fix(query): set the correct number of rows when calculating using sma for min/max function.

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

@@ -2839,12 +2839,11 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
 
   ASSERT(pBlockInfo != NULL);
 
-  if (pBlockInfo != NULL) {
-    pScanInfo =
-        *(STableBlockScanInfo**)taosHashGet(pReader->status.pTableMap, &pBlockInfo->uid, sizeof(pBlockInfo->uid));
-  } else {
-    pScanInfo = *pReader->status.pTableIter;
-  }
+//  if (pBlockInfo != NULL) {
+  pScanInfo = *(STableBlockScanInfo**)taosHashGet(pReader->status.pTableMap, &pBlockInfo->uid, sizeof(pBlockInfo->uid));
+  //  } else {
+  //    pScanInfo = *pReader->status.pTableIter;
+  //  }
 
   if (pScanInfo == NULL) {
     tsdbError("failed to get table scan-info, %s", pReader->idStr);
@@ -2852,46 +2851,14 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
     return code;
   }
 
-  if (pBlockInfo != NULL) {
-    pBlock = getCurrentBlock(pBlockIter);
-  }
+//  if (pBlockInfo != NULL) {
+  pBlock = getCurrentBlock(pBlockIter);
+//  }
 
   initLastBlockReader(pLastBlockReader, pScanInfo, pReader);
   TSDBKEY keyInBuf = getCurrentKeyInBuf(pScanInfo, pReader);
 
-  /*if (pBlockInfo == NULL) {  // build data block from last data file
-    SBlockData* pBData = &pReader->status.fileBlockData;
-    tBlockDataReset(pBData);
-
-    SSDataBlock* pResBlock = pReader->pResBlock;
-    tsdbDebug("load data in last block firstly, due to desc scan data, %s", pReader->idStr);
-
-    int64_t st = taosGetTimestampUs();
-
-    while (1) {
-      bool hasBlockLData = hasDataInLastBlock(pLastBlockReader);
-
-      // no data in last block and block, no need to proceed.
-      if (hasBlockLData == false) {
-        break;
-      }
-
-      buildComposedDataBlockImpl(pReader, pScanInfo, &pReader->status.fileBlockData, pLastBlockReader);
-      if (pResBlock->info.rows >= pReader->capacity) {
-        break;
-      }
-    }
-
-    double el = (taosGetTimestampUs() - st) / 1000.0;
-    updateComposedBlockInfo(pReader, el, pScanInfo);
-
-    if (pResBlock->info.rows > 0) {
-      tsdbDebug("%p uid:%" PRIu64 ", composed data block created, brange:%" PRIu64 "-%" PRIu64
-                    " rows:%d, elapsed time:%.2f ms %s",
-                pReader, pResBlock->info.id.uid, pResBlock->info.window.skey, pResBlock->info.window.ekey,
-                pResBlock->info.rows, el, pReader->idStr);
-    }
-  } else*/ if (fileBlockShouldLoad(pReader, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader)) {
+  if (fileBlockShouldLoad(pReader, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader)) {
     code = doLoadFileBlockData(pReader, pBlockIter, &pStatus->fileBlockData, pScanInfo->uid);
     if (code != TSDB_CODE_SUCCESS) {
       return code;

source/libs/function/src/detail/tminmax.c

@@ -714,26 +714,18 @@ int32_t doMinMaxHelper(SqlFunctionCtx* pCtx, int32_t isMinFunc, int32_t* nElems)
   pBuf->type = type;
 
   if (IS_NULL_TYPE(type)) {
-    numOfElems = 0;
     goto _over;
   }
 
   // data in current data block are qualified to the query
   if (pInput->colDataSMAIsSet) {
     numOfElems = pInput->numOfRows - pAgg->numOfNull;
-
     if (numOfElems == 0) {
       goto _over;
     }
 
-    void*   tval = NULL;
     int16_t index = 0;
-
-    if (isMinFunc) {
-      tval = &pInput->pColumnDataAgg[0]->min;
-    } else {
-      tval = &pInput->pColumnDataAgg[0]->max;
-    }
+    void*   tval = (isMinFunc) ? &pInput->pColumnDataAgg[0]->min : &pInput->pColumnDataAgg[0]->max;
 
     if (!pBuf->assign) {
       if (type == TSDB_DATA_TYPE_FLOAT) {
@@ -824,8 +816,9 @@ int32_t doMinMaxHelper(SqlFunctionCtx* pCtx, int32_t isMinFunc, int32_t* nElems)
       }
     }
 
+    numOfElems = 1;
     pBuf->assign = true;
-    return TSDB_CODE_SUCCESS;
+    goto _over;
   }
 
   int32_t start = pInput->startRowIndex;

tests/script/tsim/parser/regressiontest.sim

@@ -31,13 +31,8 @@ sql insert into $tb values ( $ts , $x )
 $x = $x + 1
 endw
 
-print ================== restart server to commit data into disk
-system sh/exec.sh -n dnode1 -s stop -x SIGINT
-system sh/exec.sh -n dnode1 -s start
-print ================== server restart completed
-sql connect
+sql flush database $db
 
-sql use $db
 sql delete from $tb where ts=1537146000000
 sql delete from $tb where ts=1537146409500
 
@@ -63,7 +58,6 @@ if $rows != 8198 then
   return -1
 endi
 
-print ===========================>  TD-22077  && TD-21877
 sql drop database if exists $db -x step1
 sql create database $db vgroups 1;
 
@@ -88,6 +82,8 @@ endw
 
 sql flush database $db
 
+print ===========================>  TD-22077  && TD-21877
+
 sql insert into t1 values('2018-09-17 09:00:26', 26);
 sql insert into t2 values('2018-09-17 09:00:25', 25);
 
@@ -97,4 +93,33 @@ sql flush  database reg_db0;
 sql delete from st1 where ts<='2018-9-17 09:00:26';
 sql select * from st1;
 
+sql drop table t1
+sql drop table t2
+
+print =========================================>TD-22196
+sql create table t1 using st1 tags(1);
+
+$i = 0
+$ts = 1674977959000
+$rowNum = 200
+
+$x = 0
+while $x < $rowNum
+$xs = $x * $delta
+$ts = $ts0 + $xs
+sql insert into t1 values ( $ts , $x )
+$x = $x + 1
+$ts = $ts + 1000
+endw
+
+sql flush database $db
+sql select min(c),max(c) from t1
+if $data00 != 0 then
+   return -1
+endi
+
+if $data01 != 199 then
+  return -1
+endi
+
 system sh/exec.sh -n dnode1 -s stop -x SIGINT