use strict;
use warnings;
+use Try::Tiny;
-use Class::C3;
use base qw/DBIx::Class::Storage::DBI/;
-use Carp::Clan qw/^DBIx::Class/;
+=head1 NAME
+
+DBIx::Class::Storage::DBI::Sybase - Base class for drivers using
+L<DBD::Sybase>
+
+=head1 DESCRIPTION
+
+This is the base class/dispatcher for Storage's designed to work with
+L<DBD::Sybase>
+
+=head1 METHODS
+
+=cut
sub _rebless {
my $self = shift;
- if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') {
- my $dbtype = eval {
- @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
- } || '';
+ my $dbtype;
+ try {
+ $dbtype = @{$self->_get_dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
+ } catch {
+ $self->throw_exception("Unable to estable connection to determine database type: $_")
+ };
- my $exception = $@;
+ if ($dbtype) {
$dbtype =~ s/\W/_/gi;
- my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
- if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
+ # saner class name
+ $dbtype = 'ASE' if $dbtype eq 'SQL_Server';
+
+ my $subclass = __PACKAGE__ . "::$dbtype";
+ if ($self->load_optional_class($subclass)) {
bless $self, $subclass;
$self->_rebless;
- } else {
- # real Sybase
- if (not $self->dbh->{syb_dynamic_supported}) {
- bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars';
- $self->_rebless;
- }
- $self->connect_call_datetime_setup;
}
}
}
-sub _populate_dbh {
+sub _ping {
my $self = shift;
- $self->next::method(@_);
- $self->connect_call_datetime_setup;
- 1;
-}
-
-{
- my $old_dbd_warned = 0;
-=head2 connect_call_datetime_setup
-
-Used as:
-
- on_connect_call => 'datetime_setup'
-
-In L<DBIx::Class::Storage::DBI/connect_info> to set:
-
- $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
- $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080
-
-On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using
-L<DateTime::Format::Sybase>, which you will need to install.
-
-This works for both C<DATETIME> and C<SMALLDATETIME> columns, although
-C<SMALLDATETIME> columns only have minute precision.
-
-=cut
-
- sub connect_call_datetime_setup {
- my $self = shift;
- my $dbh = $self->_dbh;
-
- if ($dbh->can('syb_date_fmt')) {
- $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;
- }
+ my $dbh = $self->_dbh or return 0;
- $dbh->do('set dateformat mdy');
+ local $dbh->{RaiseError} = 1;
+ local $dbh->{PrintError} = 0;
- 1;
+ if ($dbh->{syb_no_child_con}) {
+# if extra connections are not allowed, then ->ping is reliable
+ return try { $dbh->ping } catch { 0; };
}
-}
-
-sub _dbh_last_insert_id {
- my ($self, $dbh, $source, $col) = @_;
- # sorry, there's no other way!
- my $sth = $dbh->prepare_cached("select max($col) from ".$source->from);
- return ($dbh->selectrow_array($sth))[0];
+ return try {
+# XXX if the main connection goes stale, does opening another for this statement
+# really determine anything?
+ $dbh->do('select 1');
+ 1;
+ } catch {
+ 0;
+ };
}
-sub count {
+sub _set_max_connect {
my $self = shift;
- my ($source, $attrs) = @_;
-
- if (not exists $attrs->{rows}) {
- return $self->next::method(@_);
- }
+ my $val = shift || 256;
- my $offset = $attrs->{offset} || 0;
- my $total = $attrs->{rows} + $offset;
+ my $dsn = $self->_dbi_connect_info->[0];
- my $new_attrs = $self->_copy_attributes_for_count($source, $attrs);
+ return if ref($dsn) eq 'CODE';
- my $first_pk = ($source->primary_columns)[0];
-
- $new_attrs->{select} = $first_pk ? "me.$first_pk" : 1;
+ if ($dsn !~ /maxConnect=/) {
+ $self->_dbi_connect_info->[0] = "$dsn;maxConnect=$val";
+ my $connected = defined $self->_dbh;
+ $self->disconnect;
+ $self->ensure_connected if $connected;
+ }
+}
- my $tmp_rs = $source->resultset_class->new($source, $new_attrs);
+=head2 using_freetds
- $self->dbh->{syb_rowcount} = $total;
+Whether or not L<DBD::Sybase> was compiled against FreeTDS. If false, it means
+the Sybase OpenClient libraries were used.
- my $count = 0;
- $count++ while $tmp_rs->cursor->next;
+=cut
- $self->dbh->{syb_rowcount} = 0;
+sub using_freetds {
+ my $self = shift;
- return $count - $offset;
+ return $self->_get_dbh->{syb_oc_version} =~ /freetds/i;
}
-sub datetime_parser_type { "DateTime::Format::Sybase" }
+=head2 set_textsize
-1;
-
-=head1 NAME
-
-DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
-
-=head1 SYNOPSIS
+When using FreeTDS and/or MSSQL, C<< $dbh->{LongReadLen} >> is not available,
+use this function instead. It does:
-This subclass supports L<DBD::Sybase> for real Sybase databases. If you are
-using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to
-L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
+ $dbh->do("SET TEXTSIZE $bytes");
-=head1 DESCRIPTION
+Takes the number of bytes, or uses the C<LongReadLen> value from your
+L<connect_info|DBIx::Class::Storage::DBI/connect_info> if omitted, lastly falls
+back to the C<32768> which is the L<DBD::Sybase> default.
-If your version of Sybase does not support placeholders, then your storage
-will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can
-also enable that driver explicitly, see the documentation for more details.
+=cut
-With this driver there is unfortunately no way to get the C<last_insert_id>
-without doing a C<select max(col)>.
+sub set_textsize {
+ my $self = shift;
+ my $text_size =
+ shift
+ ||
+ try { $self->_dbi_connect_info->[-1]->{LongReadLen} }
+ ||
+ 32768; # the DBD::Sybase default
-But your queries will be cached.
+ return unless defined $text_size;
-=head1 DATES
+ $self->_dbh->do("SET TEXTSIZE $text_size");
+}
-See L</connect_call_datetime_setup> to setup date formats
-for L<DBIx::Class::InflateColumn::DateTime>.
+1;
=head1 AUTHORS
You may distribute this code under the same terms as Perl itself.
=cut
-# vim:sts=2 sw=2:
projects / dbsrgits/DBIx-Class.git / blobdiff