fix translate function for now/today

source/libs/function/src/builtins.c

@@ -234,7 +234,7 @@ static int32_t translateWduration(SFunctionNode* pFunc, char* pErrBuf, int32_t l
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t translateTimePseudoColumn(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
+static int32_t translateNowToday(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
   // pseudo column do not need to check parameters
 
   //add database precision as param
@@ -245,6 +245,13 @@ static int32_t translateTimePseudoColumn(SFunctionNode* pFunc, char* pErrBuf, in
   return TSDB_CODE_SUCCESS;
 }
 
+static int32_t translateTimePseudoColumn(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
+  // pseudo column do not need to check parameters
+
+  pFunc->node.resType = (SDataType){.bytes = sizeof(int64_t), .type = TSDB_DATA_TYPE_TIMESTAMP};
+  return TSDB_CODE_SUCCESS;
+}
+
 static int32_t translateTimezone(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
   pFunc->node.resType = (SDataType){.bytes = TD_TIMEZONE_LEN, .type = TSDB_DATA_TYPE_BINARY};
   return TSDB_CODE_SUCCESS;
@@ -2471,7 +2478,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .name = "now",
     .type = FUNCTION_TYPE_NOW,
     .classification = FUNC_MGT_SCALAR_FUNC | FUNC_MGT_DATETIME_FUNC,
-    .translateFunc = translateTimePseudoColumn,
+    .translateFunc = translateNowToday,
     .getEnvFunc   = NULL,
     .initFunc     = NULL,
     .sprocessFunc = nowFunction,
@@ -2481,7 +2488,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .name = "today",
     .type = FUNCTION_TYPE_TODAY,
     .classification = FUNC_MGT_SCALAR_FUNC | FUNC_MGT_DATETIME_FUNC,
-    .translateFunc = translateTimePseudoColumn,
+    .translateFunc = translateNowToday,
     .getEnvFunc   = NULL,
     .initFunc     = NULL,
     .sprocessFunc = todayFunction,