more dt docs reorg

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Storage / DBI / Sybase.pm

diff --git a/lib/DBIx/Class/Storage/DBI/Sybase.pm b/lib/DBIx/Class/Storage/DBI/Sybase.pm
index 3fb9045..f8b5004 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/Sybase.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase.pm
@@ -3,6 +3,7 @@ package DBIx::Class::Storage::DBI::Sybase;
 use strict;
 use warnings;
 
+use Class::C3;
 use base qw/DBIx::Class::Storage::DBI/;
 
 use Carp::Clan qw/^DBIx::Class/;
@@ -22,20 +23,48 @@ sub _rebless {
     if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
       bless $self, $subclass;
       $self->_rebless;
-    } elsif (not $self->dbh->{syb_dynamic_supported}) {
-# probably real Sybase
-      bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars';
-      $self->_rebless;
+    } else {
+      # real Sybase
+      if (not $self->dbh->{syb_dynamic_supported}) {
+        bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars';
+        $self->_rebless;
+      }
+      $self->connect_call_datetime_setup;
     }
   }
 }
 
+sub _populate_dbh {
+  my $self = shift;
+  $self->next::method(@_);
+  $self->connect_call_datetime_setup;
+  1;
+}
+
 {
   my $old_dbd_warned = 0;
 
-  sub _populate_dbh {
+=head2 connect_call_datetime_setup
+
+Used as:
+
+  on_connect_call => 'datetime_setup'
+
+In L<DBIx::Class::Storage::DBI/connect_info> to set:
+
+  $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
+  $dbh->do('set dateformat mdy');   # input fmt:  08/13/1979 18:08:55.080
+
+On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using
+L<DateTime::Format::Sybase>, which you will need to install.
+
+This works for both C<DATETIME> and C<SMALLDATETIME> columns, although
+C<SMALLDATETIME> columns only have minute precision.
+
+=cut
+
+  sub connect_call_datetime_setup {
     my $self = shift;
-    $self->next::method(@_);
     my $dbh = $self->_dbh;
 
     if ($dbh->can('syb_date_fmt')) {
@@ -60,7 +89,36 @@ sub _dbh_last_insert_id {
   return ($dbh->selectrow_array($sth))[0];
 }
 
-sub datetime_parser_type { "DBIx::Class::Storage::DBI::Sybase::DateTime" }
+sub count {
+  my $self = shift;
+  my ($source, $attrs) = @_;
+
+  if (not exists $attrs->{rows}) {
+    return $self->next::method(@_);
+  }
+
+  my $offset = $attrs->{offset} || 0;
+  my $total  = $attrs->{rows} + $offset;
+
+  my $new_attrs = $self->_copy_attributes_for_count($source, $attrs);
+
+  my $first_pk = ($source->primary_columns)[0];
+
+  $new_attrs->{select} = $first_pk ? "me.$first_pk" : 1;
+
+  my $tmp_rs = $source->resultset_class->new($source, $new_attrs);
+
+  $self->dbh->{syb_rowcount} = $total;
+
+  my $count = 0;
+  $count++ while $tmp_rs->cursor->next;
+
+  $self->dbh->{syb_rowcount} = 0;
+
+  return $count - $offset;
+}
+
+sub datetime_parser_type { "DateTime::Format::Sybase" }
 
 1;
 
@@ -70,43 +128,29 @@ DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
 
 =head1 SYNOPSIS
 
-This subclass supports L<DBD::Sybase> for real Sybase databases.  If
-you are using an MSSQL database via L<DBD::Sybase>, see
-L<DBIx::Class::Storage::DBI::Sybase::MSSQL>.
-
-=head1 CAVEATS
+This subclass supports L<DBD::Sybase> for real Sybase databases.  If you are
+using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to
+L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
 
-If your version of Sybase does not support placeholders, then this storage
-driver uses L<DBIx::Class::Storage::DBI::NoBindVars> as a base,
+=head1 DESCRIPTION
 
-In which case, bind variables will be interpolated (properly quoted of course)
-into the SQL query itself, without using bind placeholders.
+If your version of Sybase does not support placeholders, then your storage
+will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can
+also enable that driver explicitly, see the documentation for more details.
 
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
-
-If your version of Sybase B<DOES> support placeholders (check
-C<<$dbh->{syb_dynamic_supported}>> then unfortunately there's no way to get the
-C<last_insert_id> without doing a C<select max(col)>.
+With this driver there is unfortunately no way to get the C<last_insert_id>
+without doing a C<select max(col)>.
 
 But your queries will be cached.
 
 =head1 DATES
 
-On connection C<syb_date_fmt> is set to C<ISO_strict>, e.g.:
-C<2004-08-21T14:36:48.080Z> and C<dateformat> is set to C<mdy>, e.g.:
-C<08/13/1979>.
-
-You will need the L<DateTime::Format::Strptime> module if you are going to use
-L<DBIx::Class::InflateColumn::DateTime>.
+See L</connect_call_datetime_setup> to setup date formats
+for L<DBIx::Class::InflateColumn::DateTime>.
 
 =head1 AUTHORS
 
-Brandon L Black <blblack@gmail.com>
-
-Justin Hunter <justin.d.hunter@gmail.com>
-
-Rafael Kitover <rkitover@cpan.org>
+See L<DBIx::Class/CONTRIBUTORS>.
 
 =head1 LICENSE