int zebraExplain_add_attr_su(ZebraExplainInfo zei, int index_type,
int set, int use);
int zebraExplain_lookup_attr_str(ZebraExplainInfo zei, int index_type,
int zebraExplain_add_attr_su(ZebraExplainInfo zei, int index_type,
int set, int use);
int zebraExplain_lookup_attr_str(ZebraExplainInfo zei, int index_type,