xiaokang commented on code in PR #45126:
URL: https://github.com/apache/doris/pull/45126#discussion_r1875121634
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be/src/util/mysql_row_buffer.cpp:
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@@ -107,7 +107,11 @@ MysqlRowBuffer<is_binary_format>::~MysqlRowBuffer() {
template <bool is_binary_format>
void MysqlRowBuffer<is_binary_format>::open_dynamic_mode() {
if (!_dynamic_mode) {
- *_pos++ = NEXT_EIGHT_BYTE;
+ // if _pos now exactly at the end of _buf memory,
+ // we should reserve 1 byte for _dynamic_mode flag byte to avoid *pos
= 254
+ // cause _dynamic_mode flag byte be overwritten
+ reserve(1);
+ *_pos++ = NEXT_EIGHT_BYTE; // *_pos = 254 ; _pos++
Review Comment:
Can you check that is there any more place should reserve() be called before
*_pos++ ?
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