Question

Unix commands from Oracle pl/sql

Asked by: lrothe

Hi:

How Could I execute an HpUX command from an Oracle pl/sql

Thanks

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Asked On
2003-10-08 at 08:19:51ID20760716
Tags

unix

,

oracle

,

command

,

from

Topic

Oracle Database

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Answers

 

by: seazodiacPosted on 2003-10-08 at 08:38:15ID: 9514034

if you can, it will a very daunting challenge...

the easy workaround is that you create a java stored procedure in which java PROCESS can  execute some operating system commands, and grant the proper privilege at the OS level, and in your plsql program , you call that java stored procedure.
there is a detailed example here:

see http://asktom.oracle.com/pls/ask/f?...ID:952229840241

 

by: rdr2004Posted on 2003-10-08 at 11:42:51ID: 9515328

when you are in SQL you can use "!" sign before the command to execute. I am not sure how you can use this in PS/SQL.

Example:
SQL> !ls -ltr
total 64
drwx------   2 psft       dba             96 Jul 31 16:23 Mail
-rw-r--r--   1 psft       dba            186 Aug 19 21:07 recere.sql
-rw-r--r--   1 psft       dba           8301 Aug 19 21:16 A.sql
drwxr-xr-x   3 psft       dba           8192 Sep  6 14:42 Scri

SQL>

All the best.

Raj

 

by: sdrozdPosted on 2003-10-08 at 13:46:43ID: 9516398

Hi,
May be if you give us details of what it is you are trying to do we can suggest something. For example, it's possible to create an OS file using UTL_FILE package and then execute it (you can execute it from crontab or manually). Other than that I am not aware of a direct execution of Unix commands from PL/SQL.

Also you can write a SQL (not PL/SQL) script that uses the spool command. spool will create an OS file that you can then execute. It's easy to create a Unix shell script that will connect to Oracle so some stuff, spool it and then execute it.

For example, the script below can be saved to a file and executed from Unix shell.
This script checks for invalid objects and generates a script to execute the alter statements.
#!/bin/ksh
. ~/.profile
export COM1="/ as sysdba"
export COM2="sqlplus -s /nolog"
$COM2 <<ESQL
connect $COM1
set pagesize 0
set heading off
set feedback off
select 'alter '||decode(object_type, 'PACKAGE BODY', 'PACKAGE', object_type)||' '||owner||'.'||'"'||object_name||'" compile'||decode(object_ty
pe, 'PACKAGE', ' package;', 'PACKAGE BODY', ' body;', 'VIEW', ';', ';') from dba_objects where object_type in ('FUNCTION', 'PROCEDURE', 'PACKA
GE', 'PACKAGE BODY', 'VIEW', 'TRIGGER') and status = 'INVALID' order by object_type;
spool recomplist.sql
/
spool off
set feedback on
@recomplist
set pagesize 20000
set heading on
exit
ESQL


OR

you can actually connect to Oracle yourself and then run just the middle part:

set pagesize 0
set heading off
set feedback off
select 'alter '||decode(object_type, 'PACKAGE BODY', 'PACKAGE', object_type)||' '||owner||'.'||'"'||object_name||'" compile'||decode(object_ty
pe, 'PACKAGE', ' package;', 'PACKAGE BODY', ' body;', 'VIEW', ';', ';') from dba_objects where object_type in ('FUNCTION', 'PROCEDURE', 'PACKA
GE', 'PACKAGE BODY', 'VIEW', 'TRIGGER') and status = 'INVALID' order by object_type;
spool recomplist.sql
/
spool off
set feedback on
@recomplist
set pagesize 20000
set heading on

Hopes it answers some of your questions,
sdrozd

 

by: benpungPosted on 2003-10-08 at 14:38:02ID: 9516734

you can issue unix commands from within a pl/sql procedure if you have oracle 8i or up. do the following:

insert this java procedure into the database:

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED "HOST" AS
import java.lang.*;
import java.io.*;

public class Host
{
  public static void executeCommand (String command, String etype) throws IOException
  {
    String[] wFullCommand = {"C:\\winnt\\system32\\cmd.exe", "/y", "/c", command};
    String[] uFullCommand = {"/bin/sh", "-c", command};
    if (etype.toUpperCase().equals("W"))
      Runtime.getRuntime().exec(wFullCommand);
    else if(etype.toUpperCase().equals("U+"))
      Runtime.getRuntime().exec(uFullCommand);
    else if(etype.toUpperCase().equals("U"))
      Runtime.getRuntime().exec(command);
  }
};
/

now compile this pl/sql wrapper procedure in the database:

CREATE OR REPLACE PROCEDURE Host_Command_Proc (p_command  IN  VARCHAR2, p_etype  IN  VARCHAR2)
AS LANGUAGE JAVA
NAME 'Host.executeCommand (java.lang.String, java.lang.String)';
/

to issue a unix command to remove all files from a directory for example, you would put this line in your pl/sql procedure:

host_command_proc ('cd home/yourdir/another_dir', 'U+');
host_command_proc ('rm -f *', 'U+');

**note: for this to work you must have the correct java classes loaded in the database.

if you have any more questions on how this works post back.

20120131-EE-VQP-002

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