[6046]<fix> fix ts is null

4b9c461c · wmmhello · 059576a3 · 4b9c461c
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src/client/src/tscSQLParser.c src/client/src/tscSQLParser.c +4 -0

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--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -7052,6 +7052,10 @@ static int32_t checkUpdateTagPrjFunctions(SQueryInfo* pQueryInfo, char* msg) {
      continue;
    }
+    if(functionId == TSDB_FUNC_DERIVATIVE){     // to avoid ts function id was modufied below
+      tagTsColExists = false;
+    }
    if (functionId < 0) {
      SUdfInfo* pUdfInfo = taosArrayGet(pQueryInfo->pUdfInfo, -1 * functionId - 1);
      if (pUdfInfo->funcType == TSDB_UDF_TYPE_AGGREGATE) {