DBIx::Class::Storage::DBI::MSSQL
/;
use mro 'c3';
-use Carp::Clan qw/^DBIx::Class/;
+
+use DBIx::Class::Carp;
+use namespace::clean;
+
+=head1 NAME
+
+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 DESCRIPTION
+
+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>.
+
+The MSSQL specific functionality is provided by
+L<DBIx::Class::Storage::DBI::MSSQL>.
+
+=head1 METHODS
+
+=cut
+
+__PACKAGE__->datetime_parser_type(
+ 'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::DateTime::Format'
+);
sub _rebless {
my $self = shift;
return if ref $self ne __PACKAGE__;
if (not $self->_use_typeless_placeholders) {
+ carp_once <<'EOF' unless $ENV{DBIC_MSSQL_FREETDS_LOWVER_NOWARN};
+Placeholders do not seem to be supported in your configuration of
+DBD::Sybase/FreeTDS.
+
+This means you are taking a large performance hit, as caching of prepared
+statements is disabled.
+
+Make sure to configure your server with "tds version" of 8.0 or 7.0 in
+/etc/freetds/freetds.conf .
+
+To turn off this warning, set the DBIC_MSSQL_FREETDS_LOWVER_NOWARN environment
+variable.
+EOF
require
DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars;
bless $self,
}
}
-sub _run_connection_actions {
+sub _init {
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 $self = shift;
+ # work around massively broken freetds versions after 0.82
+ # - explicitly no scope_identity
+ # - no sth caching
+ #
+ # warn about the fact as well, do not provide a mechanism to shut it up
+ if ($self->_using_freetds and (my $ver = $self->_using_freetds_version||999) > 0.82) {
+ carp_once(
+ "Your DBD::Sybase was compiled against buggy FreeTDS version $ver. "
+ . 'Statement caching does not work and will be disabled.'
+ );
- $self->_get_dbh->do('BEGIN TRAN');
+ $self->_identity_method('@@identity');
+ $self->_no_scope_identity_query(1);
+ $self->disable_sth_caching(1);
+ }
}
-sub _dbh_commit {
- my $self = shift;
- my $dbh = $self->_dbh
- or $self->throw_exception('cannot COMMIT on a disconnected handle');
- $dbh->do('COMMIT');
-}
+# invoked only if DBD::Sybase is compiled against FreeTDS
+sub _set_autocommit_stmt {
+ my ($self, $on) = @_;
-sub _dbh_rollback {
- my $self = shift;
- my $dbh = $self->_dbh
- or $self->throw_exception('cannot ROLLBACK on a disconnected handle');
- $dbh->do('ROLLBACK');
+ return 'SET IMPLICIT_TRANSACTIONS ' . ($on ? 'OFF' : 'ON');
}
sub _get_server_version {
=cut
-{
- my $old_dbd_warned = 0;
-
- sub connect_call_datetime_setup {
- my $self = shift;
- my $dbh = $self->_get_dbh;
-
- if ($dbh->can('syb_date_fmt')) {
- # amazingly, this works with FreeTDS
- $dbh->syb_date_fmt('ISO_strict');
- } elsif (not $old_dbd_warned) {
- carp "Your DBD::Sybase is too old to support ".
- "DBIx::Class::InflateColumn::DateTime, please upgrade!";
- $old_dbd_warned = 1;
- }
+sub connect_call_datetime_setup {
+ my $self = shift;
+ my $dbh = $self->_get_dbh;
+
+ if ($dbh->can('syb_date_fmt')) {
+ # amazingly, this works with FreeTDS
+ $dbh->syb_date_fmt('ISO_strict');
+ }
+ else{
+ carp_once
+ 'Your DBD::Sybase is too old to support '
+ . 'DBIx::Class::InflateColumn::DateTime, please upgrade!';
}
}
-sub datetime_parser_type {
- 'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::DateTime::Format'
-}
package # hide from PAUSE
DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::DateTime::Format;
my $datetime_parse_format = '%Y-%m-%dT%H:%M:%S.%3NZ';
-my $datetime_format_format = '%Y-%m-%d %H:%M:%S.%3N'; # %F %T
+my $datetime_format_format = '%Y-%m-%d %H:%M:%S.%3N'; # %F %T
my ($datetime_parser, $datetime_formatter);
1;
-=head1 NAME
-
-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 DESCRIPTION
-
-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>.
-
-The MSSQL specific functionality is provided by
-L<DBIx::Class::Storage::DBI::MSSQL>.
-
=head1 AUTHOR
See L<DBIx::Class/CONTRIBUTORS>.