...

#2Michael Fuhr
mike@fuhr.org
In reply to: Terry Lee Tucker (#1)
Re: Question regarding FOUND

On Fri, Sep 02, 2005 at 08:51:41AM -0400, Terry Lee Tucker wrote:

Will the FOUND variable be set, when using EXECUTE, as it would be with a
normal UPDATE statement?

What happened when you tried it?

--
Michael Fuhr

#3Terry Lee Tucker
terry@esc1.com
In reply to: Michael Fuhr (#2)
Re: Question regarding FOUND

I haven't tried it. It's a complicated trigger function with updates to other
tables that are NOT dynamic in nature. If the EXECUTE statement doesn't set
the FOUND variable, then I will be reading the result from a previous
operation. I thought maybe somebody would know this already.

On Friday 02 September 2005 09:14 am, Michael Fuhr saith:

Show quoted text

On Fri, Sep 02, 2005 at 08:51:41AM -0400, Terry Lee Tucker wrote:

Will the FOUND variable be set, when using EXECUTE, as it would be with a
normal UPDATE statement?

What happened when you tried it?

--
Michael Fuhr

#4Terry Lee Tucker
terry@esc1.com
In reply to: Terry Lee Tucker (#1)
Re: Question regarding FOUND

Apparently, the FOUND variable is set to false regardless of the outcome of
the dynamic update statement. I placed a call to GET DIAGNOSTICS var =
ROW_COUNT. It returned 1. Question is, was that the result of a direct
update previously coded in the same trigger, or is that the result of the
dynamic update statement performed with EXECUTE?

On Friday 02 September 2005 08:51 am, Terry Lee Tucker saith:

Greetings,

I have a question regarding the use of the FOUND variable within a plpgsql
function. I have a trigger fuction which executes a dynamic update on a
different table with the EXECUTE statement. Here's the question:

Will the FOUND variable be set, when using EXECUTE, as it would be with a
normal UPDATE statement?

Thanks for the input...

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#5Tom Lane
tgl@sss.pgh.pa.us
In reply to: Terry Lee Tucker (#1)
Re: Question regarding FOUND

Terry Lee Tucker <terry@esc1.com> writes:

Will the FOUND variable be set, when using EXECUTE, as it would be with a
normal UPDATE statement?

The documentation is pretty specific about which plpgsql statements set
FOUND, and I don't see EXECUTE in that list ...
http://developer.postgresql.org/docs/postgres/plpgsql-statements.html#PLPGSQL-STATEMENTS-DIAGNOSTICS

regards, tom lane

#6Terry Lee Tucker
terry@esc1.com
In reply to: Tom Lane (#5)
Re: Question regarding FOUND

I looked at the documentation before I ever posted anything. I didn't know how
EXECUTE works and I actually thought the UPDATE statement itself would set
the variable.

Thanks for the reply.

On Friday 02 September 2005 10:47 am, Tom Lane saith:

Show quoted text

Terry Lee Tucker <terry@esc1.com> writes:

Will the FOUND variable be set, when using EXECUTE, as it would be with a
normal UPDATE statement?

The documentation is pretty specific about which plpgsql statements set
FOUND, and I don't see EXECUTE in that list ...
http://developer.postgresql.org/docs/postgres/plpgsql-statements.html#PLPGS
QL-STATEMENTS-DIAGNOSTICS

regards, tom lane