Merge pull request #13144 from taosdata/fix/TD-15892

fix(query): restrict diff function ignore_negative types to integer

source/libs/function/src/builtins.c

@@ -700,6 +700,11 @@ static int32_t translateDiff(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
 
   //param1
   if (numOfParams == 2) {
+    uint8_t paraType = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 1))->resType.type;
+    if (!IS_INTEGER_TYPE(paraType)) {
+      return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
+    }
+
     SNode* pParamNode1 = nodesListGetNode(pFunc->pParameterList, 1);
     if (QUERY_NODE_VALUE != nodeType(pParamNode1)) {
       return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);