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Top Forums UNIX for Advanced & Expert Users Call parallel sql scripts from shell and return status when both sql are done Post 302495219 by huasheng8 on Wednesday 9th of February 2011 04:51:01 PM
Old 02-09-2011
I tried do this:

Code:
(command) &
pid=$!

but $pid is null. Does the command background job has to finish for pid to have a value? I need the command to be submitted in the background and running there, and the shell kicks off another background job that process in the background too.
This is my code:

Code:
{
  echo "$ORA_LOGIN"
  echo "@$file_name;"
} | sqlplus -silent >> test.log 2>&1 &
SQL1_PID=$!
echo "SQL1_PID is $SQl1_PID."

And the output is SQL1_PID is .

Why is that?

Thank you!

Last edited by radoulov; 02-09-2011 at 05:56 PM.. Reason: Code tags, please!
 

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shell(1F)							   FMLI Commands							 shell(1F)

NAME
shell - run a command using shell SYNOPSIS
shell command [command] ... DESCRIPTION
The shell function concatenate its arguments, separating each by a space, and passes this string to the shell ($SHELL if set, otherwise /usr/bin/sh). EXAMPLES
Example 1 A sample output of shell command. Since the Form and Menu Language does not directly support background processing, the shell function can be used instead. `shell "build prog > /dev/null &"` If you want the user to continue to be able to interact with the application while the background job is running, the output of an exe- cutable run by shell in the background must be redirected: to a file if you want to save the output, or to /dev/null if you don't want to save it (or if there is no output), otherwise your application may appear to be hung until the background job finishes processing. shell can also be used to execute a command that has the same name as an FMLI built-in function. NOTES
The arguments to shell will be concatenate using spaces, which may or may not do what is expected. The variables set in local environments will not be expanded by the shell because "local" means "local to the current process." ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
sh(1), attributes(5) SunOS 5.11 5 Jul 1990 shell(1F)
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