use base qw/DBIx::Class::Storage::DBI::MSSQL/;
use mro 'c3';
-
-use List::Util();
-use Scalar::Util ();
+use Scalar::Util 'reftype';
use Try::Tiny;
+use Carp::Clan qw/^DBIx::Class/;
use namespace::clean;
__PACKAGE__->mk_group_accessors(simple => qw/
Most of the functionality is provided from the superclass
L<DBIx::Class::Storage::DBI::MSSQL>.
+=head1 USAGE NOTES
+
+=head2 Basic Linux Setup (Debian)
+
+ sudo aptitude install tdsodbc libdbd-odbc-perl unixodbc
+
+In case it is not already there put the following in C</etc/odbcinst.ini>:
+
+ [FreeTDS]
+ Description = FreeTDS
+ Driver = /usr/lib/odbc/libtdsodbc.so
+ Setup = /usr/lib/odbc/libtdsS.so
+ UsageCount = 1
+
+Set your C<$dsn> in L<connect_info|DBIx::Class::Storage::DBI/connect_info> as follows:
+
+ dbi:ODBC:server=<my.host.name>;port=1433;driver=FreeTDS;tds_version=8.0
+
+If you use the EasySoft driver (L<http://www.easysoft.com>):
+
+ dbi:ODBC:server=<my.host.name>;port=1433;driver=Easysoft ODBC-SQL Server
+
+=head2 Basic Windows Setup
+
+Use the following C<$dsn> for the Microsoft ODBC driver:
+
+ dbi:ODBC:driver={SQL Server};server=SERVER\SQL_SERVER_INSTANCE_NAME
+
+And for the Native Client:
+
+ dbi:ODBC:driver={SQL Server Native Client 10.0};server=SERVER\SQL_SERVER_INSTANCE_NAME
+
+Go into Control Panel -> System and Security -> Administrative Tools -> Data
+Sources (ODBC) to check driver names and to set up data sources.
+
+Use System DSNs, not User DSNs if you want to use DSNs.
+
+If you set up a DSN, use the following C<$dsn> for
+L<connect_info|DBIx::Class::Storage::DBI/connect_info>:
+
+ dbi:ODBC:dsn=MY_DSN
+
=head1 MULTIPLE ACTIVE STATEMENTS
The following options are alternative ways to enable concurrent executing
-statement support. Each has its own advantages and drawbacks.
+statement support. Each has its own advantages and drawbacks and works on
+different platforms. Read each section carefully.
+
+In order of preference, they are:
+
+=over 8
+
+=item * L</connect_call_use_mars>
+
+=item * L</connect_call_use_dynamic_cursors>
+
+=item * L</connect_call_use_server_cursors>
+
+=back
+
+=head1 METHODS
+
+=head2 connect_call_use_mars
+
+Use as:
+
+ on_connect_call => 'use_mars'
+
+Use to enable a feature of SQL Server 2005 and later, "Multiple Active Result
+Sets". See L<DBD::ODBC::FAQ/Does DBD::ODBC support Multiple Active Statements?>
+for more information.
+
+This does not work on FreeTDS drivers at the time of this writing, and only
+works with the Native Client, later versions of the Windows MS ODBC driver, and
+the Easysoft driver.
