apache/calcite
Sep 2024 – Jan 2026
2 Months active
Languages Used
Java
Technical Skills
JavaSQLSoftware DevelopmentTestingUnit Testing
ehds
PROFILE
Ehds
Worked on the apache/calcite repository to enhance SQL query translation and improve query planner reliability. Developed support for SqlWindowTableFunction in the RelToSql Converter, enabling accurate conversion of window functions in SQL queries by introducing new context handling and updating SQL generation logic using Java and SQL. Addressed two critical bugs affecting timestamp normalization and NULL handling in FILTER_REDUCE_EXPRESSIONS, adding regression tests to ensure ongoing correctness. Focused on software development, testing, and unit testing practices to deliver more robust query planning and data accuracy, resulting in more predictable query results and reduced production issues for downstream users.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
3Total
Bugs
2
Commits
3
Features
1
Lines of code
150
Activity Months2
Your Network
111 peopleWork History
January 2026
2 Commits
Jan 1, 2026January 2026: Two critical bug fixes in apache/calcite focused on correctness and stability, with regression tests to lock them in. No new user-facing features were released this month. The work improves data accuracy and the reliability of the query planner, reducing production issues and enabling more predictable query results for NULL-containing expressions and timestamp normalization.
2 Commits
Jan 1, 2026January 2026: Two critical bug fixes in apache/calcite focused on correctness and stability, with regression tests to lock them in. No new user-facing features were released this month. The work improves data accuracy and the reliability of the query planner, reducing production issues and enabling more predictable query results for NULL-containing expressions and timestamp normalization.
January 2026
September 2024
1 Commits • 1 Features
Sep 1, 2024Month: 2024-09 — Focused on expanding Calcite's SQL generation capabilities by adding support for SqlWindowTableFunction in the RelToSql Converter for the apache/calcite repository. This work enables proper translation of SQL queries that use window functions into executable SQL, enhancing analytical query support and downstream compatibility.
September 2024
1 Commits • 1 Features
Sep 1, 2024Month: 2024-09 — Focused on expanding Calcite's SQL generation capabilities by adding support for SqlWindowTableFunction in the RelToSql Converter for the apache/calcite repository. This work enables proper translation of SQL queries that use window functions into executable SQL, enhancing analytical query support and downstream compatibility.
Activity
Loading activity data...
Quality Metrics
Correctness100.0%
Maintainability86.6%
Architecture93.4%
Performance86.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
JavaSQLSoftware DevelopmentTestingUnit Testing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline