X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FSybase%2FMicrosoft_SQL_Server.pm;h=ea03b05463dbb3d85e3d6fc53498991868a0b100;hb=e43288721573f6b73a16e1340d8a533e04642d6f;hp=ad5b63dc89a5422b34d8de084f242f740d3f6c5a;hpb=1bedffac4e779d23862bb364bb0b28bb0711610e;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm b/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm
index ad5b63d..ea03b05 100644
--- a/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase/Microsoft_SQL_Server.pm
@@ -4,31 +4,13 @@ use strict;
 use warnings;
 
 use base qw/
-  DBIx::Class::Storage::DBI::Sybase::Base
+  DBIx::Class::Storage::DBI::Sybase
   DBIx::Class::Storage::DBI::MSSQL
 /;
 use mro 'c3';
 
-sub _rebless {
-  my $self = shift;
-  my $dbh  = $self->_get_dbh;
-
-  if (not $self->_typeless_placeholders_supported) {
-    bless $self,
-      'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars';
-    $self->_rebless;
-  }
-
-# LongReadLen doesn't work with MSSQL through DBD::Sybase, and the default is
-# huge on some versions of SQL server and can cause memory problems, so we
-# fix it up here.
-  my $text_size = eval { $self->_dbi_connect_info->[-1]->{LongReadLen} } ||
-    32768; # the DBD::Sybase default
-
-  $dbh->do("set textsize $text_size");
-}
-
-1;
+use DBIx::Class::Carp;
+use namespace::clean;
 
 =head1 NAME
 
@@ -49,12 +31,158 @@ L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars>.
 The MSSQL specific functionality is provided by
 L<DBIx::Class::Storage::DBI::MSSQL>.
 
-=head1 AUTHOR
+=head1 METHODS
+
+=cut
+
+__PACKAGE__->datetime_parser_type(
+  'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::DateTime::Format'
+);
+
+sub _rebless {
+  my $self = shift;
+  my $dbh  = $self->_get_dbh;
+
+  return if ref $self ne __PACKAGE__;
+  if (not $self->_use_typeless_placeholders) {
+    carp_once <<'EOF' unless $ENV{DBIC_MSSQL_FREETDS_LOWVER_NOWARN};
+Placeholders do not seem to be supported in your configuration of
+DBD::Sybase/FreeTDS.
+
+This means you are taking a large performance hit, as caching of prepared
+statements is disabled.
+
+Make sure to configure your server with "tds version" of 8.0 or 7.0 in
+/etc/freetds/freetds.conf .
+
+To turn off this warning, set the DBIC_MSSQL_FREETDS_LOWVER_NOWARN environment
+variable.
+EOF
+    require
+      DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars;
+    bless $self,
+      'DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::NoBindVars';
+    $self->_rebless;
+  }
+}
+
+sub _init {
+  my $self = shift;
 
-See L<DBIx::Class/CONTRIBUTORS>.
+  $self->next::method(@_);
+
+  # work around massively broken freetds versions after 0.82
+  # - explicitly no scope_identity
+  # - no sth caching
+  #
+  # warn about the fact as well, do not provide a mechanism to shut it up
+  if ($self->_using_freetds and (my $ver = $self->_using_freetds_version||999) > 0.82) {
+    carp_once(
+      "Your DBD::Sybase was compiled against buggy FreeTDS version $ver. "
+    . 'Statement caching does not work and will be disabled.'
+    );
+
+    $self->_identity_method('@@identity');
+    $self->_no_scope_identity_query(1);
+    $self->disable_sth_caching(1);
+  }
+}
+
+# invoked only if DBD::Sybase is compiled against FreeTDS
+sub _set_autocommit_stmt {
+  my ($self, $on) = @_;
 
-=head1 LICENSE
+  return 'SET IMPLICIT_TRANSACTIONS ' . ($on ? 'OFF' : 'ON');
+}
 
-You may distribute this code under the same terms as Perl itself.
+sub _get_server_version {
+  my $self = shift;
+
+  my $product_version = $self->_get_dbh->selectrow_hashref('master.dbo.xp_msver ProductVersion');
+
+  if ((my $version = $product_version->{Character_Value}) =~ /^(\d+)\./) {
+    return $version;
+  }
+  else {
+    $self->throw_exception(
+      "MSSQL Version Retrieval Failed, Your ProductVersion's Character_Value is missing or malformed!"
+    );
+  }
+}
+
+=head2 connect_call_datetime_setup
+
+Used as:
+
+  on_connect_call => 'datetime_setup'
+
+In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set:
+
+  $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
+
+On connection for use with L<DBIx::Class::InflateColumn::DateTime>
+
+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 = $self->_get_dbh;
+
+  if ($dbh->can('syb_date_fmt')) {
+    # amazingly, this works with FreeTDS
+    $dbh->syb_date_fmt('ISO_strict');
+  }
+  else{
+    carp_once
+      'Your DBD::Sybase is too old to support '
+    . 'DBIx::Class::InflateColumn::DateTime, please upgrade!';
+  }
+}
+
+
+package # hide from PAUSE
+  DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server::DateTime::Format;
+
+my $datetime_parse_format  = '%Y-%m-%dT%H:%M:%S.%3NZ';
+my $datetime_format_format = '%Y-%m-%d %H:%M:%S.%3N'; # %F %T
+
+my ($datetime_parser, $datetime_formatter);
+
+sub parse_datetime {
+  shift;
+  require DateTime::Format::Strptime;
+  $datetime_parser ||= DateTime::Format::Strptime->new(
+    pattern  => $datetime_parse_format,
+    on_error => 'croak',
+  );
+  return $datetime_parser->parse_datetime(shift);
+}
+
+sub format_datetime {
+  shift;
+  require DateTime::Format::Strptime;
+  $datetime_formatter ||= DateTime::Format::Strptime->new(
+    pattern  => $datetime_format_format,
+    on_error => 'croak',
+  );
+  return $datetime_formatter->format_datetime(shift);
+}
+
+=head1 FURTHER QUESTIONS?
+
+Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
+
+=head1 COPYRIGHT AND LICENSE
+
+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>.
+
+=cut
+
+1;
+