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package DBIx::DBSchema::DBD::SQLite;
use base qw( DBIx::DBSchema::DBD );
use strict;
use vars qw($VERSION %typemap);
$VERSION = '0.04';
%typemap = (
'SERIAL' => 'INTEGER PRIMARY KEY AUTOINCREMENT',
);
=head1 NAME
DBIx::DBSchema::DBD::SQLite - SQLite native driver for DBIx::DBSchema
=head1 SYNOPSIS
use DBI;
use DBIx::DBSchema;
$dbh = DBI->connect('dbi:SQLite:tns_service_name', 'user','pass');
$schema = new_native DBIx::DBSchema $dbh;
=head1 DESCRIPTION
This module implements a SQLite-native driver for DBIx::DBSchema.
=head1 AUTHORS
Jesse Vincent <jesse@bestpractical.com>
Nathan Anderson <http://1id.com/=nathan.anderson>
=cut
=head1 API
=over
=item columns CLASS DBI_DBH TABLE
Given an active DBI database handle, return a listref of listrefs (see
L<perllol>), each containing six elements: column name, column type,
nullability, column length, column default, and a field reserved for
driver-specific use (which for sqlite is whether this col is a primary key)
=cut
sub columns {
my ( $proto, $dbh, $table ) = @_;
my $sth = $dbh->prepare("PRAGMA table_info($table)");
$sth->execute();
my $rows = [];
while ( my $row = $sth->fetchrow_hashref ) {
# notnull # pk # name # type # cid # dflt_value
push @$rows,
[
$row->{'name'},
$row->{'type'},
( $row->{'notnull'} ? 0 : 1 ),
undef,
$row->{'dflt_value'},
$row->{'pk'}
];
}
return $rows;
}
=item primary_key CLASS DBI_DBH TABLE
Given an active DBI database handle, return the primary key for the specified
table.
=cut
sub primary_key {
my ($proto, $dbh, $table) = @_;
my $cols = $proto->columns($dbh,$table);
foreach my $col (@$cols) {
return ($col->[1]) if ($col->[5]);
}
return undef;
}
=item unique CLASS DBI_DBH TABLE
Given an active DBI database handle, return a hashref of unique indices. The
keys of the hashref are index names, and the values are arrayrefs which point
a list of column names for each. See L<perldsc/"HASHES OF LISTS"> and
L<DBIx::DBSchema::ColGroup>.
=cut
sub unique {
my ($proto, $dbh, $table) = @_;
my @names;
my $indexes = $proto->_index_info($dbh, $table);
foreach my $row (@$indexes) {
push @names, $row->{'name'} if ($row->{'unique'});
}
my $info = {};
foreach my $name (@names) {
$info->{'name'} = $proto->_index_cols($dbh, $name);
}
return $info;
}
=item index CLASS DBI_DBH TABLE
Given an active DBI database handle, return a hashref of (non-unique) indices.
The keys of the hashref are index names, and the values are arrayrefs which
point a list of column names for each. See L<perldsc/"HASHES OF LISTS"> and
L<DBIx::DBSchema::ColGroup>.
=cut
sub index {
my ($proto, $dbh, $table) = @_;
my @names;
my $indexes = $proto->_index_info($dbh, $table);
foreach my $row (@$indexes) {
push @names, $row->{'name'} if not ($row->{'unique'});
}
my $info = {};
foreach my $name (@names) {
$info->{'name'} = $proto->_index_cols($dbh, $name);
}
return $info;
}
sub _index_list {
my $proto = shift;
my $dbh = shift;
my $table = shift;
my $sth = $dbh->prepare('PRAGMA index_list($table)');
$sth->execute();
my $rows = [];
while ( my $row = $sth->fetchrow_hashref ) {
# Keys are "name" and "unique"
push @$rows, $row;
}
return $rows;
}
sub _index_cols {
my $proto = shift;
my $dbh = shift;
my $index = shift;
my $sth = $dbh->prepare('PRAGMA index_info($index)');
$sth->execute();
my $data = {};
while ( my $row = $sth->fetchrow_hashref ) {
# Keys are "name" and "seqno"
$data->{$row->{'seqno'}} = $data->{'name'};
}
my @results;
foreach my $key (sort keys %$data) {
push @results, $data->{$key};
}
return \@results;
}
sub default_db_schema { '%'; }
sub tables {
my($proto, $dbh) = @_;
my $db_catalog = $proto->default_db_catalog;
my $db_schema = $proto->default_db_schema;
my $sth = $dbh->table_info($db_catalog, $db_schema, '%', 'TABLE')
or die $dbh->errstr;
$proto->SUPER::tables($dbh, $sth);
}
=pod
=back
=cut
1;
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