Question

create_fiile

Asked by: sam15

What would be the fastest way of writing the contents of V$session to a file system every 10 minutes. Did anyone write similar code for thist?

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Asked On
2009-11-06 at 15:35:20ID24879637
Topic

Oracle 9.x

Participating Experts
1
Points
500
Comments
10

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Answers

 

by: HainKurtPosted on 2009-11-06 at 15:46:35ID: 25764093

here is a sample code on how to write something into a text file

declare
    f utl_file.file_type;
    s varchar2(200);
begin
    f := utl_file.fopen('SAMPLEDATA','sample1.txt','R');
    loop
        utl_file.get_line(f,s);
        dbms_output.put_line(s);
    end loop;
exception
    when NO_DATA_FOUND then
        utl_file.fclose(f);
end;

write a stored proc (implement something above), create a job, schedule it to run every 10 minutes,

in the sp, dynamically create the filename using sysdate, to_char functions

similar to this one

select 'Sessions_' || to_char(sysdate,'YYYYMMDD_HHMI') || '.txt' from dual

 

by: HainKurtPosted on 2009-11-06 at 15:48:44ID: 25764100

here is the detail for this package UTL_FILE

http://download-west.oracle.com/docs/cd/B19306_01/appdev.102/b14258/u_file.htm

I guess in the above code, the file open mode should be w to be able to write, just check the page above for more information

 

by: sam15Posted on 2009-11-06 at 15:51:15ID: 25764112

how do you modify this to write the EMP file to a file. what is SAMPLEDATA there.

 

by: HainKurtPosted on 2009-11-06 at 16:24:16ID: 25764298

that was just an example, here is the code (extend it and add all other columns relevant to you in v$session)

CREATE PROCEDURE writesessionlogs
AS
   f   UTL_FILE.file_type;
   s   VARCHAR2 (200);
BEGIN
   -- LOG_DIR is a directory object in db that shows a physical path
   f :=
      UTL_FILE.fopen ('LOG_DIR',
                         'Sessions_'
                      || TO_CHAR (SYSDATE, 'YYYYMMDD_HHMI')
                      || '.txt',
                      'W'
                     );
 
   f.put_line ('SID  osuser     ');
   f.put_line ('---- ---------- ');
   FOR r IN (SELECT *
               FROM v$session)
   LOOP
      f.put_line (r.SID || ', ' || r.osuser);
   END LOOP;
 
   f.CLOSE ();
END;

                                              
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by: HainKurtPosted on 2009-11-06 at 16:26:27ID: 25764309

how to create LOG_DIR (used above) :

CREATE OR REPLACE DIRECTORY LOG_DIR AS 'C:\Logs\Oracle\Sessions';

 

by: sam15Posted on 2009-11-07 at 14:32:40ID: 25768384

i had t ofix a few things. do you know why it still does no twork.

 1  create or replace PROCEDURE WRITESESSIONLOGS
  2  AS
  3     f   UTL_FILE.file_type;
  4     s   VARCHAR2 (200);
  5  BEGIN
  6     -- LOG_DIR is a directory object in db that shows a physical path
  7     f :=
  8        UTL_FILE.fopen (' /tips/prd',
  9                           'Sessions_'
10                        || TO_CHAR (SYSDATE, 'YYYYMMDD_HHMI')
11                        || '.txt',
12                        'W'
13                       );
14     dbms_output.put_line ('SID  osuser     ');
15     dbms_output.put_line ('---- ---------- ');
16     FOR r IN (SELECT *
17                 FROM v$session)
18     LOOP
19        dbms_output.put_line (r.SID || ', ' || r.osuser);
20     END LOOP;
21     utl_file.fCLOSE(f);
22* END;
23  /

Procedure created.

SQL> exec writesessionlogs
BEGIN writesessionlogs; END;

*
ERROR at line 1:
ORA-29280: invalid directory path
ORA-06512: at "SYS.UTL_FILE", line 18
ORA-06512: at "SYS.UTL_FILE", line 424
ORA-06512: at "AVVADMIN.WRITESESSIONLOGS", line 7
ORA-06512: at line 1

when i do show parameter dir
it lists the parameter i included in the procedure.

 

by: HainKurtPosted on 2009-11-07 at 18:38:37ID: 25769204

first you have tio create a directory object in oracle... this is an alias to a physical path, so in your case

CREATE OR REPLACE DIRECTORY LOG_DIR AS 'C:\tips\prd';

and after this use tghe code below to create a file to write

        UTL_FILE.fopen ('LOG_DIR', 'Sessions_'
                        || TO_CHAR (SYSDATE, 'YYYYMMDD_HHMI')
                        || '.txt',
                        'W'
                       );
                                              
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by: sam15Posted on 2009-11-07 at 21:25:19ID: 25769499

i used one of the existing directories listed under utl_file_dir and it did not work.
do i have to create a new directory on the server.

 

by: HainKurtPosted on 2009-11-07 at 21:33:23ID: 25769513

create  a new one (maybe they are pointing to nowhere, and also you dont want to write your files into oracle directories)

 

by: sam15Posted on 2009-11-07 at 21:58:48ID: 25769550

I did. Now i get this error.

SQL> exec writesessionlogs;
BEGIN writesessionlogs; END;

*
ERROR at line 1:
ORA-29283: invalid file operation
ORA-06512: at "SYS.UTL_FILE", line 449
ORA-29283: invalid file operation
ORA-06512: at "WRITESESSIONLOGS", line 7
ORA-06512: at line 1

20120131-EE-VQP-002

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