From 8c7d2a0f032ae0a47dd1e0413cf4fa0de8c57c3e Mon Sep 17 00:00:00 2001
From: obdev <obdev@oceanbase.com>
Date: Mon, 17 Jun 2024 18:15:53 +0000
Subject: [PATCH] Fix core at fast parser

---
 src/sql/parser/ob_fast_parser.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/sql/parser/ob_fast_parser.cpp b/src/sql/parser/ob_fast_parser.cpp
index 78cee15f82..3c9735a9cc 100644
--- a/src/sql/parser/ob_fast_parser.cpp
+++ b/src/sql/parser/ob_fast_parser.cpp
@@ -2334,7 +2334,9 @@ inline void ObFastParserBase::remove_multi_stmt_end_space()
   for (; end_pos >= 0 && is_space(raw_sql_.char_at(end_pos)); --end_pos)
     ;
   copy_end_pos_ = end_pos + 1;
-  append_no_param_sql();
+  if (copy_end_pos_ > copy_begin_pos_) {
+    append_no_param_sql();
+  }
   copy_begin_pos_ = raw_sql_.cur_pos_;
   copy_end_pos_ = raw_sql_.cur_pos_;
 }