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#!/usr/bin/perl -w
#
# bzdbcopy.pl - Copies data from one Bugzilla database to another.
#
# Author: Max Kanat-Alexander <mkanat@bugzilla.org>
#
# The intended use of this script is to copy data from an installation
# running on one DB platform to an installation running on another
# DB platform.
#
# It must be run from the directory containing your Bugzilla installation.
# That means if this script is in the contrib/ directory, you should
# be running it as: ./contrib/bzdbcopy.pl
#
# Note: Both schemas must already exist and be IDENTICAL. (That is,
# they must have both been created/updated by the same version of
# checksetup.pl.) This script will DESTROY ALL CURRENT DATA in the
# target database.
#
# Both Schemas must be at least from Bugzilla 2.19.3, but if you're
# running a Bugzilla from before 2.20rc2, you'll need the patch at:
# https://bugzilla.mozilla.org/show_bug.cgi?id=300311 in order to
# be able to run this script.
#
# Before you using it, you have to correctly set all the variables
# in the "User-Configurable Settings" section, below. The "SOURCE"
# settings are for the database you're copying from, and the "TARGET"
# settings are for the database you're copying to. The DB_TYPE is
# the name of a DB driver from the Bugzilla/DB/ directory.
#
use strict;
use lib ".";
use Bugzilla::DB;
use Bugzilla::Util;
#####################################################################
# User-Configurable Settings
#####################################################################
# Settings for the 'Source' DB that you are copying from.
use constant SOURCE_DB_TYPE => 'Mysql';
use constant SOURCE_DB_NAME => 'bugs';
use constant SOURCE_DB_USER => 'bugs';
use constant SOURCE_DB_PASSWORD => '';
# Settings for the 'Target' DB that you are copying to.
use constant TARGET_DB_TYPE => 'Pg';
use constant TARGET_DB_NAME => 'bugs';
use constant TARGET_DB_USER => 'bugs';
use constant TARGET_DB_PASSWORD => '';
#####################################################################
# MAIN SCRIPT
#####################################################################
print "Connecting to the '" . SOURCE_DB_NAME . "' source database on "
. SOURCE_DB_TYPE . "...\n";
my $source_db = Bugzilla::DB::_connect(SOURCE_DB_TYPE, 'localhost',
SOURCE_DB_NAME, undef, undef, SOURCE_DB_USER, SOURCE_DB_PASSWORD);
print "Connecting to the '" . TARGET_DB_NAME . "' target database on "
. TARGET_DB_TYPE . "...\n";
my $target_db = Bugzilla::DB::_connect(TARGET_DB_TYPE, 'localhost',
TARGET_DB_NAME, undef, undef, TARGET_DB_USER, TARGET_DB_PASSWORD);
# We use the table list from the target DB, because if somebody
# has customized their source DB, we still want the script to work,
# and it may otherwise fail in that situation (that is, the tables
# may not exist in the target DB).
my @table_list = $target_db->bz_table_list_real();
# We don't want to copy over the bz_schema table's contents.
my $bz_schema_location = lsearch(\@table_list, 'bz_schema');
splice(@table_list, $bz_schema_location, 1) if $bz_schema_location > 0;
# We turn off autocommit on the target DB, because we're doing so
# much copying.
$target_db->{AutoCommit} = 0;
$target_db->{AutoCommit} == 0
|| warn "Failed to disable autocommit on " . TARGET_DB_TYPE;
foreach my $table (@table_list) {
my @serial_cols;
print "Reading data from the source '$table' table on "
. SOURCE_DB_TYPE . "...\n";
my @table_columns = $target_db->bz_table_columns_real($table);
my $select_query = "SELECT " . join(',', @table_columns) . " FROM $table";
my $data_in = $source_db->selectall_arrayref($select_query);
my $insert_query = "INSERT INTO $table ( " . join(',', @table_columns)
. " ) VALUES (";
$insert_query .= '?,' foreach (@table_columns);
# Remove the last comma.
chop($insert_query);
$insert_query .= ")";
my $insert_sth = $target_db->prepare($insert_query);
print "Clearing out the target '$table' table on "
. TARGET_DB_TYPE . "...\n";
$target_db->do("DELETE FROM $table");
print "Writing data to the target '$table' table on "
. TARGET_DB_TYPE . "...";
foreach my $row (@$data_in) {
# Each column needs to be bound separately, because
# many columns need to be dealt with specially.
my $colnum = 0;
foreach my $column (@table_columns) {
# bind_param args start at 1, but arrays start at 0.
my $param_num = $colnum + 1;
my $already_bound;
# Certain types of columns need special handling.
my $col_info = $source_db->bz_column_info($table, $column);
if ($col_info && $col_info->{TYPE} eq 'LONGBLOB') {
$insert_sth->bind_param($param_num,
$row->[$colnum], $target_db->BLOB_TYPE);
$already_bound = 1;
}
elsif ($col_info && $col_info->{TYPE} =~ /decimal/) {
# In MySQL, decimal cols can be too long.
my $col_type = $col_info->{TYPE};
$col_type =~ /decimal\((\d+),(\d+)\)/;
my ($precision, $decimals) = ($1, $2);
# If it's longer than precision + decimal point
if ( length($row->[$colnum]) > ($precision + 1) ) {
# Truncate it to the highest allowed value.
my $orig_value = $row->[$colnum];
$row->[$colnum] = '';
my $non_decimal = $precision - $decimals;
$row->[$colnum] .= '9' while ($non_decimal--);
$row->[$colnum] .= '.';
$row->[$colnum] .= '9' while ($decimals--);
print "Truncated value $orig_value to " . $row->[$colnum]
. " for $table.$column.\n";
}
}
elsif ($col_info && $col_info->{TYPE} =~ /DATETIME/i) {
my $date = $row->[$colnum];
# MySQL can have strange invalid values for Datetimes.
$row->[$colnum] = '1901-01-01 00:00:00'
if $date && $date eq '0000-00-00 00:00:00';
}
$insert_sth->bind_param($param_num, $row->[$colnum])
unless $already_bound;
$colnum++;
}
$insert_sth->execute();
}
# PostgreSQL doesn't like it when you insert values into
# a serial field; it doesn't increment the counter
# automatically.
if ($target_db->isa('Bugzilla::DB::Pg')) {
foreach my $column (@table_columns) {
my $col_info = $source_db->bz_column_info($table, $column);
if ($col_info && $col_info->{TYPE} =~ /SERIAL/i) {
# Set the sequence to the current max value + 1.
my ($max_val) = $target_db->selectrow_array(
"SELECT MAX($column) FROM $table");
$max_val = 0 if !defined $max_val;
$max_val++;
print "\nSetting the next value for $table.$column to $max_val.";
$target_db->do("SELECT pg_catalog.setval
('${table}_${column}_seq', $max_val, false)");
}
}
}
print "\n\n";
}
print "Committing changes to the target database...\n";
$target_db->commit;
print "All done! Make sure to run checksetup on the new DB.\n";
$source_db->disconnect;
$target_db->disconnect;
1;