X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=include%2Fhfta%2Fhfta_udaf.h;fp=include%2Fhfta%2Fhfta_udaf.h;h=9c960b57fe06d50532934ef7e795dfb435286894;hb=87cd81502f23b63c980bbce93b6159379299c782;hp=6281859aae52fadf4db73a7eca25a879ffdd3b60;hpb=989d19428b3d21982b048cf256f625a8ca664c2e;p=com%2Fgs-lite.git

diff --git a/include/hfta/hfta_udaf.h b/include/hfta/hfta_udaf.h
index 6281859..9c960b5 100644
--- a/include/hfta/hfta_udaf.h
+++ b/include/hfta/hfta_udaf.h
@@ -298,4 +298,31 @@ gs_uint32_t extr_quant_hfta0_fcn(vstring *, gs_float_t);
 gs_uint32_t extr_med_hfta0_fcn(vstring *);
 gs_uint32_t extr_quant_hfta0_space(vstring *);
 
+
+/****************************************************************/
+//		Approximate count distinct.
+//		Rely on the minhashing approach.
+//		Currently HFTA-only
+//		Uses a 32-bit hash, tested up to 100,000,000 elements
+//		and it gave good results (within 7%)
+/****************************************************************/
+
+// ---------------------------------------------
+//	HFTA-only
+void approx_count_distinct_udaf_HFTA_AGGR_INIT_(gs_sp_t buf);
+void approx_count_distinct_udaf_HFTA_AGGR_REINIT_(gs_sp_t buf);
+void approx_count_distinct_udaf_HFTA_AGGR_DESTROY_(gs_sp_t buf);
+void approx_count_distinct_udaf_HFTA_AGGR_UPDATE_(gs_sp_t buf, vstring *val);
+void approx_count_distinct_udaf_HFTA_AGGR_OUTPUT_(vstring *res, gs_sp_t buf);
+
+void running_approx_count_distinct_udaf_HFTA_AGGR_INIT_(gs_sp_t buf);
+void running_approx_count_distinct_udaf_HFTA_AGGR_REINIT_(gs_sp_t buf);
+void running_approx_count_distinct_udaf_HFTA_AGGR_DESTROY_(gs_sp_t buf);
+void running_approx_count_distinct_udaf_HFTA_AGGR_UPDATE_(gs_sp_t buf, vstring *val);
+void running_approx_count_distinct_udaf_HFTA_AGGR_OUTPUT_(vstring *res, gs_sp_t buf);
+
+gs_float_t extr_approx_count_distinct(vstring *v);
+
+
+
 #endif