Re: Stable function Repeatedly Called

> However, when this is in rule, function f1 is called repeatedly again.

For example,

create table tt1 (c1 text,c2 text);
create table tt2 (c1 text,c2 text);
insert into tt1 values('a','aa');
insert into tt1 values('b','bb');
insert into tt1 values('c','cc');
insert into tt2 values('x','a');
insert into tt2 values('y','b');

CREATE OR REPLACE FUNCTION f1(TEXT) RETURNS TEXT AS'
DECLARE
MyNumber TEXT;
BEGIN
SELECT c2 INTO MyNumber FROM tt2 WHERE c1 = $1;
RAISE NOTICE ''%'',MyNumber; --for debug
RETURN MyNumber;
END' LANGUAGE 'plpgsql' STABLE;

CREATE RULE MyRule AS ON INSERT TO AnyTable DO update tt1 set c2='ABC' WHERE c1=(select f1('x'));

Thank you!

CN
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