enh: enable interp fill value support scarlar expression

source/libs/parser/src/parTranslater.c

@@ -707,6 +707,10 @@ static bool isWindowPseudoColumnFunc(const SNode* pNode) {
   return (QUERY_NODE_FUNCTION == nodeType(pNode) && fmIsWindowPseudoColumnFunc(((SFunctionNode*)pNode)->funcId));
 }
 
+static bool isInterpFunc(const SNode* pNode) {
+  return (QUERY_NODE_FUNCTION == nodeType(pNode) && fmIsInterpFunc(((SFunctionNode*)pNode)->funcId));
+}
+
 static bool isInterpPseudoColumnFunc(const SNode* pNode) {
   return (QUERY_NODE_FUNCTION == nodeType(pNode) && fmIsInterpPseudoColumnFunc(((SFunctionNode*)pNode)->funcId));
 }
@@ -3006,7 +3010,7 @@ static int32_t translateOrderBy(STranslateContext* pCxt, SSelectStmt* pSelect) {
 }
 
 static EDealRes needFillImpl(SNode* pNode, void* pContext) {
-  if (isAggFunc(pNode) && FUNCTION_TYPE_GROUP_KEY != ((SFunctionNode*)pNode)->funcType) {
+  if ((isAggFunc(pNode) || isInterpFunc(pNode)) && FUNCTION_TYPE_GROUP_KEY != ((SFunctionNode*)pNode)->funcType) {
     *(bool*)pContext = true;
     return DEAL_RES_END;
   }
@@ -3517,6 +3521,9 @@ static int32_t translateInterpFill(STranslateContext* pCxt, SSelectStmt* pSelect
   if (TSDB_CODE_SUCCESS == code) {
     code = checkFill(pCxt, (SFillNode*)pSelect->pFill, (SValueNode*)pSelect->pEvery, true);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = checkFillValues(pCxt, (SFillNode*)pSelect->pFill, pSelect->pProjectionList);
+  }
 
   return code;
 }