X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FSybase%2FNoBindVars.pm;h=7b59d0a95f136389b18249b0cce81b1f4336043a;hb=166c656193b56e08b472c675e92b9076aac03a53;hp=bb30d7a185b61a5d318983ba768115b2497689f9;hpb=0814e8043fb4dbad52bab9d77f5c9891feaa77d9;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/Sybase/NoBindVars.pm b/lib/DBIx/Class/Storage/DBI/Sybase/NoBindVars.pm
index bb30d7a..7b59d0a 100644
--- a/lib/DBIx/Class/Storage/DBI/Sybase/NoBindVars.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase/NoBindVars.pm
@@ -1,8 +1,106 @@
 package DBIx::Class::Storage::DBI::Sybase::NoBindVars;
 
+use Class::C3;
 use base qw/
   DBIx::Class::Storage::DBI::NoBindVars
   DBIx::Class::Storage::DBI::Sybase
 /;
+use List::Util ();
+use Scalar::Util ();
+
+sub _rebless {
+  my $self = shift;
+  $self->disable_sth_caching(1);
+  $self->insert_txn(0);
+}
+
+# this works when NOT using placeholders
+sub _fetch_identity_sql { 'SELECT @@IDENTITY' }
+
+my $number = sub { Scalar::Util::looks_like_number($_[0]) };
+
+my $decimal = sub { $_[0] =~ /^ [-+]? \d+ (?:\.\d*)? \z/x };
+
+my %noquote = (
+    int => sub { $_[0] =~ /^ [-+]? \d+ \z/x },
+    bit => => sub { $_[0] =~ /^[01]\z/ },
+    money => sub { $_[0] =~ /^\$ \d+ (?:\.\d*)? \z/x },
+    float => $number,
+    real => $number,
+    double => $number,
+    decimal => $decimal,
+    numeric => $decimal,
+);
+
+sub should_quote_value {
+  my $self = shift;
+  my ($type, $value) = @_;
+
+  return $self->next::method(@_) if not defined $value or not defined $type;
+
+  if (my $key = List::Util::first { $type =~ /$_/i } keys %noquote) {
+    return 0 if $noquote{$key}->($value);
+  } elsif ($self->is_datatype_numeric($type) && $number->($value)) {
+    return 0;
+  }
+
+## try to guess based on value
+#  elsif (not $type) {
+#    return 0 if $number->($value) || $noquote->{money}->($value);
+#  }
+
+  return $self->next::method(@_);
+}
+
+sub _prep_interpolated_value {
+  my ($self, $type, $value) = @_;
+
+  if ($type =~ /money/i && defined $value) {
+    # change a ^ not followed by \$ to a \$
+    $value =~ s/^ (?! \$) /\$/x;
+  }
+
+  return $value;
+}
 
 1;
+
+=head1 NAME
+
+DBIx::Class::Storage::DBI::Sybase::NoBindVars - Storage::DBI subclass for Sybase
+without placeholder support
+
+=head1 DESCRIPTION
+
+If you're using this driver than your version of Sybase, or the libraries you
+use to connect to it, do not support placeholders.
+
+You can also enable this driver explicitly using:
+
+  my $schema = SchemaClass->clone;
+  $schema->storage_type('::DBI::Sybase::NoBindVars');
+  $schema->connect($dsn, $user, $pass, \%opts);
+
+See the discussion in L<< DBD::Sybase/Using ? Placeholders & bind parameters to
+$sth->execute >> for details on the pros and cons of using placeholders.
+
+One advantage of not using placeholders is that C<select @@identity> will work
+for obtainging the last insert id of an C<IDENTITY> column, instead of having to
+do C<select max(col)> in a transaction as the base Sybase driver does.
+
+When using this driver, bind variables will be interpolated (properly quoted of
+course) into the SQL query itself, without using placeholders.
+
+The caching of prepared statements is also explicitly disabled, as the
+interpolation renders it useless.
+
+=head1 AUTHORS
+
+See L<DBIx::Class/CONTRIBUTORS>.
+
+=head1 LICENSE
+
+You may distribute this code under the same terms as Perl itself.
+
+=cut
+# vim:sts=2 sw=2: