From 0b3fb779c066c8b47c31c04d5ce5acad14427c7a Mon Sep 17 00:00:00 2001
From: Shengliang Guan <slguan@taosdata.com>
Date: Mon, 19 Oct 2020 02:48:16 +0000
Subject: [PATCH] TD-1743

---
 src/mnode/src/mnodeTable.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index e100fc127b..8545e8790d 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1399,16 +1399,20 @@ int32_t mnodeRetrieveShowSuperTables(SShowObj *pShow, char *data, int32_t rows,
 void mnodeDropAllSuperTables(SDbObj *pDropDb) {
   void *  pIter= NULL;
   int32_t numOfTables = 0;
-  int32_t dbNameLen = strlen(pDropDb->name);
   SSuperTableObj *pTable = NULL;
 
+  char prefix[64] = {0};
+  tstrncpy(prefix, pDropDb->name, 64);
+  strcat(prefix, TS_PATH_DELIMITER);
+  int32_t prefixLen = strlen(prefix);
+
   mInfo("db:%s, all super tables will be dropped from sdb", pDropDb->name);
 
   while (1) {
     pIter = mnodeGetNextSuperTable(pIter, &pTable);
     if (pTable == NULL) break;
 
-    if (strncmp(pDropDb->name, pTable->info.tableId, dbNameLen) == 0) {
+    if (strncmp(prefix, pTable->info.tableId, prefixLen) == 0) {
       SSdbOper oper = {
         .type = SDB_OPER_LOCAL,
         .table = tsSuperTableSdb,
-- 
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