September 2025 delivered end-to-end enhancements for map data handling in Doris, pairing core feature work with user documentation to accelerate adoption and business value. Core feature delivery introduced two new SQL map utilities—map_entries and map_contains_entry—for querying and manipulating maps: map_entries converts a map to an array of key-value structs, while map_contains_entry checks for a specific key-value pair. Implemented in apache/doris (commit a950edff82d3e6c63e60e75d29acbae20a97abe4) with related PR #54036. Notes: null inputs return null; map_contains_entry does not support nested type comparisons, consistent with array_contains. Documentation for the new functions was added to the SQL Function Documentation in apache/doris-website, commit 176752cdb01e51918665af2f2221d26ff4e092b0, PR #2779, including English and Chinese examples to improve clarity and onboarding. Overall impact: Expanded SQL capabilities for map data, enabling richer analytics and easier usage for developers and analysts. Improved maintainability and user experience by aligning code with comprehensive docs across repos. Demonstrated end-to-end delivery and cross-repo collaboration, reinforcing velocity and trust with the user community. Technologies/skills demonstrated: SQL function design and extension, map data structure reasoning, commit-and-PR workflow, cross-repo collaboration, technical documentation, bilingual user guidance.