#!/usr/bin/perl eval 'exec /usr/bin/perl -S $0 ${1+"$@"}' if 0; # not running under some shell =head1 NAME dbilogstrip - filter to normalize DBI trace logs for diff'ing =head1 SYNOPSIS Read DBI trace file C<dbitrace.log> and write out a stripped version to C<dbitrace_stripped.log> dbilogstrip dbitrace.log > dbitrace_stripped.log Run C<yourscript.pl> twice, each with different sets of arguments, with DBI_TRACE enabled. Filter the output and trace through C<dbilogstrip> into a separate file for each run. Then compare using diff. (This example assumes you're using a standard shell.) DBI_TRACE=2 perl yourscript.pl ...args1... 2>&1 | dbilogstrip > dbitrace1.log DBI_TRACE=2 perl yourscript.pl ...args2... 2>&1 | dbilogstrip > dbitrace2.log diff -u dbitrace1.log dbitrace2.log =head1 DESCRIPTION Replaces any hex addresses, e.g, C<0x128f72ce> with C<0xN>. Replaces any references to process id or thread id, like C<pid#6254> with C<pidN>. So a DBI trace line like this: -> STORE for DBD::DBM::st (DBI::st=HASH(0x19162a0)~0x191f9c8 'f_params' ARRAY(0x1922018)) thr#1800400 will look like this: -> STORE for DBD::DBM::st (DBI::st=HASH(0xN)~0xN 'f_params' ARRAY(0xN)) thrN =cut use strict; while (<>) { # normalize hex addresses: 0xDEADHEAD => 0xN s/ \b 0x [0-9a-f]+ /0xN/gx; # normalize process and thread id number s/ \b (pid|tid|thr) \W? \d+ /${1}N/gx; } continue { print or die "-p destination: $!\n"; }