diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 9ca28d06cb8a0260ab79d6196afcdfc80a9dfd3f..a65d956eb07d17cd928641de373222fcf6f1b22f 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -725,6 +725,7 @@ static int tsdbAdjustMemMaxTables(SMemTable *pMemTable, int maxTables) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
     return -1;
   }
+  memcpy((void *)pTableData, (void *)pMemTable->tData, sizeof(STableData *) * pMemTable->maxTables);
 
   STableData **tData = pMemTable->tData;