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package SQL::Translator::Parser::DBI::MySQL;
# -------------------------------------------------------------------
# $Id: MySQL.pm,v 1.4 2004/02/09 22:23:40 kycl4rk Exp $
# -------------------------------------------------------------------
# Copyright (C) 2002-4 SQLFairy Authors
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA
# -------------------------------------------------------------------
=head1 NAME
SQL::Translator::Parser::DBI::MySQL - parser for DBD::mysql
=head1 SYNOPSIS
This module will be invoked automatically by SQL::Translator::Parser::DBI,
so there is no need to use it directly.
=head1 DESCRIPTION
Uses SQL calls to query database directly for schema rather than parsing
a create file. Should be much faster for larger schemas.
=cut
use strict;
use DBI;
use Data::Dumper;
use SQL::Translator::Schema::Constants;
use vars qw[ $DEBUG $VERSION @EXPORT_OK ];
$VERSION = sprintf "%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/;
$DEBUG = 0 unless defined $DEBUG;
# -------------------------------------------------------------------
sub parse {
my ( $tr, $dbh ) = @_;
my $schema = $tr->schema;
my @table_names = @{ $dbh->selectcol_arrayref( 'show tables') };
for my $table_name ( @table_names ) {
my $table = $schema->add_table(
name => $table_name,
) or die $schema->error;
my $cols = $dbh->selectall_arrayref(
"desc $table_name",
{ Columns => {} }
);
for my $col ( @$cols ) {
my $fname = $col->{'field'} or next;
my $type = $col->{'type'} or next;
my $collation = $col->{'collation'} || '';
my $is_nullable = uc $col->{'null'} eq 'YES' ? 1 : 0;
my $key = $col->{'key'};
my $default = $col->{'default'};
my $extra = $col->{'extra'};
my ( $data_type, $size, $char_set );
#
# Normal datatype = "int(11)"
# or "varchar(20) character set latin1"
#
if ( $type =~ m{
(\w+) # data type
\( # open paren
(\d+) # first number
(?:,(\d+))? # optional comma and number
\) # close paren
(.*)? # anything else (character set)
}x
) {
$data_type = $1;
$size = $2;
$size .= ",$3" if $3;
$char_set = $4 || '';
}
#
# Some data type just say "double" or "text"
#
elsif ( $type =~ m{
(\w+) # data type
(.*)? # anything else (character set)
}x
) {
$data_type = $1;
$size = undef;
$char_set = $2 || '';
}
my $field = $table->add_field(
name => $fname,
data_type => $data_type,
size => $size,
default_value => $default,
is_auto_increment => $extra eq 'auto_increment',
is_nullable => $is_nullable,
comments => $extra,
) or die $table->error;
$table->primary_key( $field->name ) if $key eq 'PRI';
}
my $indices = $dbh->selectall_arrayref(
"show index from $table_name",
{ Columns => {} },
);
my ( %keys, %constraints, $order );
for my $index ( @$indices ) {
my $table = $index->{'table'};
my $non_unique = $index->{'non_unique'};
my $key_name = $index->{'key_name'} || '';
my $seq_in_index = $index->{'seq_in_index'};
my $column_name = $index->{'column_name'};
my $collation = $index->{'collation'};
my $cardinality = $index->{'cardinality'};
my $sub_part = $index->{'sub_part'};
my $packed = $index->{'packed'};
my $null = $index->{'null'};
my $index_type = $index->{'index_type'};
my $comment = $index->{'comment'};
my $is_constraint = $key_name eq 'PRIMARY' || $non_unique == 0;
if ( $is_constraint ) {
$constraints{ $key_name }{'order'} = ++$order;
push @{ $constraints{ $key_name }{'fields'} }, $column_name;
if ( $key_name eq 'PRIMARY' ) {
$constraints{ $key_name }{'type'} = PRIMARY_KEY;
}
elsif ( $non_unique == 0 ) {
$constraints{ $key_name }{'type'} = UNIQUE;
}
}
else {
$keys{ $key_name }{'order'} = ++$order;
push @{ $keys{ $key_name }{'fields'} }, $column_name;
}
}
for my $key_name (
sort { $keys{ $a }{'order'} <=> $keys{ $b }{'order'} }
keys %keys
) {
my $key = $keys{ $key_name };
my $index = $table->add_index(
name => $key_name,
type => NORMAL,
fields => $key->{'fields'},
) or die $table->error;
}
for my $constraint_name (
sort { $constraints{ $a }{'order'} <=> $constraints{ $b }{'order'} }
keys %constraints
) {
my $def = $constraints{ $constraint_name };
my $constraint = $table->add_constraint(
name => $constraint_name,
type => $def->{'type'},
fields => $def->{'fields'},
) or die $table->error;
}
}
return 1;
}
1;
# -------------------------------------------------------------------
# Where man is not nature is barren.
# William Blake
# -------------------------------------------------------------------
=pod
=head1 AUTHOR
Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
=head1 SEE ALSO
SQL::Translator.
=cut
|
