diff --git a/include/libs/function/functionMgt.h b/include/libs/function/functionMgt.h
index 77376a05d9..d77b914fae 100644
--- a/include/libs/function/functionMgt.h
+++ b/include/libs/function/functionMgt.h
@@ -129,6 +129,8 @@ typedef enum EFunctionType {
   FUNCTION_TYPE_SPREAD_MERGE,
   FUNCTION_TYPE_HISTOGRAM_PARTIAL,
   FUNCTION_TYPE_HISTOGRAM_MERGE,
+  FUNCTION_TYPE_HYPERLOGLOG_PARTIAL,
+  FUNCTION_TYPE_HYPERLOGLOG_MERGE,
 
   // user defined funcion
   FUNCTION_TYPE_UDF = 10000
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index eca4587c03..bc5f56784a 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -1480,6 +1480,26 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .processFunc  = hllFunction,
     .finalizeFunc = hllFinalize
   },
+  {
+    .name = "_hyperloglog_partial",
+    .type = FUNCTION_TYPE_HYPERLOGLOG_PARTIAL,
+    .classification = FUNC_MGT_AGG_FUNC,
+    .translateFunc = translateHLL,
+    .getEnvFunc   = getHLLFuncEnv,
+    .initFunc     = functionSetup,
+    .processFunc  = hllFunction,
+    .finalizeFunc = hllFinalize
+  },
+  {
+    .name = "_hyperloglog_merge",
+    .type = FUNCTION_TYPE_HYPERLOGLOG_MERGE,
+    .classification = FUNC_MGT_AGG_FUNC,
+    .translateFunc = translateHLL,
+    .getEnvFunc   = getHLLFuncEnv,
+    .initFunc     = functionSetup,
+    .processFunc  = hllFunction,
+    .finalizeFunc = hllFinalize
+  },
   {
     .name = "diff",
     .type = FUNCTION_TYPE_DIFF,