From 5d976a26a5d8457bc78f667a66385559e017b900 Mon Sep 17 00:00:00 2001
From: dapan1121 <89396746@qq.com>
Date: Mon, 25 Jan 2021 17:00:22 +0800
Subject: [PATCH] fix bug

---
 src/client/src/tscSQLParser.c | 9 ++++++---
 src/client/src/tscServer.c    | 4 +++-
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 0ccc54ff0d..a23c9b75bb 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -921,16 +921,19 @@ int32_t tscSetTableFullName(STableMetaInfo* pTableMetaInfo, SStrToken* pTableNam
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg1);
     }
   } else {  // get current DB name first, and then set it into path
-    char* t = getCurrentDBName(pSql);
+    char* t = cloneCurrentDBName(pSql);
     if (strlen(t) == 0) {
       return TSDB_CODE_TSC_DB_NOT_SELECTED;
     }
 
     code = tNameFromString(&pTableMetaInfo->name, t, T_NAME_ACCT | T_NAME_DB);
     if (code != 0) {
+      free(t);
       return TSDB_CODE_TSC_DB_NOT_SELECTED;
     }
 
+    free(t);
+
     if (pTableName->n >= TSDB_TABLE_NAME_LEN) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg1);
     }
@@ -1244,8 +1247,8 @@ static bool has(SArray* pFieldList, int32_t startIdx, const char* name) {
 
 static char* getAccountId(SSqlObj* pSql) { return pSql->pTscObj->acctId; }
 
-static char* getCurrentDBName(SSqlObj* pSql) {
-  return pSql->pTscObj->db;
+static char* cloneCurrentDBName(SSqlObj* pSql) {
+  return strdup(pSql->pTscObj->db);
 }
 
 /* length limitation, strstr cannot be applied */
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 8403876566..1ea19d5198 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -2165,7 +2165,9 @@ int tscProcessUseDbRsp(SSqlObj *pSql) {
 }
 
 int tscProcessDropDbRsp(SSqlObj *pSql) {
-  pSql->pTscObj->db[0] = 0;
+  //TODO LOCK DB WHEN MODIFY IT
+  //pSql->pTscObj->db[0] = 0;
+  
   taosHashEmpty(tscTableMetaInfo);
   return 0;
 }
-- 
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