X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FMSSQL.pm;h=9cde4b9c172256420427b636123678df01317a48;hb=d5dedbd62928f65a9071b4d9b6d56c6b663a073b;hp=38c615b146b32f0fc56cb9f65e102e16fad2f86d;hpb=aca481d85207323845bc076e58d5de52f3a8458f;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/MSSQL.pm b/lib/DBIx/Class/Storage/DBI/MSSQL.pm
index 38c615b..9cde4b9 100644
--- a/lib/DBIx/Class/Storage/DBI/MSSQL.pm
+++ b/lib/DBIx/Class/Storage/DBI/MSSQL.pm
@@ -5,14 +5,15 @@ use warnings;
 
 use base qw/DBIx::Class::Storage::DBI::UniqueIdentifier/;
 use mro 'c3';
-
-use List::Util();
+use Try::Tiny;
+use List::Util 'first';
+use namespace::clean;
 
 __PACKAGE__->mk_group_accessors(simple => qw/
   _identity _identity_method
 /);
 
-__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MSSQL');
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::MSSQL');
 
 sub _set_identity_insert {
   my ($self, $table) = @_;
@@ -23,13 +24,13 @@ sub _set_identity_insert {
   );
 
   my $dbh = $self->_get_dbh;
-  eval { $dbh->do ($sql) };
-  if ($@) {
+  try { $dbh->do ($sql) }
+  catch {
     $self->throw_exception (sprintf "Error executing '%s': %s",
       $sql,
       $dbh->errstr,
     );
-  }
+  };
 }
 
 sub _unset_identity_insert {
@@ -48,12 +49,8 @@ sub insert_bulk {
   my $self = shift;
   my ($source, $cols, $data) = @_;
 
-  my $is_identity_insert = (List::Util::first
-      { $source->column_info ($_)->{is_auto_increment} }
-      (@{$cols})
-  )
-     ? 1
-     : 0;
+  my $is_identity_insert =
+    (first { $source->column_info ($_)->{is_auto_increment} } @{$cols}) ? 1 : 0;
 
   if ($is_identity_insert) {
      $self->_set_identity_insert ($source->name);
@@ -72,9 +69,8 @@ sub insert {
 
   my $supplied_col_info = $self->_resolve_column_info($source, [keys %$to_insert] );
 
-  my $is_identity_insert = (List::Util::first { $_->{is_auto_increment} } (values %$supplied_col_info) )
-     ? 1
-     : 0;
+  my $is_identity_insert =
+    (first { $_->{is_auto_increment} } values %$supplied_col_info) ? 1 : 0;
 
   if ($is_identity_insert) {
      $self->_set_identity_insert ($source->name);
@@ -128,7 +124,7 @@ sub _execute {
 
     # this should bring back the result of SELECT SCOPE_IDENTITY() we tacked
     # on in _prep_for_execute above
-    my ($identity) = eval { $sth->fetchrow_array };
+    my ($identity) = try { $sth->fetchrow_array };
 
     # SCOPE_IDENTITY failed, but we can do something else
     if ( (! $identity) && $self->_identity_method) {
@@ -148,7 +144,7 @@ sub last_insert_id { shift->_identity }
 
 #
 # MSSQL is retarded wrt ordered subselects. One needs to add a TOP
-# to *all* subqueries, but one also can't use TOP 100 PERCENT
+# to *all* subqueries, but one also *can't* use TOP 100 PERCENT
 # http://sqladvice.com/forums/permalink/18496/22931/ShowThread.aspx#22931
 #
 sub _select_args_to_query {
@@ -161,12 +157,12 @@ sub _select_args_to_query {
   if (
     $sql !~ /^ \s* SELECT \s+ TOP \s+ \d+ \s+ /xi
       &&
-    scalar $self->_parse_order_by ($attrs->{order_by}) 
+    scalar $self->_parse_order_by ($attrs->{order_by})
   ) {
     $self->throw_exception(
       'An ordered subselect encountered - this is not safe! Please see "Ordered Subselects" in DBIx::Class::Storage::DBI::MSSQL
     ') unless $attrs->{unsafe_subselect_ok};
-    my $max = 2 ** 32;
+    my $max = $self->sql_maker->__max_int;
     $sql =~ s/^ \s* SELECT \s/SELECT TOP $max /xi;
   }
 
@@ -196,28 +192,30 @@ sub _svp_rollback {
 
 sub datetime_parser_type {
   'DBIx::Class::Storage::DBI::MSSQL::DateTime::Format'
-} 
+}
 
 sub sqlt_type { 'SQLServer' }
 
-sub sql_maker {
+sub sql_limit_dialect {
   my $self = shift;
 
-  unless ($self->_sql_maker) {
-    unless ($self->{_sql_maker_opts}{limit_dialect}) {
-
-      my $version = $self->_server_info->{normalized_dbms_version} || 0;
+  my $supports_rno = 0;
 
-      $self->{_sql_maker_opts} = {
-        limit_dialect => ($version >= 9 ? 'RowNumberOver' : 'Top'),
-        %{$self->{_sql_maker_opts}||{}}
-      };
-    }
-
-    my $maker = $self->next::method (@_);
+  if (exists $self->_server_info->{normalized_dbms_version}) {
+    $supports_rno = 1 if $self->_server_info->{normalized_dbms_version} >= 9;
+  }
+  else {
+    # User is connecting via DBD::Sybase and has no permission to run
+    # stored procedures like xp_msver, or version detection failed for some
+    # other reason.
+    # So, we use a query to check if RNO is implemented.
+    try {
+      $self->_get_dbh->selectrow_array('SELECT row_number() OVER (ORDER BY rand())');
+      $supports_rno = 1;
+    };
   }
 
-  return $self->_sql_maker;
+  return $supports_rno ? 'RowNumberOver' : 'Top';
 }
 
 sub _ping {
@@ -228,17 +226,18 @@ sub _ping {
   local $dbh->{RaiseError} = 1;
   local $dbh->{PrintError} = 0;
 
-  eval {
+  return try {
     $dbh->do('select 1');
+    1;
+  } catch {
+    0;
   };
-
-  return $@ ? 0 : 1;
 }
 
 package # hide from PAUSE
   DBIx::Class::Storage::DBI::MSSQL::DateTime::Format;
 
-my $datetime_format      = '%Y-%m-%d %H:%M:%S.%3N'; # %F %T 
+my $datetime_format      = '%Y-%m-%d %H:%M:%S.%3N'; # %F %T
 my $smalldatetime_format = '%Y-%m-%d %H:%M:%S';
 
 my ($datetime_parser, $smalldatetime_parser);