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Using stored procedure return value in batch file

Posted on 2009-07-15
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Last Modified: 2012-06-27
Hi,

The below procedure returns the count of rows in a table. I need to call this Sprocedure from batch file. I need to use the value returned from the procedure in the batch file.

CREATE PROCEDURE get_count()
LANGUAGE SQL
P1:BEGIN ATOMIC
DECLARE CNT INTEGER;
select count(*) into CNT from administrator.test_title;
RETURN CNT;
END P1
@

Please give a solution for this. Thanks!.
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Question by:jsaravana
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5 Comments
 

Author Comment

by:jsaravana
ID: 24866693
Hi experts,

Could anybody please address this post.
0
 
LVL 6

Assisted Solution

by:tangchunfeng
tangchunfeng earned 800 total points
ID: 24867016
db2 "select count(*) into CNT from administrator.test_title"  > a.txt
var1=`grep '^     ' a.txt`
echo $var1
0
 
LVL 46

Accepted Solution

by:
Kent Olsen earned 1200 total points
ID: 24868537
Hi jsaravana,

Your example seems to be from a SQL Server system.  Then again, the SELECT ... INTO form in SQL Server writes to a table, not a variable.  SQL Server has a non-standard extension that allows stored procedures to return a value.  DB2 conforms to the more widely held standard where stored procedures do not return a value to the calling procedure, but can return values via the parameter list.  If you want to return a value you must write it as a function.

Tangchunfenq's example is fine.  :)  I've written quite a few like it.

If you want a "canned routine" that you can call, create a function and use it.

  CREATE FUNCTION get_count ()
  AS
  SELECT count(*) FROM administrator.test_title;

Then you can call the function

  db2 "SELECT get_count () FROM sysibm.sysdummy1" > a.txt
  var1=`grep '^   ' a.txt`

DB2 requires a table name on the SELECT statement, so you must query against sysibm.sysdummy1.


Good Luck,
Kent
0
 

Author Closing Comment

by:jsaravana
ID: 31604098
Thanks..
Both the logic was helpful for me to find the count. I wanted to call the stored procedure from windows batch file so grep would not have worked. As returning is not possible I stored the count of rows in a file. Then used 'find' and 'fc' command of batch.
0
 
LVL 46

Expert Comment

by:Kent Olsen
ID: 24877673
Ahh...

Windows batch scripting was tagged.  We all missed that part.

Apologies,
Kent
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