enh(query): first/last function adoption for MIA operator

TD-17254

source/libs/function/src/builtinsimpl.c

@@ -2882,12 +2882,16 @@ static int32_t firstLastFunctionMergeImpl(SqlFunctionCtx* pCtx, bool isFirstQuer
   SFirstLastRes* pInfo = GET_ROWCELL_INTERBUF(GET_RES_INFO(pCtx));
 
   int32_t start = pInput->startRowIndex;
-  char*          data = colDataGetData(pCol, start);
-  SFirstLastRes* pInputInfo = (SFirstLastRes*)varDataVal(data);
+  int32_t numOfElems = 0;
 
+  for(int32_t i = start; i < start + pInput->numOfRows; ++i) {
+    char* data = colDataGetData(pCol, i);
+    SFirstLastRes* pInputInfo = (SFirstLastRes*)varDataVal(data);
     firstLastTransferInfo(pCtx, pInputInfo, pInfo, isFirstQuery);
-
-  int32_t numOfElems = pInputInfo->hasResult ? 1 : 0;
+    if (!numOfElems) {
+      numOfElems = pInputInfo->hasResult ? 1 : 0;
+    }
+  }
 
   SET_VAL(GET_RES_INFO(pCtx), numOfElems, 1);