From aaacedf7bd443c800e9e1346d5c9254d6f68487d Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Wed, 31 Mar 2021 21:18:05 +0800
Subject: [PATCH] [td-3621]

---
 src/client/src/tscSQLParser.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 89de44fe45..34c4d83c7f 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -3293,7 +3293,8 @@ static int32_t extractColumnFilterInfo(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SC
     }
     
     if (pSchema->type == TSDB_DATA_TYPE_BOOL) {
-      if (pExpr->tokenId != TK_EQ && pExpr->tokenId != TK_NE) {
+      int32_t t = pExpr->tokenId;
+      if (t != TK_EQ && t != TK_NE && t != TK_NOTNULL && t != TK_ISNULL) {
         return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
       }
     }
-- 
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