+
+=cut
+
+sub connect_call_use_mars {
+ my $self = shift;
+
+ my $dsn = $self->_dbi_connect_info->[0];
+
+ if (ref($dsn) eq 'CODE') {
+ $self->throw_exception('cannot change the DBI DSN on a CODE ref connect_info');
+ }
+
+ if ($dsn !~ /MARS_Connection=/) {
+ if ($self->using_freetds) {
+ $self->throw_exception('FreeTDS does not support MARS at the time of '
+ .'writing.');
+ }
+
+ if (exists $self->_server_info->{normalized_dbms_version} &&
+ $self->_server_info->{normalized_dbms_version} < 9) {
+ $self->throw_exception('SQL Server 2005 or later required to use MARS.');
+ }
+
+ if (my ($data_source) = $dsn =~ /^dbi:ODBC:([\w-]+)\z/i) { # prefix with DSN
+ warn "Bare DSN in ODBC connect string, rewriting as 'dsn=$data_source'"
+ ." for MARS\n";
+ $dsn = "dbi:ODBC:dsn=$data_source";
+ }
+
+ $self->_dbi_connect_info->[0] = "$dsn;MARS_Connection=Yes";
+ $self->disconnect;
+ $self->ensure_connected;
+ }
+}
+
+sub connect_call_use_MARS {
+ carp "'connect_call_use_MARS' has been deprecated, use "
+ ."'connect_call_use_mars' instead.";
+ shift->connect_call_use_mars(@_)
+}
=head2 connect_call_use_dynamic_cursors
my $dbi_attrs = $self->_dbi_connect_info->[-1];
- unless (ref($dbi_attrs) && Scalar::Util::reftype($dbi_attrs) eq 'HASH') {
+ unless (ref $dbi_attrs eq 'HASH') {
$dbi_attrs = {};
push @{ $self->_dbi_connect_info }, $dbi_attrs;
}
sub _init {
my $self = shift;
- no warnings qw/uninitialized/;
-
if (
ref($self->_dbi_connect_info->[0]) ne 'CODE'
&&
ref ($self->_dbi_connect_info->[-1]) eq 'HASH'
&&
- $self->_dbi_connect_info->[-1]{odbc_cursortype} == 2
+ ($self->_dbi_connect_info->[-1]{odbc_cursortype} || 0) > 1
) {
$self->_set_dynamic_cursors;
- return;
}
-
- $self->_using_dynamic_cursors(0);
+ else {
+ $self->_using_dynamic_cursors(0);
+ }
}
=head2 connect_call_use_server_cursors
B<WARNING>: this does not work on all versions of SQL Server, and may lock up
your database!
+At the time of writing, this option only works on Microsoft's Windows drivers,
+later versions of the ODBC driver and the Native Client driver.
+
=cut
sub connect_call_use_server_cursors {
my $self = shift;
my $sql_rowset_size = shift || 2;
+ if ($^O !~ /win32|cygwin/i) {
+ $self->throw_exception('Server cursors only work on Windows platforms at '
+ .'the time of writing.');
+ }
+
$self->_get_dbh->{odbc_SQL_ROWSET_SIZE} = $sql_rowset_size;
}
-=head2 connect_call_use_MARS
-
-Use as:
-
- on_connect_call => 'use_MARS'
+=head2 using_freetds
-Use to enable a feature of SQL Server 2005 and later, "Multiple Active Result
-Sets". See L<DBD::ODBC::FAQ/Does DBD::ODBC support Multiple Active Statements?>
-for more information.
-
-B<WARNING>: This has implications for the way transactions are handled.
+Tries to determine, to the best of our ability, whether or not you are using the
+FreeTDS driver with L<DBD::ODBC>.
=cut
-sub connect_call_use_MARS {
+sub using_freetds {
my $self = shift;
my $dsn = $self->_dbi_connect_info->[0];
- if (ref($dsn) eq 'CODE') {
- $self->throw_exception('cannot change the DBI DSN on a CODE ref connect_info');
- }
+ $dsn = '' if ref $dsn eq 'CODE';
- if ($dsn !~ /MARS_Connection=/) {
- $self->_dbi_connect_info->[0] = "$dsn;MARS_Connection=Yes";
- my $was_connected = defined $self->_dbh;
- $self->disconnect;
- $self->ensure_connected if $was_connected;
- }
+ my $dbh = $self->_get_dbh;
+
+ return 1 if $dsn =~ /driver=FreeTDS/i
+ || (try { $dbh->get_info(6) }||'') =~ /tdsodbc/i;
+
+ return 0;
}
1;