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[fix](mysql)fix mysql row buffer open_dynamic_mode make _pos pointer out range of _buf #38149

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merged 3 commits into from
Jul 28, 2024
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[fix](mysql)fix mysql row buffer open_dynamic_mode make _pos pointer out range of _buf #38149

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3ee21bd
fix
amorynan Jul 19, 2024
86ff94d
fix groovy
amorynan Jul 25, 2024
dcf18ba
fixed
amorynan Jul 25, 2024
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3 changes: 2 additions & 1 deletion be/src/util/mysql_row_buffer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@ namespace doris {
static uint8_t NEXT_TWO_BYTE = 252;
static uint8_t NEXT_THREE_BYTE = 253;
static uint8_t NEXT_EIGHT_BYTE = 254;
static size_t EXTRA_RESERVE_BYTE = 16;

// the first byte:
// <= 250: length
Expand Down Expand Up @@ -133,7 +134,7 @@ int MysqlRowBuffer<is_binary_format>::reserve(int64_t size) {
return 0;
}

int64_t alloc_size = std::max(need_size, _buf_size * 2);
int64_t alloc_size = std::max(need_size, _buf_size * 2) + EXTRA_RESERVE_BYTE;
char* new_buf = new (std::nothrow) char[alloc_size];

if (nullptr == new_buf) {
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