Only consider main entry headings for bib overlay

Restrict the authority fields we will pull overlay data from to those
that do not subordinate themselves to other authority fields.  That
is, skip see-from/see-also/etc for bib overlay.

Signed-off-by: Mike Rylander <mrylander@gmail.com>

diff --git a/Open-ILS/src/sql/Pg/011.schema.authority.sql b/Open-ILS/src/sql/Pg/011.schema.authority.sql
index 1b15025..f0fdde4 100644 (file)
--- a/Open-ILS/src/sql/Pg/011.schema.authority.sql
+++ b/Open-ILS/src/sql/Pg/011.schema.authority.sql
@@ -408,7 +408,7 @@ BEGIN
         )::TEXT;
     END IF;
 
-    FOR main_entry IN SELECT * FROM authority.control_set_authority_field WHERE control_set = cset LOOP
+    FOR main_entry IN SELECT * FROM authority.control_set_authority_field WHERE control_set = cset AND main_entry IS NULL LOOP
         auth_field := XPATH('//*[@tag="'||main_entry.tag||'"][1]',source_xml::XML);
         IF ARRAY_LENGTH(auth_field,1) > 0 THEN
             FOR bib_field IN SELECT * FROM authority.control_set_bib_field WHERE authority_field = main_entry.id LOOP