From 6d2823218967d7fb893d05a3378a0bddf1c6aad6 Mon Sep 17 00:00:00 2001
From: Xiaoyu Wang <xiaoyuwang@taosdata.com>
Date: Mon, 12 Dec 2022 17:14:08 +0800
Subject: [PATCH] fix: create stream error

---
 source/libs/parser/src/parTranslater.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index c0c9d01bf3..d4feef6cb4 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -5516,7 +5516,10 @@ static void getStreamQueryFirstProjectAliasName(SHashObj* pUserAliasSet, char* a
     snprintf(aliasName, len, "%s", "ts");
     return;
   }
-  taosRandStr(aliasName, len);
+  do {
+    taosRandStr(aliasName, len - 1);
+    aliasName[len - 1] = '\0';
+  } while (NULL != taosHashGet(pUserAliasSet, aliasName, strlen(aliasName)));
   return;
 }