From f2a61abac62431b945fd0a328cd96faf85263a0d Mon Sep 17 00:00:00 2001
From: Hui Li <huili@taosdata.com>
Date: Fri, 10 Jul 2020 15:21:55 +0800
Subject: [PATCH] [TD-889]

---
 src/mnode/src/mnodeDb.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/mnode/src/mnodeDb.c b/src/mnode/src/mnodeDb.c
index c13cd7c95c..8c74c9413d 100644
--- a/src/mnode/src/mnodeDb.c
+++ b/src/mnode/src/mnodeDb.c
@@ -179,9 +179,14 @@ void mnodeDecDbRef(SDbObj *pDb) {
 
 SDbObj *mnodeGetDbByTableId(char *tableId) {
   char db[TSDB_TABLE_ID_LEN], *pos;
-
+ 
+  // tableId format should be :  acct.db.table
   pos = strstr(tableId, TS_PATH_DELIMITER);
+  assert(NULL != pos);
+
   pos = strstr(pos + 1, TS_PATH_DELIMITER);
+  assert(NULL != pos);
+
   memset(db, 0, sizeof(db));
   strncpy(db, tableId, pos - tableId);