Index: openacs-4/packages/acs-kernel/sql/postgresql/postgresql.sql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-kernel/sql/postgresql/postgresql.sql,v
diff -u -N -r1.48.2.6 -r1.48.2.7
--- openacs-4/packages/acs-kernel/sql/postgresql/postgresql.sql	21 Apr 2017 15:59:20 -0000	1.48.2.6
+++ openacs-4/packages/acs-kernel/sql/postgresql/postgresql.sql	20 Dec 2018 09:59:53 -0000	1.48.2.7
@@ -918,7 +918,7 @@
  return description;
 
 END;
-$$ LANGUAGE plpgsql with (iscachable);
+$$ LANGUAGE plpgsql IMMUTABLE;
 
 
 -- added