Re: Declare variable from other variable

Thanks, it worked!

By the way, what does this "**j"* mean there..? (this does not mean
multiply there?)

And what if, I would like to declare v_to_date also, so that v_to_date is
always + 1 month compared to v_date_from..?

-- This one will work, but can this be done simpler..?
v_to_date := (date_trunc('month',current_date)::date + interval '1 month' +
interval '1 month'*j)::date;

Raul

Kontakt Yasin Sari (<yasinsari81(at)googlemail(dot)com>) kirjutas kuupäeval K, 5.
veebruar 2020 kell 14:28:

> On Wed, Feb 5, 2020 at 2:22 PM Raul Kaubi <raulkaubi(at)gmail(dot)com> wrote:
>
>>
>> DO $$
>>> DECLARE
>>> v_var integer := 1;
>>> v_from_date date;
>>> BEGIN
>>> for j in 0..v_var LOOP
>>> v_from_date := (date_trunc('month',current_date) + interval 'j
>>> month')::date;
>>> RAISE NOTICE '%', v_from_date;
>>> END LOOP;
>>> END;
>>> $$ LANGUAGE plpgsql;
>>
>>
>>> ERROR: invalid input syntax for type interval: "j month"
>>> LINE 1: ...LECT (date_trunc('month',current_date) + interval 'j
>>> month')...
>>
>>
>>
>>
> If you replace red line with this one it will work:
>
> v_from_date := (date_trunc('month',current_date) + interval '1
> month'*j)::date;
>