DB2 and MSSQL have different default order syntaxes

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

diff --git a/lib/DBIx/Class/Storage/DBI/MSSQL.pm b/lib/DBIx/Class/Storage/DBI/MSSQL.pm
index 94597ab..cddfc5e 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/MSSQL.pm
+++ b/lib/DBIx/Class/Storage/DBI/MSSQL.pm
@@ -178,6 +178,28 @@ sub _execute {
 
 sub last_insert_id { shift->_identity }
 
+#
+# MSSQL is retarded wrt ordered subselects. One needs to add a TOP 100%
+# to *all* subqueries, do it here.
+#
+sub _select_args_to_query {
+  my $self = shift;
+
+  my ($sql, $prep_bind, @rest) = $self->next::method (@_);
+
+  # see if this is an ordered subquery
+  my $attrs = $_[3];
+  if ( scalar $self->sql_maker->_order_by_chunks ($attrs->{order_by}) ) {
+    $sql =~ s/^ \s* SELECT \s/SELECT TOP 100 PERCENT /xi;
+  }
+
+  return wantarray
+    ? ($sql, $prep_bind, @rest)
+    : \[ "($sql)", @$prep_bind ]
+  ;
+}
+
+
 # savepoint syntax is the same as in Sybase ASE
 
 sub _svp_begin {