Ok. I have a bit of a dilemma here. First, please consider the following function: - CREATE OR REPLACE FUNCTION recent_lab(text, labs, treatments) RETURNS float8 AS
-
$BODY$select cast(substring(lab_result from '[[:space:]]*([[:digit:].-]*)') as float)
-
from labs b
-
where $2.id = b.id and b.test = $1 and result ~ '[[:digit:]]' and b.time < $3.time and b.time > $3.time - interval '2 day'
-
order by b.time desc
-
limit 1$BODY$
-
LANGUAGE 'sql' STABLE STRICT;
In a nutshell, this function returns the most recent lab result within 2 days for a given lab test. Now my problem is that this isn't accepted as an aggregate function, and I need it to be. I've looked at the documentation for custom aggregate functions http://www.postgresql.org/docs/8.2/s...aggregate.html and to put it bluntly, I'm baffled. Can anybody provide any insight in converting my function to an aggregate?
1  2336 
bump, bump, bump, bump, bump,
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