change repeat_scan to pre_scan

include/libs/function/function.h

@@ -76,7 +76,7 @@ enum {
 enum {
   MAIN_SCAN = 0x0u,
   REVERSE_SCAN = 0x1u,  // todo remove it
-  REPEAT_SCAN = 0x2u,   // repeat scan belongs to the master scan
+  PRE_SCAN = 0x2u,   // pre-scan belongs to the main scan and occurs before main scan
 };
 
 typedef struct SPoint1 {

source/libs/executor/src/executorimpl.c

@@ -538,7 +538,7 @@ bool functionNeedToExecute(SqlFunctionCtx* pCtx) {
     return false;
   }
 
-  if (pCtx->scanFlag == REPEAT_SCAN) {
+  if (pCtx->scanFlag == PRE_SCAN) {
     return fmIsRepeatScanFunc(pCtx->functionId);
   }
 

source/libs/executor/src/scanoperator.c

@@ -880,10 +880,11 @@ SOperatorInfo* createTableScanOperatorInfo(STableScanPhysiNode* pTableScanNode,
   pInfo->scanInfo = (SScanInfo){.numOfAsc = pTableScanNode->scanSeq[0], .numOfDesc = pTableScanNode->scanSeq[1]};
 
   if (pInfo->scanInfo.numOfAsc > 1) {
-    pInfo->base.scanFlag = REPEAT_SCAN;
+    pInfo->base.scanFlag = PRE_SCAN;
   } else {
     pInfo->base.scanFlag = MAIN_SCAN;
   }
+
   pInfo->base.pdInfo.interval = extractIntervalInfo(pTableScanNode);
   pInfo->base.readHandle = *readHandle;
   pInfo->base.dataBlockLoadFlag = pTableScanNode->dataRequired;