fix: need not obtain db name if input argument include -s

tools/shell/src/shellAuto.c

@@ -332,6 +332,7 @@ bool varMode = false;  // enter var names list mode
 
 TAOS*      varCon = NULL;
 SShellCmd* varCmd = NULL;
+bool       varRunOnce = false;
 SMatch*    lastMatch = NULL;  // save last match result
 int        cntDel = 0;        // delete byte count after next press tab
 
@@ -637,10 +638,11 @@ bool shellAutoInit() {
 }
 
 // set conn
-void shellSetConn(TAOS* conn) { 
+void shellSetConn(TAOS* conn, bool runOnce) {
   varCon = conn;
+  varRunOnce = runOnce;
   // init database and stable
-  updateTireValue(WT_VAR_DBNAME, false);
+  if (!runOnce) updateTireValue(WT_VAR_DBNAME, false);
 }
 
 // exit shell auto funciton, shell exit call once
@@ -784,6 +786,12 @@ int writeVarNames(int type, TAOS_RES* tres) {
   return numOfRows;
 }
 
+void setThreadNull(int type) {
+  taosThreadMutexLock(&tiresMutex);
+  threads[type] = NULL;
+  taosThreadMutexUnlock(&tiresMutex);
+}
+
 bool firstMatchCommand(TAOS* con, SShellCmd* cmd);
 //
 //  thread obtain var thread from db server
@@ -799,6 +807,7 @@ void* varObtainThread(void* param) {
   TAOS_RES* pSql = taos_query(varCon, varSqls[type]);
   if (taos_errno(pSql)) {
     taos_free_result(pSql);
+    setThreadNull(type);
     return NULL;
   }
 
@@ -814,6 +823,7 @@ void* varObtainThread(void* param) {
     firstMatchCommand(varCon, varCmd);
   }
 
+  setThreadNull(type);
   return NULL;
 }
 
@@ -1977,7 +1987,7 @@ void callbackAutoTab(char* sqlstr, TAOS* pSql, bool usedb) {
 
   if (dealUseDB(sql)) {
     // change to new db
-    updateTireValue(WT_VAR_STABLE, false);
+    if (varRunOnce) updateTireValue(WT_VAR_STABLE, false);
     return;
   }
 

tools/shell/src/shellEngine.c

@@ -1097,10 +1097,11 @@ int32_t shellExecute() {
   }
 #endif
 
-  shellSetConn(shell.conn);
+  bool runOnce = pArgs->commands != NULL || pArgs->file[0] != 0;
+  shellSetConn(shell.conn, runOnce);
   shellReadHistory();
 
-  if (pArgs->commands != NULL || pArgs->file[0] != 0) {
+  if (runOnce) {
     if (pArgs->commands != NULL) {
       printf("%s%s\r\n", shell.info.promptHeader, pArgs->commands);
       char *cmd = strdup(pArgs->commands);
@@ -1116,6 +1117,7 @@ int32_t shellExecute() {
 		ws_close(shell.ws_conn);
 	} else {
 #endif
+    taos_kill_query(shell.conn);
 		taos_close(shell.conn);
 #ifdef WEBSOCKET
 	}