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Top Forums Shell Programming and Scripting How to avoid locks while loading database through UNIX script.? Post 302862567 by gnnsprapa on Friday 11th of October 2013 03:40:01 AM
Old 10-11-2013
How to avoid locks while loading database through UNIX script.?

Hi,

I have the following requirement:

I have load_cdr as main scriptwhich loads all the file records into vertica database through unix script. But there are two files which try to update same table..n thats y my script is getting failed...

Can any1 give me some logic how to over come this error..i need to lock the table if one file is getting loaded( i guess this is be default as when ever we apply update automatically it locks the table) and then if any other file try to update that same table..instead of fail attempt that second file should waut until first file gets loaded completely...

i need to inherit these changes in my load_cdr main script...can any1 provide input on this..Smilie

Thanks,
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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