SphinxClient::setGroupDistinct Set attribute name for per-group distinct values count calculations &reftitle.description; public boolSphinxClient::setGroupDistinct stringattribute Sets attribute name for per-group distinct values count calculations. Only available for grouping queries. For each group, all values of attribute will be stored, then the amount of distinct values will be calculated and returned to the client. This feature is similar to COUNT(DISTINCT) clause in SQL. &reftitle.parameters; attribute A string containing group-by attribute name. &reftitle.returnvalues; &return.success; &reftitle.seealso;