Обсуждение: Can you use an array of variables in a function?
Hi all
Is it possible to use an array of variables in a PL/pgSQL function?
Here is a trivial example of what I am trying to do.
------------------------
create or replace function fmfunc(int) returns int as '
declare
_int alias for $1;
_ints int[3];
begin
_ints[1] = _int * 2;
_ints[2] = _int * 4;
_ints[3] = _int * 8;
return _ints[3];
end;'
language 'plpgsql';
------------------------
create or replace function fmfunc(int) returns int as '
declare
_int alias for $1;
_ints int[3];
begin
_ints[1] = _int * 2;
_ints[2] = _int * 4;
_ints[3] = _int * 8;
return _ints[3];
end;'
language 'plpgsql';
------------------------
SELECT fmfunc(3) runs without any errors, but it returns null.
For debugging, I added the following line before the return -
raise notice ''ints[1] = '', _ints[1];
raise notice ''ints[1] = '', _ints[1];
I then get 'syntax error at or near "["'.
Platform is 7.4.1 on Redhat 9.
TIA for any advice.
Frank Millman
Hello,
You can use arrays in PL/pgSQL without problems. But You need first
init array on not NULL value.
CREATE OR REPLACE FUNCTION foo(int) RETURNS int AS $$
DECLARE x int[] = '{}';
BEGIN x[1] := $1;
RETURN x[1];
END; $$ LANGUAGE plpgsql;
regards
Pavel
> Hi all
>
> Is it possible to use an array of variables in a PL/pgSQL function?
>
> Here is a trivial example of what I am trying to do.
>
> ------------------------
> create or replace function fmfunc(int) returns int as '
> declare
> _int alias for $1;
> _ints int[3];
> begin
> _ints[1] = _int * 2;
> _ints[2] = _int * 4;
> _ints[3] = _int * 8;
> return _ints[3];
> end;'
> language 'plpgsql';
> ------------------------
>
> SELECT fmfunc(3) runs without any errors, but it returns null.
>