From 2604a17fef44165ec56b2ab83c1425abc8619059 Mon Sep 17 00:00:00 2001
From: factosea <285808407@qq.com>
Date: Fri, 12 Jul 2024 12:04:23 +0800
Subject: [PATCH] fix: invalid operation

---
 source/libs/scalar/src/scalar.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/libs/scalar/src/scalar.c b/source/libs/scalar/src/scalar.c
index 8d1f8dd9b1..a9ee40f8b0 100644
--- a/source/libs/scalar/src/scalar.c
+++ b/source/libs/scalar/src/scalar.c
@@ -1650,8 +1650,8 @@ static int32_t sclGetCompOperatorResType(SOperatorNode *pOp) {
       return TSDB_CODE_TSC_INVALID_OPERATION;
     }
     SDataType rdt = ((SExprNode *)(pOp->pRight))->resType;
-    if (QUERY_NODE_VALUE != nodeType(pOp->pRight) || 
-      (rdt.type != TSDB_DATA_TYPE_NCHAR && rdt.type != TSDB_DATA_TYPE_VARCHAR && rdt.type != TSDB_DATA_TYPE_NULL)) {
+    if (QUERY_NODE_VALUE != nodeType(pOp->pRight) ||
+      (rdt.type != TSDB_DATA_TYPE_NCHAR && rdt.type != TSDB_DATA_TYPE_VARCHAR)) {
       return TSDB_CODE_TSC_INVALID_OPERATION;
     }
     if (nodesIsMatchRegularOp(pOp)) {