HappenLee commented on a change in pull request #7558:
URL: https://github.com/apache/incubator-doris/pull/7558#discussion_r780188135



##########
File path: be/src/olap/row_cursor.cpp
##########
@@ -28,19 +28,6 @@ using std::string;
 using std::vector;
 
 namespace doris {
-RowCursor::RowCursor()
-        : _fixed_len(0), _variable_len(0), _string_field_count(0), 
_long_text_buf(nullptr) {}
-
-RowCursor::~RowCursor() {
-    delete[] _owned_fixed_buf;
-    delete[] _variable_buf;
-    if (_string_field_count > 0 && _long_text_buf != nullptr) {
-        for (int i = 0; i < _string_field_count; ++i) {
-            free(_long_text_buf[i]);

Review comment:
       the long_text_buf should release one by one. because string type will 
realloc the mem 




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