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gav (2710)

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Hacker in NYC.

Journal of gav (2710)

Saturday March 20, 2004
04:59 PM

MySQL Dump Files

[ #17983 ]

MySQL Tip of the Day: make sure you're keeping regular backups of your data (with mysqldump ) in case you do something stupid and delete a whole bunch of data.

This little script takes a dump file and extracts the SQL INSERT statements into a new file for the table you specify. It's handy if you want to restore just a single table without deleting the existing data in it.

#!/usr/bin/perl -w
use strict;
use Getopt::Long;
    'file=s' => \my $fn_in, 'out=s' => \my $fn_out, 'table=s' => \my $table
unless ($fn_in && $table) {
    die "Usage: $0 --file=<filename> --table=<table> [--out=<output_file>]\n"
$fn_out ||= "$fn_in.$table";
open my $in, '<', $fn_in or die "Fatal: cannot open '$fn_in': $!\n";
open my $out, '>', $fn_out or die "Fatal: cannot write to '$fn_out': $!\n";
my $write;
while (<$in>) {
    if ($write) {
        last if /^UNLOCK TABLES/;
        print {$out} $_;
    } else {
        $write = 1 if /^LOCK TABLES $table/;
close $in;
close $out;

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