Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Sybase returning row numbers

Posted on 2001-07-08
6
Medium Priority
?
3,021 Views
Last Modified: 2007-11-27
How can I get sybperl to give me the row count after executing an SQL Query (a "SELECT" query, for example).

If I query a database with ct_execute, I then call:

$count = $dbh -> ct_res_info(CS_NUMDATA)

...but $count seems to give me completely arbitrary values (i.e.: 15 for 10 rows, 58 for 713 rows, 180
for no results, etc..)

Am I missing something here?
0
Comment
Question by:Tonyboy
  • 3
  • 3
6 Comments
 
LVL 5

Expert Comment

by:amitpagarwal
ID: 6263674
Well - it would: that's the number of columns in the result set, not the number of rows. Use CS_ROW_COUNT instead.


 $rows = $dbh->ct_res_info(CS_ROW_COUNT);
0
 

Author Comment

by:Tonyboy
ID: 6265650
Hmmm... I agree with your solution, but given the following Perl script (I hope you're familiar):

if ($restype == CS_ROW_RESULT) {
     $sql_rows = $dbh -> ct_res_info(CS_ROW_COUNT) || 1;
}

For some reason, though, CS_ROW_COUNT never returns any value, and so the 1 is used (if I put 2 there, the 2 would be used, etc...)
0
 
LVL 5

Accepted Solution

by:
amitpagarwal earned 800 total points
ID: 6265688
It's a protocol thing... Sybase doesn't know (or doesn't tell the APIs) how many rows are returned until all the rows have been fetched,   so you can't know in advance how many rows will be returned by a query    unless you do a select count(*) first.

 The CS_ROW_COUNT property is really usefull for updates/inserts/deletes,   though...

That being said, the CS_ROW_COUNT attribute is retrievable once

                          ct_results returns a $restype of CS_CMD_DONE, so you should
                          write a loop to get the number of rows affected, like this:

                          $dbh->ct_execute($query);
                          while($dbh->ct_results($restype) == CS_SUCCEED) {
                              if($restype == CS_CMD_DONE) {
                                 $numrows = $dbh->ct_res_info(CS_ROW_COUNT);
                              }
                              # do any other processing here
                              # for example, process any fetchable rows:
                              if($dbh->ct_fetchable($restype)) {
                                 while(@dat = $dbh->ct_fetch) {
                                    # do whatever you need to do with the data...
                                 }
                               }
                          }


                          Hope this helps a little bit...
0
Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 

Author Comment

by:Tonyboy
ID: 6265748
Oh... That's dissapointing..

Is there any way of finding out how many rows are returned before fetching all of the results?
0
 
LVL 5

Expert Comment

by:amitpagarwal
ID: 6265754
listening ..
0
 

Author Comment

by:Tonyboy
ID: 6265798
???
0

Featured Post

[Webinar] Cloud Security

In this webinar you will learn:

-Why existing firewall and DMZ architectures are not suited for securing cloud applications
-How to make your enterprise “Cloud Ready”, and fix your aging DMZ architecture
-How to transform your enterprise and become a Cloud Enabler

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Your business may be under attack from a silent enemy that is hard to detect. It works stealthily in the shadows to access and exploit your critical business information, sensitive confidential data and intellectual property, for commercial gain. T…
Aerodynamic noise is the cause of the majority of the noise produced by helicopters. The inordinate amount of noise helicopters produce is a major problem in the both a military and civilian setting. To remedy this problem the use of an aerogel coat…
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…
Suggested Courses

971 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question