fix(query): fix error in add row into merger.

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

@@ -712,13 +712,68 @@ _exit:
 int32_t tsdbRowMergerAdd(SRowMerger *pMerger, TSDBROW *pRow, STSchema *pTSchema) {
   int32_t   code = 0;
   TSDBKEY   key = TSDBROW_KEY(pRow);
-  SColVal  *pColVal = &(SColVal){0};
+  SColVal * pColVal = &(SColVal){0};
   STColumn *pTColumn;
   int32_t   iCol, jCol = 1;
 
   if (NULL == pTSchema) {
     pTSchema = pMerger->pTSchema;
   }
+
+  if (taosArrayGetSize(pMerger->pArray) == 0) {
+    // ts
+    pTColumn = &pTSchema->columns[jCol++];
+
+    ASSERT(pTColumn->type == TSDB_DATA_TYPE_TIMESTAMP);
+
+    *pColVal = COL_VAL_VALUE(pTColumn->colId, pTColumn->type, (SValue){.val = key.ts});
+    if (taosArrayPush(pMerger->pArray, pColVal) == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      return code;
+      //      goto _exit;
+    }
+
+    // other
+    for (iCol = 1; jCol < pTSchema->numOfCols && iCol < pMerger->pTSchema->numOfCols; ++iCol) {
+      pTColumn = &pMerger->pTSchema->columns[iCol];
+      if (pTSchema->columns[jCol].colId < pTColumn->colId) {
+        ++jCol;
+        --iCol;
+        continue;
+      } else if (pTSchema->columns[jCol].colId > pTColumn->colId) {
+        taosArrayPush(pMerger->pArray, &COL_VAL_NONE(pTColumn->colId, pTColumn->type));
+        continue;
+      }
+
+      tsdbRowGetColVal(pRow, pTSchema, jCol++, pColVal);
+      if ((!COL_VAL_IS_NONE(pColVal)) && (!COL_VAL_IS_NULL(pColVal)) && IS_VAR_DATA_TYPE(pColVal->type)) {
+        uint8_t *pVal = pColVal->value.pData;
+
+        pColVal->value.pData = NULL;
+        code = tRealloc(&pColVal->value.pData, pColVal->value.nData);
+        if (code) {
+          return TSDB_CODE_OUT_OF_MEMORY;
+        }
+
+        if (pColVal->value.nData) {
+          memcpy(pColVal->value.pData, pVal, pColVal->value.nData);
+        }
+      }
+
+      if (taosArrayPush(pMerger->pArray, pColVal) == NULL) {
+        code = TSDB_CODE_OUT_OF_MEMORY;
+        return code;
+      }
+    }
+
+    for (; iCol < pMerger->pTSchema->numOfCols; ++iCol) {
+      pTColumn = &pMerger->pTSchema->columns[iCol];
+      taosArrayPush(pMerger->pArray, &COL_VAL_NONE(pTColumn->colId, pTColumn->type));
+    }
+
+    pMerger->version = key.version;
+    return 0;
+  } else {
     ASSERT(((SColVal *)pMerger->pArray->pData)->value.val == key.ts);
 
     for (iCol = 1; iCol < pMerger->pTSchema->numOfCols && jCol < pTSchema->numOfCols; ++iCol) {
@@ -777,6 +832,7 @@ int32_t tsdbRowMergerAdd(SRowMerger *pMerger, TSDBROW *pRow, STSchema *pTSchema)
 
     pMerger->version = key.version;
     return code;
+  }
 }
 
 int32_t tsdbRowMergerInit_rv(SRowMerger* pMerger, STSchema *pSchema) {