fix: stream plan error

include/libs/nodes/querynodes.h

@@ -106,7 +106,7 @@ typedef struct SValueNode {
     char*    p;
   } datum;
   int64_t typeData;
-  char    unit;
+  int8_t  unit;
 } SValueNode;
 
 typedef struct SLeftValueNode {

source/libs/nodes/src/nodesCodeFuncs.c

@@ -2952,6 +2952,7 @@ static const char* jkValueDuration = "Duration";
 static const char* jkValueTranslate = "Translate";
 static const char* jkValueNotReserved = "NotReserved";
 static const char* jkValueIsNull = "IsNull";
+static const char* jkValueUnit = "Unit";
 static const char* jkValueDatum = "Datum";
 
 static int32_t datumToJson(const void* pObj, SJson* pJson) {
@@ -3041,6 +3042,9 @@ static int32_t valueNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkValueIsNull, pNode->isNull);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkValueUnit, pNode->unit);
+  }
   if (TSDB_CODE_SUCCESS == code && pNode->translate && !pNode->isNull) {
     code = datumToJson(pNode, pJson);
   }
@@ -3191,6 +3195,9 @@ static int32_t jsonToValueNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkValueIsNull, &pNode->isNull);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetTinyIntValue(pJson, jkValueUnit, &pNode->unit);
+  }
   if (TSDB_CODE_SUCCESS == code && pNode->translate && !pNode->isNull) {
     code = jsonToDatum(pJson, pNode);
   }