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Full Discussion: PERL: how to tell if variable is NULL
Top Forums Shell Programming and Scripting PERL: how to tell if variable is NULL Post 34864 by dangral on Tuesday 18th of March 2003 01:47:11 PM
Old 03-18-2003
PERL: how to tell if variable is NULL
How to I do a check on a variable to see if it's null-- I am using Perl.
 

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LEARN ABOUT MOJAVE

dbd::gofer::transport::null

DBD::Gofer::Transport::null(3)				User Contributed Perl Documentation			    DBD::Gofer::Transport::null(3)

NAME

       DBD::Gofer::Transport::null - DBD::Gofer client transport for testing

SYNOPSIS

	 my $original_dsn = "..."
	 DBI->connect("dbi:Gofer:transport=null;dsn=$original_dsn",...)

       or, enable by setting the DBI_AUTOPROXY environment variable:

	 export DBI_AUTOPROXY="dbi:Gofer:transport=null"

DESCRIPTION

       Connect via DBD::Gofer but execute the requests within the same process.

       This is a quick and simple way to test applications for compatibility with the (few) restrictions that DBD::Gofer imposes.

       It also provides a simple, portable way for the DBI test suite to be used to test DBD::Gofer on all platforms with no setup.

       Also, by measuring the difference in performance between normal connections and connections via "dbi:Gofer:transport=null" the basic cost
       of using DBD::Gofer can be measured. Furthermore, the additional cost of more advanced transports can be isolated by comparing their
       performance with the null transport.

       The "t/85gofer.t" script in the DBI distribution includes a comparative benchmark.

AUTHOR

       Tim Bunce, <http://www.tim.bunce.name>

LICENCE AND COPYRIGHT

       Copyright (c) 2007, Tim Bunce, Ireland. All rights reserved.

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.

SEE ALSO

       DBD::Gofer::Transport::Base

       DBD::Gofer

perl v5.18.2							    2013-06-24					    DBD::Gofer::Transport::null(3)
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