Re: Out of memory error

Thanks Tom. However I could not find any solution to achieve the given
requirement. I have to take all values in the temp table and assign it to
an array variable to pass it to the audit procedure as shown below. Can you
please advise ?

CREATE OR REPLACE FUNCTION call_insert_info(

) RETURNS void AS $$
DECLARE
v_message r_log_message[];
OLDVALUE1 varchar(4000);
BEGIN
drop table if exists changedinfo
create temp table changedinfo(colName varchar(100), oldValue
varchar(4000), newValue varchar(4000));
insert into changed infot select 'empName', OLD.empName,
NEW.empName from employee;
insert into changed infot select 'location', OLD.location,
NEW.location from employee;

v_message:= array(select '(' || columname || ',' || oldvalue || ',' ||
newvalue ||')' from changedinfo);
perform insert_info(v_message);
raise notice '%',v_message;
END;
$$ LANGUAGE plpgsql;

Regards,
AD.

On Wed, Nov 24, 2021 at 11:22 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> aditya desai <admad123(at)gmail(dot)com> writes:
> > In a trigger function I am creating a temp table . When an update on a
> > table is executed for say 10k rows. I get the below error.
>
> > ERROR: out of shared memory
> > HINT:You might need to increase max_locks_per_transaction
> > CONTEXT: SQL Statement "created temp table changedinfo(colName
> > varchar(100), oldValue varchar(4000), newValue varchar(4000)
>
> [ raised eyebrow ... ] If you are concerned about performance,
> I'd start by not creating a temp table per row of the outer update.
> That's costing probably 100x to 1000x as much as the row update itself.
>
> regards, tom lane
>