Try::Tiny conversion finished

[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 6ee1e80..9b1214c 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/Sybase.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase.pm
@@ -2,74 +2,132 @@ package DBIx::Class::Storage::DBI::Sybase;
 
 use strict;
 use warnings;
+use Try::Tiny;
 
-use base qw/DBIx::Class::Storage::DBI::NoBindVars/;
+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;
+  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: $_")
+  };
+
+  if ($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;
 
-my $noquote = {
-    int => qr/^ \-? \d+ $/x,
-    integer => qr/^ \-? \d+ $/x,
+  if ($dbh->{syb_no_child_con}) {
+# if extra connections are not allowed, then ->ping is reliable
+    return try { $dbh->ping } catch { 0; };
+  }
 
-    # TODO maybe need to add float/real/etc
-};
+  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 should_quote_data_type {
+sub _set_max_connect {
   my $self = shift;
-  my ($type, $value) = @_;
+  my $val  = shift || 256;
+
+  my $dsn = $self->_dbi_connect_info->[0];
 
-  return $self->next::method(@_) if not defined $value;
+  return if ref($dsn) eq 'CODE';
 
-  if (my $re = $noquote->{$type}) {
-    return 0 if $value =~ $re;
+  if ($dsn !~ /maxConnect=/) {
+    $self->_dbi_connect_info->[0] = "$dsn;maxConnect=$val";
+    my $connected = defined $self->_dbh;
+    $self->disconnect;
+    $self->ensure_connected if $connected;
   }
+}
+
+=head2 using_freetds
+
+Whether or not L<DBD::Sybase> was compiled against FreeTDS. If false, it means
+the Sybase OpenClient libraries were used.
+
+=cut
+
+sub using_freetds {
+  my $self = shift;
 
-  return $self->next::method(@_);
+  return $self->_get_dbh->{syb_oc_version} =~ /freetds/i;
 }
 
-1;
+=head2 set_textsize
 
-=head1 NAME
+When using FreeTDS and/or MSSQL, C<< $dbh->{LongReadLen} >> is not available,
+use this function instead. It does:
 
-DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
+  $dbh->do("SET TEXTSIZE $bytes");
 
-=head1 SYNOPSIS
+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.
 
-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>.
+=cut
 
-=head1 CAVEATS
+sub set_textsize {
+  my $self = shift;
+  my $text_size =
+    shift
+      ||
+    try { $self->_dbi_connect_info->[-1]->{LongReadLen} }
+      ||
+    32768; # the DBD::Sybase default
 
-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.
+  return unless defined $text_size;
 
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
+  $self->_dbh->do("SET TEXTSIZE $text_size");
+}
 
-=head1 AUTHORS
+1;
 
-Brandon L Black <blblack@gmail.com>
+=head1 AUTHORS
 
-Justin Hunter <justin.d.hunter@gmail.com>
+See L<DBIx::Class/CONTRIBUTORS>.
 
 =head1 LICENSE