From 09ce3b9ffe09342b5a7d8886619bcdfa7acb8bad Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Wed, 17 Aug 2022 11:25:32 +0800
Subject: [PATCH] fix(query): set proper ltrim/rtrim result schema bytes

TD-18431
---
 source/libs/scalar/src/scalar.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/libs/scalar/src/scalar.c b/source/libs/scalar/src/scalar.c
index d0c5a76f4b..0d36fa0845 100644
--- a/source/libs/scalar/src/scalar.c
+++ b/source/libs/scalar/src/scalar.c
@@ -758,7 +758,9 @@ EDealRes sclRewriteFunction(SNode** pNode, SScalarCtx *ctx) {
       res->datum.p = taosMemoryCalloc(len, 1);
       memcpy(res->datum.p, output.columnData->pData, len);
     } else if (IS_VAR_DATA_TYPE(type)) {
-      res->datum.p = taosMemoryCalloc(res->node.resType.bytes + VARSTR_HEADER_SIZE + 1, 1);
+      //res->datum.p = taosMemoryCalloc(res->node.resType.bytes + VARSTR_HEADER_SIZE + 1, 1);
+      res->datum.p = taosMemoryCalloc(varDataTLen(output.columnData->pData), 1);
+      res->node.resType.bytes = varDataTLen(output.columnData->pData);
       memcpy(res->datum.p, output.columnData->pData, varDataTLen(output.columnData->pData));
     } else {
       nodesSetValueNodeValue(res, output.columnData->pData);