Writing Oracle Application with Pro*C

Hi,
Does anyone know how to write an application in Oracle
(probably using Pro*C) such that, the results produced by a sql
query can be produced with minimum response time ?
I have tried using cursors, but I realised that the results
are not produced as it goes along, meaning, it has to wait for
the "OPEN curosr" command to finish, before we get our first few
tuples.
Also, there seems to have some problem for using hints in
Pro*C, I have tried using statement such as "SELECT /*+ USE_NL
(R) */ ... " But it is as equivalent to not having that hint. I
tried the samething in sqlplus, it works fine, but not with my
Pro*C application.
Is there anyone out there doing similar stuff ? I would
appreciate if you can share some experience with me. Thank you
very much.
Regards,
Chia Chou
null

I have written many Pro*C programs and have been an Oracle DBA
for over 5 years. Response time is an interesting topic. Your
questions does not seem to focus on response time. Response time
is usually improved by database design and effective SQL. Almost
everything else is insignificant. Try doing explain plan's to
view your SQL's path and optimize this for every SQL that is in
your application. I have written Pro*c applications that operate
in parallel putting hundreds of thousands of records in
reasonable amounts of time. You can also improve time by using
array processing. As far as SELECT statements, if there are
multiple rows returned, cursors are the only way to go. Anyway,
if you have other concerns or questions, drop me an e-mail.
-Jim
[email protected]
Chia Chou (guest) wrote:
: Hi,
: Does anyone know how to write an application in Oracle
: (probably using Pro*C) such that, the results produced by a
sql
: query can be produced with minimum response time ?
: I have tried using cursors, but I realised that the results
: are not produced as it goes along, meaning, it has to wait for
: the "OPEN curosr" command to finish, before we get our first
few
: tuples.
: Also, there seems to have some problem for using hints in
: Pro*C, I have tried using statement such as "SELECT /*+ USE_NL
: (R) */ ... " But it is as equivalent to not having that hint.
I
: tried the samething in sqlplus, it works fine, but not with my
: Pro*C application.
: Is there anyone out there doing similar stuff ? I would
: appreciate if you can share some experience with me. Thank you
: very much.
: Regards,
: Chia Chou
null

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