[optimization] traced_selection is used very intensively in debug mode
optimizing it is worth the pain. Basically : don't do stuff unnecessary
when we don't trace anything.
/*
* functions specific to cubicweb on google appengine
*
* :organization: Logilab
* :copyright: 2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
* :contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
*/
/* overrides rql_for_eid function from htmlhelpers.hs */
function rql_for_eid(eid) { return 'Any X WHERE X eid "' + eid + '"'; }