From 020a37a9a81d8728f425f837011419ef4e99b64f Mon Sep 17 00:00:00 2001
From: AlexDuan <417921451@qq.com>
Date: Wed, 29 Sep 2021 11:35:30 +0800
Subject: [PATCH] add comment for overflow

---
 src/query/src/qExecutor.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 982996d70d..78d4aabdd8 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -8914,6 +8914,7 @@ static void doSetTagValueToResultBuf(char* output, const char* val, int16_t type
 
   if (IS_VAR_DATA_TYPE(type)) {
     // Binary data overflows for sort of unknown reasons. Let trim the overflow data
+    // overflow one reason is client tag length is less than server tag length
     if (varDataTLen(val) > bytes) {
       int32_t maxLen = bytes - VARSTR_HEADER_SIZE;
       int32_t len = (varDataLen(val) > maxLen)? maxLen:varDataLen(val);
-- 
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