From 991b5c7b40271822511014394d336478c62c49dc Mon Sep 17 00:00:00 2001
From: yihaoDeng <luomoxyz@126.com>
Date: Tue, 7 Jun 2022 17:57:26 +0800
Subject: [PATCH] fix: avoid invalid read/write

---
 source/dnode/vnode/src/meta/metaTable.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/dnode/vnode/src/meta/metaTable.c b/source/dnode/vnode/src/meta/metaTable.c
index 64c811ca18..b2670291eb 100644
--- a/source/dnode/vnode/src/meta/metaTable.c
+++ b/source/dnode/vnode/src/meta/metaTable.c
@@ -70,6 +70,9 @@ static int metaSaveJsonVarToIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry, const
 
     char *  key = pTagVal->pKey;
     int32_t nKey = strlen(key);
+    if (nKey == 0) {
+      continue;
+    }
 
     SIndexTerm *term = NULL;
     if (type == TSDB_DATA_TYPE_NULL) {
@@ -98,7 +101,6 @@ static int metaSaveJsonVarToIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry, const
     if (term != NULL) {
       indexMultiTermAdd(terms, term);
     }
-    memset(key, 0, sizeof(key));
   }
   tIndexJsonPut(pMeta->pTagIvtIdx, terms, tuid);
   indexMultiTermDestroy(terms);