Hi,
I have a function that returns an SQL string as follows:
CREATE OR REPLACE FUNCTION t1() RETURNS text AS
$$
BEGIN
RETURN 'SELECT * FROM mytable';
END
$$ LANGUAGE plpgsql;
and I want to create a second function (t2) that will execute the string
returned by t1() and return the results. I thought about using RETURN QUERY
EXECUTE as documented here:
https://www.postgresql.org/docs/9.6/static/plpgsql-control-structures.html
but there's a note towards the end that says '/if a PL/pgSQL function
produces a very large result set, performance might be poor: data will be
written to disk to avoid memory exhaustion, but the function itself will not
return until the entire result set has been generated./'
Is there any other way I can achieve execution of the dynamic SQL from t1()
without having the whole result set retrieved inside the function itself?
note: My example above is simplified, my real t1() function takes some
parameters and generates SQL depending upon those parameters.
Thanks!
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