enh(query): opt query perf.

source/dnode/vnode/src/tsdb/tsdbRead.c

@@ -985,7 +985,8 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
           uint8_t* p = pData->pData + tDataTypes[pData->type].bytes * pDumpInfo->rowIndex;
           memcpy(pColData->pData, p, remain * tDataTypes[pData->type].bytes);
 
-          ASSERT((((uint64_t)pColData->pData) & (0x8 - 1)) == 0); // make sure it is aligned to 8bit
+          // make sure it is aligned to 8bit
+          ASSERT((((uint64_t)pColData->pData) & (0x8 - 1)) == 0);
 
           // null value exists, check one-by-one
           if (pData->flag != HAS_VALUE) {

source/libs/function/src/builtinsimpl.c

@@ -3096,7 +3096,7 @@ int32_t lastFunction(SqlFunctionCtx* pCtx) {
     numOfElems++;
 
     char* data = colDataGetData(pInputCol, i);
-    TSKEY cts = getRowPTs(pInput->pPTS, i);
+    TSKEY cts = *(TSKEY*) colDataGetData(pInput->pPTS, i);
     if (pResInfo->numOfRes == 0 || pInfo->ts < cts) {
       doSaveCurrentVal(pCtx, i, cts, type, data);
       pResInfo->numOfRes = 1;