PostgreSQL: Query has no destination for result data

Question

I am trying to fetch data from remote db by using dblink through function but getting an error \"query has no destination for result data\". I am using plpgsql language to d

Answer 1

Reason for the error you're getting is because there is no return in between your BEGIN and END for example:

    BEGIN
        update mytable set lastcodeused = to_char(cast(lastcodeused as INTEGER)+1, 'FM999999999999999999') where 
        classid = classIdVar and appid= appIdInt 
        RETURNING concat(pageUniqueCode,lastcodeused) as pageUniqueCode
        into taskcode;
        return taskcode;
    END;

Answer 2

Answer from SL2 was right, but you can write it in the short way:

CREATE OR REPLACE FUNCTION fun() RETURNS text AS $$
BEGIN
    --- ....
    RETURN(SELECT dblink_disconnect());
END
$$ LANGUAGE plpgsql;

Answer 3

The stored procedure won't just return the result of the last SELECT. You need to actually return the value:

CREATE OR REPLACE FUNCTION fun() RETURNS text AS $$
BEGIN
    --- ....
    RETURN(SELECT dblink_disconnect());
END
$$ LANGUAGE plpgsql;

You're getting the error because Postgres expects the function to return something of type text, but your function doesn't return anything.

Answer 4

Use a plain SQL function instead of PL/PgSQL, or use SELECT INTO and ordinary RETURN.