marcelo <marcelo.nico...@gmail.com> writes:
> What was wrong in the first approach?

plpgsql's "SELECT INTO" expects a one-for-one match between the output
columns of the SELECT and the columns of the INTO destination.  So I'd
expect something like this to work:

DECLARE
  ranger billnumberrange%ROWTYPE;
BEGIN
 SELECT * FROM billnumberrange WHERE ... INTO ranger;

Your example clearly wasn't selecting all the columns, and it
wasn't clear whether you paid any attention to column ordering;
but both of those matter.

                        regards, tom lane

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