Changes

diff --git a/Changes b/Changes
index 73c424f..81ec262 100644 (file)
--- a/Changes
+++ b/Changes
@@ -1,6 +1,9 @@
 Revision history for DBIx::Class
 
         - Perl 5.8.1 is now the minimum supported version
+        - Massive optimization of the join resolution code - now joins
+          will be removed from the resulting SQL if DBIC can prove they
+          are not referenced by anything
         - Subqueries no longer marked experimental
         - might_have/has_one now warn if applied calling class's column
           has is_nullable set to true.

diff --git a/lib/DBIx/Class/Storage/DBIHacks.pm b/lib/DBIx/Class/Storage/DBIHacks.pm
index 2d9fd35..dd53655 100644 (file)
--- a/lib/DBIx/Class/Storage/DBIHacks.pm
+++ b/lib/DBIx/Class/Storage/DBIHacks.pm
@@ -97,6 +97,7 @@ sub _adjust_select_args_for_complex_prefetch {
   }
 
   # construct the inner $from for the subquery
+  # we need to prune first, because this will determine if we need a group_bu below
   my $inner_from = $self->_prune_unused_joins ($from, $inner_select, $where, $inner_attrs);
 
   # if a multi-type join was needed in the subquery - add a group_by to simulate the