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Home -> Community -> Mailing Lists -> Oracle-L -> Re: a pl/sql question
I don't know if this will improve performance but here is an example, use
outer join.
select C.TRC_CUENTA,nvl(A.CTS_NOMBRE,B.CTS_NOMBRE) name
from transace C,
( select CTS_CUENTA,CTS_NOMBRE from cuentaE where cts_TRATAMIENTO = 'IN') A,
( select CTS_CUENTA,CTS_NOMBRE from cuentaE where cts_TRATAMIENTO = 'EG') B
WHERE C.TRC_CUENTA = A.CTS_CUENTA(+) AND C.TRC_CUENTA =B.CTS_CUENTA(+) If you could create a materialized view from this I think this could really help.
If you see when there is records in the second query it will return null
Juan Carlos Reyes Pacheco
OCP
Database 9.2 Standard Edition
----- Original Message -----
From: "Guang Mei" <gmei_at_incyte.com>
To: "Oracle-L-freelists" <oracle-l_at_freelists.org>
Sent: Thursday, April 29, 2004 3:56 PM
Subject: a pl/sql question
Hi:
I have the following pl/sql function code that gets called a lot in our application. I have looked all the querys and they are running fine (have proper indexes, etc). I am now trying to see if I could optimize this code a bit. One thing I am thinking is that the sub pl/sql block within this function is creating some "overhead". But if I put the code "select abbrev into ..." in the function directly (instead of in pl/sql block) then how could I capture it's exception ("when others then select name into jname from journal where id=jid;")? Please let me know you have some ideas. Thanks.
Guang
begin
select title, volume, pages, year, journalid into ttl, vol, pg, yr, jid from ref where id=rn; begin
select abbrev into jname from journal2abbrev
where id=jid and medline='Y';
exception
when others then select name into jname from journal where id=jid;
end;
str := str || jname || ' ' || to_char(vol) || ', ' || pg; str := str || ' (' || to_char(yr) || ').';
return str;
exception
when others then return null;
end RefString;
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