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.\" ========================================================================
.\"
.IX Title "DBILOGSTRIP 1p"
.TH DBILOGSTRIP 1p "2020-10-29" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
dbilogstrip \- filter to normalize DBI trace logs for diff'ing
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
Read \s-1DBI\s0 trace file \f(CW\*(C`dbitrace.log\*(C'\fR and write out a stripped version to \f(CW\*(C`dbitrace_stripped.log\*(C'\fR
.PP
.Vb 1
\&  dbilogstrip dbitrace.log > dbitrace_stripped.log
.Ve
.PP
Run \f(CW\*(C`yourscript.pl\*(C'\fR twice, each with different sets of arguments, with
\&\s-1DBI_TRACE\s0 enabled. Filter the output and trace through \f(CW\*(C`dbilogstrip\*(C'\fR into a
separate file for each run. Then compare using diff. (This example assumes
you're using a standard shell.)
.PP
.Vb 3
\&  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
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Replaces any hex addresses, e.g, \f(CW0x128f72ce\fR with \f(CW\*(C`0xN\*(C'\fR.
.PP
Replaces any references to process id or thread id, like \f(CW\*(C`pid#6254\*(C'\fR with \f(CW\*(C`pidN\*(C'\fR.
.PP
So a \s-1DBI\s0 trace line like this:
.PP
.Vb 1
\&  \-> STORE for DBD::DBM::st (DBI::st=HASH(0x19162a0)~0x191f9c8 \*(Aqf_params\*(Aq ARRAY(0x1922018)) thr#1800400
.Ve
.PP
will look like this:
.PP
.Vb 1
\&  \-> STORE for DBD::DBM::st (DBI::st=HASH(0xN)~0xN \*(Aqf_params\*(Aq ARRAY(0xN)) thrN
.Ve