fix(query): set ptr to be NULL.

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

@@ -3673,7 +3673,7 @@ int32_t doMergeMemIMemRows(TSDBROW* pRow, TSDBROW* piRow, STableBlockScanInfo* p
   TSDBKEY ik = TSDBROW_KEY(piRow);
 
   if (ASCENDING_TRAVERSE(pReader->order)) {  // ascending order imem --> mem
-    STSchema* pSchema = doGetSchemaForTSRow(TSDBROW_SVERSION(pRow), pReader, pBlockScanInfo->uid);
+    STSchema* pSchema = doGetSchemaForTSRow(TSDBROW_SVERSION(piRow), pReader, pBlockScanInfo->uid);
 
     int32_t code = tsdbRowMergerInit(&merge, piRow, pSchema);
     if (code != TSDB_CODE_SUCCESS) {
@@ -3686,7 +3686,8 @@ int32_t doMergeMemIMemRows(TSDBROW* pRow, TSDBROW* piRow, STableBlockScanInfo* p
       return code;
     }
 
-    tsdbRowMerge(&merge, pRow);
+    pSchema = doGetSchemaForTSRow(TSDBROW_SVERSION(pRow), pReader, pBlockScanInfo->uid);
+    tsdbRowMergerAdd(&merge, pRow, pSchema);
     code =
         doMergeRowsInBuf(&pBlockScanInfo->iter, pBlockScanInfo->uid, k.ts, pBlockScanInfo->delSkyline, &merge, pReader);
     if (code != TSDB_CODE_SUCCESS) {

source/util/src/tsimplehash.c

@@ -75,6 +75,7 @@ SSHashObj *tSimpleHashInit(size_t capacity, _hash_fn_t fn) {
   pHashObj->capacity = taosHashCapacity((int32_t)capacity);
   pHashObj->equalFp = memcmp;
 
+  pHashObj->freeFp = NULL;
   pHashObj->offset = 0;
   pHashObj->size = 0;