+static void session_clear_set(struct session *se,
+ const char *sort_field, int increasing)
+{
+ reclist_destroy(se->reclist);
+ se->reclist = 0;
+ if (nmem_total(se->nmem))
+ session_log(se, YLOG_DEBUG, "NMEN operation usage %zd",
+ nmem_total(se->nmem));
+ nmem_reset(se->nmem);
+ se->total_records = se->total_merged = 0;
+ se->num_termlists = 0;
+
+ /* reset list of sorted results and clear to relevance search */
+ se->sorted_results = nmem_malloc(se->nmem, sizeof(*se->sorted_results));
+ se->sorted_results->field = nmem_strdup(se->nmem, sort_field);
+ se->sorted_results->increasing = increasing;
+ se->sorted_results->next = 0;
+
+ se->reclist = reclist_create(se->nmem);
+}
+
+void session_sort(struct session *se, const char *field, int increasing,
+ int clear_set)