refactor: do some internal refactor.

include/libs/function/function.h

@@ -54,7 +54,7 @@ typedef struct SFuncExecFuncs {
   FExecCombine  combine;
 } SFuncExecFuncs;
 
-#define MAX_INTERVAL_TIME_WINDOW 1000000  // maximum allowed time windows in final results
+#define MAX_INTERVAL_TIME_WINDOW 10000000  // maximum allowed time windows in final results
 
 #define TOP_BOTTOM_QUERY_LIMIT    100
 #define FUNCTIONS_NAME_MAX_LENGTH 16

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

@@ -265,6 +265,23 @@ int32_t tLDataIterOpen(struct SLDataIter **pIter, SDataFReader *pReader, int32_t
 
     // only apply to the child tables, ordinary tables will not incur this filter procedure.
     size = taosArrayGetSize(pBlockLoadInfo->aSttBlk);
+
+    if (size > 1) {
+      SSttBlk *pStart = taosArrayGet(pBlockLoadInfo->aSttBlk, 0);
+      SSttBlk *pEnd = taosArrayGet(pBlockLoadInfo->aSttBlk, size - 1);
+
+      // all identical
+      if (pStart->suid == pEnd->suid) {
+        if (pStart->suid == suid) {
+          // do nothing
+        } else if (pStart->suid != suid) {
+          // no qualified stt block existed
+          (*pIter)->iSttBlk = -1;
+          double el = (taosGetTimestampUs() - st)/1000.0;
+          tsdbDebug("load the last file info completed, elapsed time:%.2fms, %s", el, idStr);
+          return code;
+        }
+      } else {
         SArray *pTmp = taosArrayInit(size, sizeof(SSttBlk));
         for (int32_t i = 0; i < size; ++i) {
           SSttBlk *p = taosArrayGet(pBlockLoadInfo->aSttBlk, i);
@@ -282,6 +299,8 @@ int32_t tLDataIterOpen(struct SLDataIter **pIter, SDataFReader *pReader, int32_t
 
         taosArrayDestroy(pBlockLoadInfo->aSttBlk);
         pBlockLoadInfo->aSttBlk = pTmp;
+      }
+    }
 
     double el = (taosGetTimestampUs() - st)/1000.0;
     tsdbDebug("load the last file info completed, elapsed time:%.2fms, %s", el, idStr);

source/libs/function/src/builtins.c

@@ -662,7 +662,7 @@ static int32_t translateTopBot(SFunctionNode* pFunc, char* pErrBuf, int32_t len)
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  if (pValue->datum.i < 1 || pValue->datum.i > 100) {
+  if (pValue->datum.i < 1 || pValue->datum.i > TOP_BOTTOM_QUERY_LIMIT) {
     return invaildFuncParaValueErrMsg(pErrBuf, len, pFunc->functionName);
   }