X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FSybase%2FMicrosoft_SQL_Server.pm;h=0173facf619dcd62ab8654eb93b386477913fb6b;hb=ed720bc5bef8e8497ef8c3a56efc55143a6bd465;hp=cbde13d2bc24e088e3445af3f5daab193fbd8f6e;hpb=b75051301e6da537ee0f4a0494f2a3ffad448481;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm b/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm
index cbde13d..0173fac 100644
--- a/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm
@@ -3,36 +3,80 @@ package DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server;
 use strict;
 use warnings;
 
-use Class::C3;
 use base qw/
-  DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server
-  DBIx::Class::Storage::DBI::NoBindVars
+  DBIx::Class::Storage::DBI::Sybase
+  DBIx::Class::Storage::DBI::MSSQL
 /;
+use mro 'c3';
+
+sub _rebless {
+  my $self = shift;
+  my $dbh  = $self->_get_dbh;
+
+  return if ref $self ne __PACKAGE__;
+
+  if (not $self->_typeless_placeholders_supported) {
+    require
+      DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars;
+    bless $self,
+      'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars';
+    $self->_rebless;
+  }
+}
+
+sub _run_connection_actions {
+  my $self = shift;
+
+  # LongReadLen doesn't work with MSSQL through DBD::Sybase, and the default is
+  # huge on some versions of SQL server and can cause memory problems, so we
+  # fix it up here (see ::DBI::Sybase.pm)
+  $self->set_textsize;
+
+  $self->next::method(@_);
+}
+
+sub _dbh_begin_work {
+  my $self = shift;
+
+  $self->_get_dbh->do('BEGIN TRAN');
+}
+
+sub _dbh_commit {
+  my $self = shift;
+  my $dbh  = $self->_dbh
+    or $self->throw_exception('cannot COMMIT on a disconnected handle');
+  $dbh->do('COMMIT');
+}
+
+sub _dbh_rollback {
+  my $self = shift;
+  my $dbh  = $self->_dbh
+    or $self->throw_exception('cannot ROLLBACK on a disconnected handle');
+  $dbh->do('ROLLBACK');
+}
 
 1;
 
 =head1 NAME
 
-DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server - Storage::DBI subclass for MSSQL via
-DBD::Sybase
+DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server - Support for Microsoft
+SQL Server via DBD::Sybase
 
 =head1 SYNOPSIS
 
 This subclass supports MSSQL server connections via L<DBD::Sybase>.
 
-=head1 CAVEATS
+=head1 DESCRIPTION
 
-This storage driver uses L<DBIx::Class::Storage::DBI::NoBindVars> as a base.
-This means that bind variables will be interpolated (properly quoted of course)
-into the SQL query itself, without using bind placeholders.
+This driver tries to determine whether your version of L<DBD::Sybase> and
+supporting libraries (usually FreeTDS) support using placeholders, if not the
+storage will be reblessed to
+L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars>.
 
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
+The MSSQL specific functionality is provided by
+L<DBIx::Class::Storage::DBI::MSSQL>.
 
-The actual driver code for MSSQL is in
-L<DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server>.
-
-=head1 AUTHORS
+=head1 AUTHOR
 
 See L<DBIx::Class/CONTRIBUTORS>.