use warnings;
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::Sybase::Base
+ DBIx::Class::Storage::DBI::MSSQL
/;
+use mro 'c3';
+
+sub _rebless {
+ my $self = shift;
+ my $dbh = $self->_dbh;
+
+ my ($placeholders_supported) = eval {
+# There's also $dbh->{syb_dynamic_supported} but it can be inaccurate for this
+# purpose.
+ local $dbh->{PrintError} = 0;
+ $dbh->selectrow_array('select ?', {}, 1);
+ };
+
+ if (not $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