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 -r1.51 -r1.52
--- openacs-4/packages/acs-kernel/sql/postgresql/postgresql.sql	1 May 2018 10:43:05 -0000	1.51
+++ openacs-4/packages/acs-kernel/sql/postgresql/postgresql.sql	17 Dec 2018 09:13:47 -0000	1.52
@@ -918,7 +918,7 @@
  return description;
 
 END;
-$$ LANGUAGE plpgsql with (iscachable);
+$$ LANGUAGE plpgsql IMMUTABLE;
 
 
 -- added