From 016d176ea5f40c640110af5650aafc33d12eb077 Mon Sep 17 00:00:00 2001
From: dapan1121 <wpan@taosdata.com>
Date: Fri, 1 Nov 2024 08:55:03 +0800
Subject: [PATCH] fix: number to string output length issue

---
 source/libs/scalar/src/sclfunc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index d01a5ed7ab..9e75abcfe8 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -2085,7 +2085,7 @@ int32_t castFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutp
           (void)memcpy(varDataVal(output), convBuf, len);
           varDataSetLen(output, len);
         } else {
-          int32_t outputSize = TMIN(outputLen - VARSTR_HEADER_SIZE, bufSize);
+          int32_t outputSize = (outputLen - VARSTR_HEADER_SIZE) < bufSize ? (outputLen - VARSTR_HEADER_SIZE + 1): bufSize;
           NUM_TO_STRING(inputType, input, outputSize, buf);
           int32_t len = (int32_t)strlen(buf);
           len = (outputLen - VARSTR_HEADER_SIZE) > len ? len : (outputLen - VARSTR_HEADER_SIZE);