diff --git a/source/dnode/vnode/src/tsdb/tsdbReadUtil.c b/source/dnode/vnode/src/tsdb/tsdbReadUtil.c
index e96b90af4d8b52b72ed8bddfb61aed61a2f5e542..8759adca354636dc9747eb366b48bcfb999c3b92 100644
--- a/source/dnode/vnode/src/tsdb/tsdbReadUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbReadUtil.c
@@ -387,7 +387,9 @@ int32_t initBlockIterator(STsdbReader* pReader, SDataBlockIter* pBlockIter, int3
   // since there is only one table qualified, blocks are not sorted
   if (sup.numOfTables == 1) {
     STableBlockScanInfo* pTableScanInfo = taosArrayGetP(pTableList, 0);
-    taosArrayInit(numOfBlocks, sizeof(STableDataBlockIdx));
+    if (pTableScanInfo->pBlockIdxList == NULL) {
+      pTableScanInfo->pBlockIdxList = taosArrayInit(numOfBlocks, sizeof(STableDataBlockIdx));
+    }
     for (int32_t i = 0; i < numOfBlocks; ++i) {
       SFileDataBlockInfo blockInfo = {.uid = sup.pDataBlockInfo[0][i].uid, .tbBlockIdx = i};
       blockInfo.record = *(SBrinRecord*)taosArrayGet(sup.pDataBlockInfo[0][i].pInfo->pBlockList, i);