From e5633b6ad3d1528e74fd3040195e513495d8a37b Mon Sep 17 00:00:00 2001
From: Shengliang Guan <slguan@taosdata.com>
Date: Mon, 19 Oct 2020 02:23:24 +0000
Subject: [PATCH] TD-1743 When deleting a database, tables in other databases
 may be deleted by mistake

---
 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 1a1ff878a5..e100fc127b 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -2224,16 +2224,20 @@ void mnodeDropAllChildTablesInVgroups(SVgObj *pVgroup) {
 void mnodeDropAllChildTables(SDbObj *pDropDb) {
   void *  pIter = NULL;
   int32_t numOfTables = 0;
-  int32_t dbNameLen = strlen(pDropDb->name);
   SChildTableObj *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 child tables will be dropped from sdb", pDropDb->name);
 
   while (1) {
     pIter = mnodeGetNextChildTable(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 = tsChildTableSdb,
-- 
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