From bb8e49ab46889945cc13f57703efeed04f9980a4 Mon Sep 17 00:00:00 2001
From: wpan <wpan@taosdata.com>
Date: Fri, 17 Sep 2021 17:35:41 +0800
Subject: [PATCH] fix bug

---
 src/client/src/tscSQLParser.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index f244e01a09..5b239d3bfb 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -4663,6 +4663,9 @@ int32_t getQueryCondExpr(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExpr** pExpr
     }
 
     *type = rightType;
+
+    *tbIdx = (leftTbIdx == rightTbIdx) ? leftTbIdx : -1;
+    
     return TSDB_CODE_SUCCESS;
   }
 
-- 
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