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Dir : ~/home/vo/perl/mod/DBI-1.13/

Edit File: test.pl

#!/usr/local/bin/perl -w

# $Id: test.pl,v 10.3 1999/05/18 22:04:23 timbo Exp $
#
# Copyright (c) 1994-1998 Tim Bunce
#
# See COPYRIGHT section in DBI.pm for usage and distribution rights.

# This is now mostly an empty shell I experiment with.
# The real tests have moved to t/*.t
# See t/*.t for more detailed tests.

BEGIN {
    print "$0 @ARGV\n";
    print q{DBI test application $Revision: 10.3 $}."\n";
    $| = 1;
    eval "require blib; import blib;";	# wasn't in 5.003, hence the eval
	warn $@ if $@;
}

use DBI;

use DBI::DBD;	# simple test to make sure it's okay

use Config;
use Getopt::Long;
use strict;

$::opt_d = 0;
$::opt_l = '';
$::opt_h = 0;
$::opt_m = 0;		# basic memory leak test: "perl test.pl -m NullP"
$::opt_t = 0;		# thread test
$::opt_n = 0;		# counter for other options

GetOptions(qw(d=i h=i l=s m t=i n=i))
    or die "Usage: $0 [-d n] [-h n] [-m] [-t n] [-n n] [drivername]\n";

my $count = 0;
my $ps = (-d '/proc') ? "ps -lp " : "ps -l";
my $driver = $ARGV[0] || ($::opt_m ? 'NullP' : 'ExampleP');

# Now ask for some information from the DBI Switch
my $switch = DBI->internal;
$switch->debug($::opt_h); # 2=detailed handle trace

DBI->trace($::opt_d, $::opt_l) if $::opt_d || $::opt_l;

print "Switch: $switch->{'Attribution'}, $switch->{'Version'}\n";

print "Available Drivers: ",join(", ",DBI->available_drivers(1)),"\n";

my $dbh = DBI->connect('', '', '', $driver);
$dbh->debug($::opt_h);

if (0) {	# only works after 5.004_04
    my $h = DBI->connect('dbi:NullP:','','');
	$h->trace(3);
	{
		warn "RaiseError= '$h->{RaiseError}' (pre local)\n";
		local($h->{RaiseError}) = 1;
		warn "RaiseError= '$h->{RaiseError}' (post local)\n";
	}
	warn "RaiseError= '$h->{RaiseError}' (post local block)\n";
}

if ($::opt_m) {
    mem_test($dbh) while 1;
}
elsif ($::opt_t) {
	thread_test();
}
else {

# new experimental connect_test_perf method
    DBI->connect_test_perf("dbi:$driver:", '', '', {
	dbi_loops=>5, dbi_par=>20, dbi_verb=>1
    });

require Benchmark;
    print "Testing handle creation speed...\n";
    my $null_dbh = DBI->connect('dbi:NullP:','','');
    my $null_sth = $null_dbh->prepare('');	# create one to warm up
    $count = 5000;
    my $i = $count;
    my $t1 = new Benchmark;
    $null_dbh->prepare('') while $i--;
    my $td = Benchmark::timediff(Benchmark->new, $t1);
    my $tds= Benchmark::timestr($td);
    my $dur = $td->cpu_a;
    printf "$count NullP statement handles cycled in %.1f cpu+sys seconds (%d per sec)\n\n",
	    $dur, $count / $dur;

}

#DBI->trace(4);
print "$0 done\n";
exit 0;

sub mem_test {	# harness to help find basic leaks
    my($dbh) = @_;
	system("echo $count; $ps$$") if (($count++ % 1000) == 0);
    my $cursor_a = $dbh->prepare("select mode,ino,name from ?");
    $cursor_a->execute('/usr');
    my @row_a = $cursor_a->fetchrow;
    $cursor_a->finish;
}

sub thread_test {
	require Thread;
	my $dbh = DBI->connect("dbi:ExampleP:.", "", "") || die $DBI::err;
	#$dbh->trace(4);
	my @t;
	print "Starting $::opt_t threads:\n";
	foreach(1..$::opt_t) {
		print "$_\n";
		push @t, Thread->new(\&thread_test_loop, $dbh, $::opt_n||99);
	}
	print "Small sleep to allow threads to progress\n";
	sleep 2;
	print "Joining threads:\n";
	foreach(@t) {
		print "$_\n";
		$_->join
	}
}

sub thread_test_loop {
	my $dbh = shift;
	my $i = shift || 10;
    while($i-- > 0) {
		$dbh->selectall_arrayref("select * from ?", undef, ".");
	}
}

# end.