beginOperation(false);
try {
StoreQuery sq = _store.newQuery(lang);
if (sq == null) {
ExpressionParser ep = QueryLanguages.parserForLanguage(lang);
if (ep != null)
sq = new ExpressionStoreQuery(ep);
else if (QueryLanguages.LANG_METHODQL.equals(lang))
sq = new MethodStoreQuery();
else