Merge 'normalize_connect_info' into 'trunk'

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Storage / DBI / Sybase.pm

diff --git a/lib/DBIx/Class/Storage/DBI/Sybase.pm b/lib/DBIx/Class/Storage/DBI/Sybase.pm
index 0a2cfb8..77b77e2 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/Sybase.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase.pm
@@ -3,57 +3,127 @@ package DBIx::Class::Storage::DBI::Sybase;
 use strict;
 use warnings;
 
-use base qw/
-    DBIx::Class::Storage::DBI::Sybase::Base
-    DBIx::Class::Storage::DBI::NoBindVars
-/;
-use mro 'c3';
+use base qw/DBIx::Class::Storage::DBI/;
+
+=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;
-
-    my $dbtype = eval { @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] };
-    unless ( $@ ) {
-        $dbtype =~ s/\W/_/gi;
-        my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
-        if ($self->load_optional_class($subclass) && !$self->isa($subclass)) {
-            bless $self, $subclass;
-            $self->_rebless;
-        }
+  my $self = shift;
+
+  my $dbtype = eval {
+    @{$self->_get_dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
+  };
+
+  $self->throw_exception("Unable to estable connection to determine database type: $@")
+    if $@;
+
+  if ($dbtype) {
+    $dbtype =~ s/\W/_/gi;
+
+    # 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;
     }
+  }
 }
 
-sub _dbh_last_insert_id {
-    my ($self, $dbh, $source, $col) = @_;
-    return ($dbh->selectrow_array('select @@identity'))[0];
+sub _ping {
+  my $self = shift;
+
+  my $dbh = $self->_dbh or return 0;
+
+  local $dbh->{RaiseError} = 1;
+  local $dbh->{PrintError} = 0;
+
+  if ($dbh->{syb_no_child_con}) {
+# if extra connections are not allowed, then ->ping is reliable
+    my $ping = eval { $dbh->ping };
+    return $@ ? 0 : $ping;
+  }
+
+  eval {
+# XXX if the main connection goes stale, does opening another for this statement
+# really determine anything?
+    $dbh->do('select 1');
+  };
+
+  return $@ ? 0 : 1;
 }
 
-1;
+sub _set_max_connect {
+  my $self = shift;
+  my $val  = shift || 256;
 
-=head1 NAME
+  my $dsn = $self->_dbi_connect_info->[0];
 
-DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
+  return if ref($dsn) eq 'CODE';
 
-=head1 SYNOPSIS
+  if ($dsn !~ /maxConnect=/) {
+    $self->_dbi_connect_info->[0] = "$dsn;maxConnect=$val";
+    my $connected = defined $self->_dbh;
+    $self->disconnect;
+    $self->ensure_connected if $connected;
+  }
+}
 
-This subclass supports L<DBD::Sybase> for real Sybase databases.  If
-you are using an MSSQL database via L<DBD::Sybase>, see
-L<DBIx::Class::Storage::DBI::Sybase::MSSQL>.
+=head2 using_freetds
 
-=head1 CAVEATS
+Whether or not L<DBD::Sybase> was compiled against FreeTDS. If false, it means
+the Sybase OpenClient libraries were used.
 
-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.
+=cut
 
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
+sub using_freetds {
+  my $self = shift;
 
-=head1 AUTHORS
+  return $self->_get_dbh->{syb_oc_version} =~ /freetds/i;
+}
+
+=head2 set_textsize
+
+When using FreeTDS and/or MSSQL, C<< $dbh->{LongReadLen} >> is not available,
+use this function instead. It does:
+
+  $dbh->do("SET TEXTSIZE $bytes");
+
+Takes the number of bytes, or uses the C<LongReadLen> value from your
+L<DBIx::Class/connect_info> if omitted, lastly falls back to the C<32768> which
+is the L<DBD::Sybase> default.
 
-Brandon L Black <blblack@gmail.com>
+=cut
+
+sub set_textsize {
+  my $self = shift;
+  my $text_size = shift ||
+    eval { $self->_dbi_connect_info->[-1]->{LongReadLen} } ||
+    32768; # the DBD::Sybase default
+
+  return unless defined $text_size;
+
+  $self->_dbh->do("SET TEXTSIZE $text_size");
+}
+
+1;
+
+=head1 AUTHORS
 
-Justin Hunter <justin.d.hunter@gmail.com>
+See L<DBIx::Class/CONTRIBUTORS>.
 
 =head1 LICENSE