Optimize away always-true hold count clause

When rendering results in the tpac we request hold counts for each record.
Most of the time (that is, whenever org unit hiding is /not/ in use) we
filter, essentially, on "where pickup_lib is in the org tree".  This is
both useless and slow, so this commit will recognize that and optimize the
test away.

[LFW: fixed typo]

Signed-off-by: Mike Rylander <mrylander@gmail.com>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>

diff --git a/Open-ILS/src/perlmods/lib/OpenILS/Application/Circ/Holds.pm b/Open-ILS/src/perlmods/lib/OpenILS/Application/Circ/Holds.pm
index affbb2e..cb99b3d 100644 (file)
--- a/Open-ILS/src/perlmods/lib/OpenILS/Application/Circ/Holds.pm
+++ b/Open-ILS/src/perlmods/lib/OpenILS/Application/Circ/Holds.pm
@@ -4133,6 +4133,11 @@ sub rec_hold_count {
 
 
     if (my $pld = $args->{pickup_lib_descendant}) {
+
+        my $top_ou = new_editor()->search_actor_org_unit(
+            {parent_ou => undef}
+        )->[0]; # XXX Assumes single root node. Not alone in this...
+
         $query->{where}->{'+ahr'}->{pickup_lib} = {
             in => {
                 select  => {aou => [{ 
@@ -4143,7 +4148,7 @@ sub rec_hold_count {
                 from    => 'aou',
                 where   => {id => $pld}
             }
-        };
+        } if ($pld != $top_ou->id);
     }