refactor: do some internal refactor.

source/libs/executor/src/scanoperator.c

@@ -675,9 +675,6 @@ SOperatorInfo* createTableScanOperatorInfo(STableScanPhysiNode* pTableScanNode,
   }
 
   pInfo->scanInfo = (SScanInfo){.numOfAsc = pTableScanNode->scanSeq[0], .numOfDesc = pTableScanNode->scanSeq[1]};
-//      pInfo->scanInfo = (SScanInfo){.numOfAsc = 0, .numOfDesc = 1}; // for debug purpose
-//      pInfo->cond.order = TSDB_ORDER_DESC;
-
   pInfo->pdInfo.interval = extractIntervalInfo(pTableScanNode);
   pInfo->readHandle = *readHandle;
   pInfo->sample.sampleRatio = pTableScanNode->ratio;

source/libs/function/src/builtins.c

@@ -2276,6 +2276,8 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .initFunc     = functionSetup,
     .processFunc  = lastRowFunction,
     .sprocessFunc = firstLastScalarFunction,
+    .pPartialFunc = "_last_row_partial",
+    .pMergeFunc   = "_last_row_merge",
     .finalizeFunc = firstLastFinalize
   },
   {
@@ -2288,6 +2290,27 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .processFunc  = cachedLastRowFunction,
     .finalizeFunc = firstLastFinalize
   },
+  {
+    .name = "_last_row_partial",
+    .type = FUNCTION_TYPE_LAST_PARTIAL,
+    .classification = FUNC_MGT_AGG_FUNC | FUNC_MGT_SELECT_FUNC | FUNC_MGT_MULTI_RES_FUNC | FUNC_MGT_IMPLICIT_TS_FUNC,
+    .translateFunc = translateFirstLastPartial,
+    .dynDataRequiredFunc = lastDynDataReq,
+    .getEnvFunc   = getFirstLastFuncEnv,
+    .initFunc     = functionSetup,
+    .processFunc  = lastRowFunction,
+    .finalizeFunc = firstLastPartialFinalize,
+  },
+  {
+    .name = "_last_row_merge",
+    .type = FUNCTION_TYPE_LAST_MERGE,
+    .classification = FUNC_MGT_AGG_FUNC | FUNC_MGT_SELECT_FUNC | FUNC_MGT_MULTI_RES_FUNC | FUNC_MGT_IMPLICIT_TS_FUNC,
+    .translateFunc = translateFirstLastMerge,
+    .getEnvFunc   = getFirstLastFuncEnv,
+    .initFunc     = functionSetup,
+    .processFunc  = lastFunctionMerge,
+    .finalizeFunc = firstLastFinalize,
+  },
   {
     .name = "first",
     .type = FUNCTION_TYPE_FIRST,