use strict;
use warnings;
-use base qw/DBIx::Class::Storage::DBI::MSSQL/;
+use base qw/
+ DBIx::Class::Storage::DBI::ODBC
+ DBIx::Class::Storage::DBI::MSSQL
+/;
use mro 'c3';
use Scalar::Util 'reftype';
use Try::Tiny;
-use Carp::Clan qw/^DBIx::Class/;
+use DBIx::Class::Carp;
use namespace::clean;
__PACKAGE__->mk_group_accessors(simple => qw/
=head1 DESCRIPTION
This class implements support specific to Microsoft SQL Server over ODBC. It is
-loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it detects a
+loaded automatically by DBIx::Class::Storage::DBI::ODBC when it detects a
MSSQL back-end.
Most of the functionality is provided from the superclass
sudo aptitude install tdsodbc libdbd-odbc-perl unixodbc
-In case it is not already there put the following in C</etc/odbcinst.ini>:
+In case it is not already there put the following (adjust for non-64bit arch) in
+C</etc/odbcinst.ini>:
[FreeTDS]
Description = FreeTDS
- Driver = /usr/lib/odbc/libtdsodbc.so
- Setup = /usr/lib/odbc/libtdsS.so
+ Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
+ Setup = /usr/lib/x86_64-linux-gnu/odbc/libtdsS.so
UsageCount = 1
Set your C<$dsn> in L<connect_info|DBIx::Class::Storage::DBI/connect_info> as follows:
statement support. Each has its own advantages and drawbacks and works on
different platforms. Read each section carefully.
+For more details about using MAS in MSSQL over DBD::ODBC see this excellent
+document provided by EasySoft:
+L<http://www.easysoft.com/developer/languages/perl/multiple-active-statements.html>.
+
In order of preference, they are:
=over 8
}
if ($dsn !~ /MARS_Connection=/) {
- if ($self->using_freetds) {
+ if ($self->_using_freetds) {
$self->throw_exception('FreeTDS does not support MARS at the time of '
.'writing.');
}
}
if (my ($data_source) = $dsn =~ /^dbi:ODBC:([\w-]+)\z/i) { # prefix with DSN
- warn "Bare DSN in ODBC connect string, rewriting as 'dsn=$data_source'"
+ carp_unique "Bare DSN in ODBC connect string, rewriting as 'dsn=$data_source'"
." for MARS\n";
$dsn = "dbi:ODBC:dsn=$data_source";
}
Server 2005 and later will return erroneous results on tables which have an on
insert trigger that inserts into another table with an C<IDENTITY> column.
+B<WARNING:> on FreeTDS, changes made in one statement (e.g. an insert) may not
+be visible from a following statement (e.g. a select.)
+
+B<WARNING:> FreeTDS versions > 0.82 seem to have completely broken the ODBC
+protocol. DBIC will not allow dynamic cursor support with such versions to
+protect your data. Please hassle the authors of FreeTDS to act on the bugs that
+make their driver not overly usable with DBD::ODBC.
+
=cut
sub connect_call_use_dynamic_cursors {
my $self = shift;
- my $conn_info = $self->_dbi_connect_info;
+ if (($self->_dbic_connect_attributes->{odbc_cursortype} || 0) < 2) {
- if (ref($conn_info->[0]) eq 'CODE') {
- $self->throw_exception ('Cannot set DBI attributes on a CODE ref connect_info');
- }
+ my $dbi_inf = $self->_dbi_connect_info;
+
+ $self->throw_exception ('Cannot set DBI attributes on a CODE ref connect_info')
+ if ref($dbi_inf->[0]) eq 'CODE';
- if (
- ref($conn_info->[-1]) ne 'HASH'
- or
- ($conn_info->[-1]{odbc_cursortype}||0) < 2
- ) {
# reenter connection information with the attribute re-set
- $self->connect_info(
- @{$conn_info}[0,1,2],
- { %{$self->_dbix_connect_attributes}, odbc_cursortype => 2 },
- );
+ $dbi_inf->[3] = {} if @$dbi_inf <= 3;
+ $dbi_inf->[3]{odbc_cursortype} = 2;
+
+ $self->_dbi_connect_info($dbi_inf);
+
$self->disconnect; # resetting dbi attrs, so have to reconnect
$self->ensure_connected;
}
sub _run_connection_actions {
my $self = shift;
+ $self->next::method (@_);
+
# keep the dynamic_cursors_support and driver-state in sync
# on every reconnect
my $use_dyncursors = ($self->_dbic_connect_attributes->{odbc_cursortype} || 0) > 1;
$self->throw_exception (
'Your drivers do not seem to support dynamic cursors (odbc_cursortype => 2).'
. (
- $self->using_freetds
+ $self->_using_freetds
? ' If you are using FreeTDS, make sure to set tds_version to 8.0 or greater.'
: ''
)
}
}
- $self->next::method (@_);
+ $self->_no_scope_identity_query($self->_using_dynamic_cursors
+ ? $self->_using_freetds
+ : undef
+ );
+
+ # freetds is too damn broken, some fixups
+ if ($self->_using_freetds) {
+
+ # no dynamic cursors starting from 0.83
+ if ($self->_using_dynamic_cursors) {
+ my $fv = $self->_using_freetds_version || 999; # assume large if can't be determined
+ $self->throw_exception(
+ 'Dynamic cursors (odbc_cursortype => 2) are not supported with FreeTDS > 0.82 '
+ . "(you have $fv). Please hassle FreeTDS authors to fix the outstanding bugs in "
+ . 'their driver.'
+ ) if $fv > 0.82
+ }
+
+ # FreeTDS is too broken wrt execute_for_fetch batching
+ # just disable it outright until things quiet down
+ $self->_disable_odbc_array_ops;
+ }
}
=head2 connect_call_use_server_cursors
$self->_get_dbh->{odbc_SQL_ROWSET_SIZE} = $sql_rowset_size;
}
-=head2 using_freetds
-
-Tries to determine, to the best of our ability, whether or not you are using the
-FreeTDS driver with L<DBD::ODBC>.
-
-=cut
-
-sub using_freetds {
- my $self = shift;
-
- my $dsn = $self->_dbi_connect_info->[0];
-
- $dsn = '' if ref $dsn eq 'CODE';
-
- return 1 if $dsn =~ /driver=FreeTDS/i
- || ($self->_dbh_get_info(6)||'') =~ /tdsodbc/i;
-
- return 0;
-}
-
1;
=head1 AUTHOR
-See L<DBIx::Class/CONTRIBUTORS>.
+See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>.
=head1 LICENSE
You may distribute this code under the same terms as Perl itself.
=cut
-# vim: sw=2 sts=2
+# vim:sw=2 sts=2 et
projects / dbsrgits/DBIx-Class.git / blobdiff