Hi,
I am using PostgreSQL 7.4 and was trying to log the time each part of a
function needs. I found a pretty helpful bit of code in the documentation:
http://www.postgresql.org/docs/7.4/static/plpgsql-expressions.html
I used the following function, called inside the another function:
CREATE or replace FUNCTION mylog_test(integer, varchar) RETURNS
timestamp AS ' DECLARE n ALIAS FOR $1; logtxt ALIAS FOR $2; curtime timestamp; BEGIN
curtime:= ''now''; --INSERT INTO logger VALUES ( nextval(''seq_log''), curtime,
substr(logtxt,0,200)); RAISE NOTICE ''TIME: %'',curtime; RETURN curtime; END;
' LANGUAGE plpgsql;
I expected, that the variable curtime gets a new time value, each time
the function is called (at least that is what I understood from the
documentation). This works fine, if I test it with
SELECT mylog_test(5, 'test');
But as soon as I call the funtion from another function (which I need)
the variable curtime does not change anymore.
Can anyone tell me why this does not work and does anyone know a
solution to this?
For test purposes here is a function called test, which does nothing
else than to call mylog_test(..) and spend some time calculating.
CREATE or replace FUNCTION test() RETURNS text AS ' DECLARE i integer; j integer; k integer; BEGIN FOR i
IN1..10 LOOP PERFORM mylog(3, ''val '' || i); FOR j IN 1..2000000 LOOP k:=j; END LOOP; END
LOOP; RETURN ''THE END''; END;
' LANGUAGE 'plpgsql';
SELECT test();
Any help is appreciated
Silke
