From: Øystein Torget <oystein.torget@dnv.com>
Date: Tue, 5 Feb 2008 08:55:39 +0000 (+0000)
Subject: Initial import of storage class for MS Acccess
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=bbe552a3fbfa23dd300ee51c02dd10a112a4bd44;p=dbsrgits%2FDBIx-Class-Historic.git

Initial import of storage class for MS Acccess
---

diff --git a/lib/DBIx/Class/Storage/DBI/ODBC/ACCESS.pm b/lib/DBIx/Class/Storage/DBI/ODBC/ACCESS.pm
new file mode 100644
index 0000000..1f0bfd9
--- /dev/null
+++ b/lib/DBIx/Class/Storage/DBI/ODBC/ACCESS.pm
@@ -0,0 +1,104 @@
+package DBIx::Class::Storage::DBI::ODBC::ACCESS;
+use strict;
+use warnings;
+
+use Data::Dump qw( dump );
+
+use base qw/DBIx::Class::Storage::DBI/;
+
+my $ERR_MSG_START = __PACKAGE__ . ' failed: ';
+
+sub insert {
+    my $self = shift;
+    my ( $source, $to_insert ) = @_;
+
+    my $bind_attributes = $self->source_bind_attributes( $source );
+    my ( undef, $sth ) = $self->_execute( 'insert' => [], $source, $bind_attributes, $to_insert );
+
+    #store the identity here since @@IDENTITY is connection global and this prevents
+    #possibility that another insert to a different table overwrites it for this resultsource
+    my $identity = 'SELECT @@IDENTITY';
+    my $max_sth  = $self->{ _dbh }->prepare( $identity )
+        or $self->throw_exception( $ERR_MSG_START . $self->{ _dbh }->errstr() );
+    $max_sth->execute() or $self->throw_exception( $ERR_MSG_START . $max_sth->errstr );
+
+    my $row = $max_sth->fetchrow_arrayref()
+        or $self->throw_exception( $ERR_MSG_START . "$identity did not return any result." );
+
+    $self->{ last_pk }->{ $source->name() } = $row;
+
+    return $to_insert;
+}
+
+sub last_insert_id {
+    my $self = shift;
+    my ( $result_source ) = @_;
+
+    return @{ $self->{ last_pk }->{ $result_source->name() } };
+}
+
+sub sqlt_type { 'ACCESS' }
+
+1;
+
+=head1 NAME
+
+DBIx::Class::Storage::ODBC::ACCESS - Support specific to MS Access over ODBC
+
+=head1 WARNING
+
+I am not a DBI, DBIx::Class or MS Access guru. Use this module with that in
+mind.
+
+This module is currently considered alpha software and can change without notice.
+
+=head1 DESCRIPTION
+
+This class implements support specific to Microsoft Access over ODBC. It currently only
+implements functions necessary for working with auto-incremented primary keys.
+
+It is loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it
+detects a MS Access back-end.
+
+=head1 SUPPORTED VERSIONS
+
+This module have currently only been tested on MS Access 2003 using the Jet 4.0 engine.
+
+As far as my knowledge it should work on MS Access 2000 or later, but that have not been tested.
+Information about support for different version of MS Access is welcome.
+
+=head1 IMPLEMENTATION NOTES
+
+MS Access supports the @@IDENTITY function for retriving the id of the latest inserted row.
+@@IDENTITY is global to the connection, so to support the possibility of getting the last inserted
+id for different tables, the insert() function stores the inserted id on a per table basis.
+last_insert_id() then just returns the stored value.
+
+=head1 IMPLEMENTED FUNCTIONS
+
+=head2 insert
+
+=head2 last_insert_id
+
+=head2 sqlt_type
+
+=head1 BUGS
+
+Most likely. Bug reports are welcome.
+
+=head1 AUTHORS
+
+Øystein Torget C<< <oystein.torget@dnv.com> >>
+
+=head1 COPYRIGHT
+
+You may distribute this code under the same terms as Perl itself.
+
+Det Norske Veritas AS (DNV)
+
+http://www.dnv.com
+
+
+
+=cut
+