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=5e53118b93140645fe8f601092f5af8f2fa1f888;hb=84ccbc01107eeadbbac452d5368b4dd74f12ab8e;hp=d4485a397f72bebb97dcff8cffcbbcd7572d9c97;hpb=d4483998dff1af8eff35b3c5398f564a9a1fb9d8;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 d4485a3..5e53118 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 +3,55 @@ package DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server;
 use strict;
 use warnings;
 
-use base qw/DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server DBIx::Class::Storage::DBI::Sybase/;
+use base qw/
+  DBIx::Class::Storage::DBI::Sybase::Base
+  DBIx::Class::Storage::DBI::MSSQL
+/;
+use mro 'c3';
+
+sub _rebless {
+  my $self = shift;
+  my $dbh  = $self->_dbh;
+
+  if (not $self->_placeholders_supported) {
+    bless $self,
+      'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars';
+    $self->_rebless;
+  }
+
+# 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.
+  my $text_size = eval { $self->_dbi_connect_info->[-1]->{LongReadLen} } ||
+    32768; # the DBD::Sybase default
+
+  $dbh->do("set textsize $text_size");
+}
 
 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 connected via L<DBD::Sybase>.
+This subclass supports MSSQL server connections via L<DBD::Sybase>.
 
-  $schema->storage_type('::DBI::Sybase::Microsoft_SQL_Server');
-  $schema->connect_info('dbi:Sybase:....', ...);
+=head1 DESCRIPTION
 
-=head1 CAVEATS
+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>.
 
-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.
+The MSSQL specific functionality is provided by
+L<DBIx::Class::Storage::DBI::MSSQL>.
 
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
+=head1 AUTHOR
 
-=head1 AUTHORS
-
-Brandon L Black <blblack@gmail.com>
-
-Justin Hunter <justin.d.hunter@gmail.com>
+See L<DBIx::Class/CONTRIBUTORS>.
 
 =head1 LICENSE