I need some help. I am trying to get a very simple function written to help our developers. Unfortunetly, the language we are developing in is giving us some grief over trying to do a "select to_char((current_date - inteval '1 day'),'yyyymmdd') into x". It is complaining about the use of the work interval.
Anyway, I thought, no problem, I'll just create a date increment and date decrement set of functions. However, I can not get them to work. Can someone please point out what is wrong?
CREATE OR REPLACE FUNCTION "public"."date_dec" (date, integer) RETURNS varchar AS' declare startDate alias for $1; numDays alias for $2; retDate varchar(8); begin select to_char((startDate - interval ''numDays day''),''yyyymmdd'') into retDate; return retDate; end; 'LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;
When I try to run this, it complains about numDays - "Error: Bad interval external representation 'numDays day'". Is there anyway around this? I am trying to keep the function generic so that our developers can use it to calculate any date range.
