diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 30f51ab0df..9364c313ca 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -3665,48 +3665,6 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .estimateReturnRowsFunc = diffEstReturnRows,
     .processFuncByRow  = diffFunctionByRow,
   },
-  {
-    .name = "forecast",
-    .type = FUNCTION_TYPE_FORECAST,
-    .classification = FUNC_MGT_TIMELINE_FUNC | FUNC_MGT_INTERVAL_INTERPO_FUNC | FUNC_MGT_IMPLICIT_TS_FUNC |
-                      FUNC_MGT_FORBID_STREAM_FUNC | FUNC_MGT_FORBID_SYSTABLE_FUNC | FUNC_MGT_KEEP_ORDER_FUNC | FUNC_MGT_PRIMARY_KEY_FUNC,    
-    .translateFunc = translateForecast,
-    .getEnvFunc    = getSelectivityFuncEnv,
-    .initFunc      = functionSetup,
-    .processFunc   = NULL,
-    .finalizeFunc  = NULL,
-    .estimateReturnRowsFunc = forecastEstReturnRows,
-  },
-    {
-    .name = "_frowts",
-    .type = FUNCTION_TYPE_FORECAST_ROWTS,
-    .classification = FUNC_MGT_PSEUDO_COLUMN_FUNC | FUNC_MGT_FORECAST_PC_FUNC | FUNC_MGT_KEEP_ORDER_FUNC,
-    .translateFunc = translateTimePseudoColumn,
-    .getEnvFunc   = getTimePseudoFuncEnv,
-    .initFunc     = NULL,
-    .sprocessFunc = NULL,
-    .finalizeFunc = NULL
-  },
-  {
-    .name = "_flow",
-    .type = FUNCTION_TYPE_FORECAST_LOW,
-    .classification = FUNC_MGT_PSEUDO_COLUMN_FUNC | FUNC_MGT_FORECAST_PC_FUNC | FUNC_MGT_KEEP_ORDER_FUNC,
-    .translateFunc = translateForecastConf,
-    .getEnvFunc   = getForecastConfEnv,
-    .initFunc     = NULL,
-    .sprocessFunc = NULL,
-    .finalizeFunc = NULL
-  },
-  {
-    .name = "_fhigh",
-    .type = FUNCTION_TYPE_FORECAST_HIGH,
-    .classification = FUNC_MGT_PSEUDO_COLUMN_FUNC | FUNC_MGT_FORECAST_PC_FUNC | FUNC_MGT_KEEP_ORDER_FUNC,
-    .translateFunc = translateForecastConf,
-    .getEnvFunc   = getForecastConfEnv,
-    .initFunc     = NULL,
-    .sprocessFunc = NULL,
-    .finalizeFunc = NULL
-  },
   {
     .name = "statecount",
     .type = FUNCTION_TYPE_STATE_COUNT,