Protect DBIC as best we can from the failure mode in 7cb35852

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

diff --git a/lib/DBIx/Class/Storage/DBI/SQLAnywhere.pm b/lib/DBIx/Class/Storage/DBI/SQLAnywhere.pm
index 728220f..3d054bb 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/SQLAnywhere.pm
+++ b/lib/DBIx/Class/Storage/DBI/SQLAnywhere.pm
@@ -5,20 +5,29 @@ use warnings;
 use base qw/DBIx::Class::Storage::DBI::UniqueIdentifier/;
 use mro 'c3';
 use List::Util 'first';
+use DBIx::Class::_Util 'dbic_internal_try';
 use Try::Tiny;
 use namespace::clean;
 
 __PACKAGE__->mk_group_accessors(simple => qw/_identity/);
 __PACKAGE__->sql_limit_dialect ('RowNumberOver');
+__PACKAGE__->sql_quote_char ('"');
+
+__PACKAGE__->new_guid('UUIDTOSTR(NEWID())');
+
+# default to the UUID decoding cursor, overridable by the user
+__PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::SQLAnywhere::Cursor');
 
 =head1 NAME
 
-DBIx::Class::Storage::DBI::SQLAnywhere - Driver for Sybase SQL Anywhere
+DBIx::Class::Storage::DBI::SQLAnywhere - Driver for SQL Anywhere
 
 =head1 DESCRIPTION
 
-This class implements autoincrements for Sybase SQL Anywhere and provides
-L<DBIx::Class::InflateColumn::DateTime> support.
+This class implements autoincrements for SQL Anywhere and provides
+L<DBIx::Class::InflateColumn::DateTime> support and support for the
+C<uniqueidentifier> type (via
+L<DBIx::Class::Storage::DBI::SQLAnywhere::Cursor>.)
 
 You need the C<DBD::SQLAnywhere> driver that comes with the SQL Anywhere
 distribution, B<NOT> the one on CPAN. It is usually under a path such as:
@@ -35,20 +44,19 @@ Recommended L<connect_info|DBIx::Class::Storage::DBI/connect_info> settings:
 
 sub last_insert_id { shift->_identity }
 
-sub _new_uuid { 'UUIDTOSTR(NEWID())' }
-
 sub _prefetch_autovalues {
   my $self = shift;
-  my ($source, $to_insert) = @_;
+  my ($source, $colinfo, $to_insert) = @_;
 
   my $values = $self->next::method(@_);
 
-  my $colinfo = $source->columns_info;
-
   my $identity_col =
     first { $colinfo->{$_}{is_auto_increment} } keys %$colinfo;
 
 # user might have an identity PK without is_auto_increment
+#
+# FIXME we probably should not have supported the above, see what
+# does it take to move away from it
   if (not $identity_col) {
     foreach my $pk_col ($source->primary_columns) {
       if (
@@ -69,7 +77,7 @@ sub _prefetch_autovalues {
     my $table_name = $source->from;
     $table_name    = $$table_name if ref $table_name;
 
-    my ($identity) = try {
+    my ($identity) = dbic_internal_try {
       $dbh->selectrow_array("SELECT GET_IDENTITY('$table_name')")
     };
 
@@ -82,9 +90,28 @@ sub _prefetch_autovalues {
   return $values;
 }
 
-# convert UUIDs to strings in selects
-sub _select_args {
+sub _uuid_to_str {
+  my ($self, $data) = @_;
+
+  $data = unpack 'H*', $data;
+
+  for my $pos (8, 13, 18, 23) {
+    substr($data, $pos, 0) = '-';
+  }
+
+  return $data;
+}
+
+# select_single does not invoke a cursor object at all, hence UUID decoding happens
+# here if the proper cursor class is set
+sub select_single {
   my $self = shift;
+
+  my @row = $self->next::method(@_);
+
+  return @row
+    unless $self->cursor_class->isa('DBIx::Class::Storage::DBI::SQLAnywhere::Cursor');
+
   my ($ident, $select) = @_;
 
   my $col_info = $self->_resolve_column_info($ident);
@@ -94,29 +121,33 @@ sub _select_args {
 
     next if ref $selected;
 
-    my $data_type = $col_info->{$selected}{data_type};
+    my $data_type = $col_info->{$selected}{data_type}
+      or next;
 
-    if ($data_type && lc($data_type) eq 'uniqueidentifier') {
-      $select->[$select_idx] = { UUIDTOSTR => $selected };
+    if ($self->_is_guid_type($data_type)) {
+      my $returned = $row[$select_idx];
+
+      if (length $returned == 16) {
+        $row[$select_idx] = $self->_uuid_to_str($returned);
+      }
     }
   }
 
-  return $self->next::method(@_);
+  return @row;
 }
 
 # this sub stolen from MSSQL
 
 sub build_datetime_parser {
   my $self = shift;
-  my $type = "DateTime::Format::Strptime";
-  try {
-    eval "require ${type}"
+  dbic_internal_try {
+    require DateTime::Format::Strptime;
   }
   catch {
-    $self->throw_exception("Couldn't load ${type}: $_");
+    $self->throw_exception("Couldn't load DateTime::Format::Strptime: $_");
   };
 
-  return $type->new( pattern => '%Y-%m-%d %H:%M:%S.%6N' );
+  return DateTime::Format::Strptime->new( pattern => '%Y-%m-%d %H:%M:%S.%6N' );
 }
 
 =head2 connect_call_datetime_setup
@@ -151,19 +182,19 @@ sub connect_call_datetime_setup {
   );
 }
 
-sub _svp_begin {
+sub _exec_svp_begin {
     my ($self, $name) = @_;
 
-    $self->_get_dbh->do("SAVEPOINT $name");
+    $self->_dbh->do("SAVEPOINT $name");
 }
 
 # can't release savepoints that have been rolled back
-sub _svp_release { 1 }
+sub _exec_svp_release { 1 }
 
-sub _svp_rollback {
+sub _exec_svp_rollback {
     my ($self, $name) = @_;
 
-    $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name")
+    $self->_dbh->do("ROLLBACK TO SAVEPOINT $name")
 }
 
 1;
@@ -181,12 +212,13 @@ be turned off (or increased) by the DBA by executing:
 
 Highly recommended.
 
-=head1 AUTHOR
+=head1 FURTHER QUESTIONS?
 
-See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>.
+Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
 
-=head1 LICENSE
+=head1 COPYRIGHT AND LICENSE
 
-You may distribute this code under the same terms as Perl itself.
-
-=cut
+This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
+by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
+redistribute it and/or modify it under the same terms as the
+L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.