Re: UPDATE/DELETE XXX WHERE CURRENT OF cursor_name

Gavin Sherry wrote:
> On Mon, 24 Jul 2006, Golden Liu wrote:
>
>> begin;
>> declare foo cursor for select * from bar for update;
>> fetch foo;
>> update bar set abc='def' where current of foo;
>> fetch foo;
>> delete from bar where current of foo;
>> commit;

> No one has stepped up to do this for 8.2 so unfortunately you will most
> likely not see this within the next year or so :-(.

Couldn't this be emulated by doing
begin;
declare foo cursor for select * from bar for update;
fetch foo into v_foo ;
update bar set abc='def' where ctid = v_foo.ctid;
fetch foo into v_foo ;
delete from bar where ctid = v_foo.ctid;
commit;

Or could a concurrent vacuum run lead to the wrong
rows being updated/deleted?

greetings, Florian Pflug