diff --git a/src/tsdb/inc/tsdbMeta.h b/src/tsdb/inc/tsdbMeta.h
index 51801c843c279f10e9e0895a0f2dee2839a3f6a2..8ce5e7ade80b2006ac8c39fec178994073c5a26d 100644
--- a/src/tsdb/inc/tsdbMeta.h
+++ b/src/tsdb/inc/tsdbMeta.h
@@ -100,7 +100,7 @@ static FORCE_INLINE int tsdbCompareSchemaVersion(const void *key1, const void *k
 }
 
 static FORCE_INLINE STSchema* tsdbGetTableSchemaImpl(STable* pTable, bool lock, bool copy, int16_t _version) {
-  STable*   pDTable = (TABLE_TYPE(pTable) == TSDB_CHILD_TABLE) ? pTable->pSuper : pTable;
+  STable*   pDTable = (pTable->pSuper != NULL) ? pTable->pSuper : pTable;  // for performance purpose
   STSchema* pSchema = NULL;
   STSchema* pTSchema = NULL;
 
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 5a91d8f7901ff0278db0191003b7f451c8597bf6..14c5a04eced0597c26d34abab1e1cfbc3cd93482 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -3616,8 +3616,6 @@ SArray* createTableGroup(SArray* pTableList, STSchema* pTagSchema, SColIndex* pC
 
     for(int32_t i = 0; i < size; ++i) {
       STableKeyInfo *pKeyInfo = taosArrayGet(pTableList, i);
-      assert(((STable*)pKeyInfo->pTable)->type == TSDB_CHILD_TABLE);
-
       tsdbRefTable(pKeyInfo->pTable);
 
       STableKeyInfo info = {.pTable = pKeyInfo->pTable, .lastKey = skey};