Worked on the crossoverJie/starrocks repository to address a critical issue in the Segment Iterator’s pruning path, focusing on correctness and stability. Delivered a targeted bug fix in C++ that ensured pruned columns were resized to match unpruned columns, thereby maintaining data integrity during filtered-column processing. This adjustment prevented inconsistencies in segment reads caused by mismatched column sizes, enhancing reliability under column pruning scenarios. The work centered on the Segment Iterator resizing logic, with no new features introduced during the period. Demonstrated skills in bug fixing, columnar storage, and data integrity, contributing to overall code health and maintainability.