diff --git a/source/libs/executor/src/sysscanoperator.c b/source/libs/executor/src/sysscanoperator.c
index f56945aa59..a8477cee33 100644
--- a/source/libs/executor/src/sysscanoperator.c
+++ b/source/libs/executor/src/sysscanoperator.c
@@ -595,6 +595,7 @@ static SSDataBlock* sysTableScanUserCols(SOperatorInfo* pOperator) {
       void* schema = taosHashGet(pInfo->pSchema, &pInfo->pCur->mr.me.uid, sizeof(int64_t));
       if (schema == NULL) {
         SSchemaWrapper* schemaWrapper = tCloneSSchemaWrapper(&pInfo->pCur->mr.me.stbEntry.schemaRow);
+        QUERY_CHECK_NULL(schemaWrapper, code, lino, _end, terrno);
         code = taosHashPut(pInfo->pSchema, &pInfo->pCur->mr.me.uid, sizeof(int64_t), &schemaWrapper, POINTER_BYTES);
         if (code == TSDB_CODE_DUP_KEY) {
           code = TSDB_CODE_SUCCESS;
@@ -626,6 +627,7 @@ static SSDataBlock* sysTableScanUserCols(SOperatorInfo* pOperator) {
           return NULL;
         }
         SSchemaWrapper* schemaWrapper = tCloneSSchemaWrapper(&smrSuperTable.me.stbEntry.schemaRow);
+        QUERY_CHECK_NULL(schemaWrapper, code, lino, _end, terrno);
         code = taosHashPut(pInfo->pSchema, &suid, sizeof(int64_t), &schemaWrapper, POINTER_BYTES);
         if (code == TSDB_CODE_DUP_KEY) {
           code = TSDB_CODE_SUCCESS;