Trap the EXIT_CODE from a script


 
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Old 06-24-2018
the V$LOCK database shows deadlocks. Most oracle "hangs" are caused by another, usually interactive process, that has a previous lock on a row. Your code performs DDL which does implicit locking (update, insert, etc.), so it is susceptible. Have your DBA clobber the offending process.

Example: We had lots of users who left for lunch in the middle of an update/insert Oracle form. Since we could not rewrite hundreds of forms to be better about transactions and locking, the DBA intervened and killed off the offending user process when a batch job got hung.

Consider DBA help.

Also oracle code example of a deadlock workaround:
Programming applications to handle deadlocks
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RBASH(1)						      General Commands Manual							  RBASH(1)

NAME
rbash - restricted bash, see bash(1) RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow- ing are disallowed or not performed: o changing directories with cd o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV o specifying command names containing / o specifying a file name containing a / as an argument to the . builtin command o specifying a filename containing a slash as an argument to the -p option to the hash builtin command o importing function definitions from the shell environment at startup o parsing the value of SHELLOPTS from the shell environment at startup o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators o using the exec builtin command to replace the shell with another command o adding or deleting builtin commands with the -f and -d options to the enable builtin command o using the enable builtin command to enable disabled shell builtins o specifying the -p option to the command builtin command o turning off restricted mode with set +r or set +o restricted. These restrictions are enforced after any startup files are read. When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script. SEE ALSO
bash(1) GNU Bash-4.0 2004 Apr 20 RBASH(1)