Dilip Biswal
Pleasanton, California, United States
Summary
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RockstarDilip Biswal is a Software Engineer with 10 years of experience in backend systems and data processing, based in Chengalpattu, Tamil Nadu. He is an active open-source contributor to Apache Spark and Apache Iceberg, having implemented MERGE INTO support for Spark SQL and added EXCEPT ALL / INTERSECT ALL query rewrites. His work emphasizes query planning, row-level operations, distribution and sorting, and resolving subtle subquery and join corner cases to improve correctness and performance in distributed query engines. At High Tech he brings this engine-level expertise to production systems, bridging data engineering and core execution work to deliver scalable, reliable SQL features.
10 years of coding experience
Github Skills (15)
data-engineering10
scala10
ice10
javas10
apache-spark10
query-optimization10
spark10
apache210
apache10
sql10
back-end-development10
java10
data-processing10
apache-iceberg10
scala210
Programming languages (5)
Github contributions (5)
apache/spark
Nov 2015 - Jun 2020
Apache Spark - A unified analytics engine for large-scale data processing
Role in this project:
Back-end Developer & Data Engineer
Back-end Developer & Data EngineerContributions:3 reviews, 7 commits, 181 PRs in 4 years 8 months
Contributions summary:Dilip made multiple contributions to the Apache Spark project, focusing primarily on SQL and data processing aspects. The commits addressed issues related to SQL query optimization, bug fixes for corner cases with subqueries, join operations, and handling of set operations. Furthermore, the user added support for new features in SQL, such as `EXCEPT ALL` and `INTERSECT ALL`, by implementing query rewrites. The contributions demonstrate a strong understanding of query planning, SQL syntax, and optimization techniques within the Spark framework.
analyticspythondata-processingsqlapache
apache/iceberg
Jan 2021 - Feb 2021
Apache Iceberg
Role in this project:Back-end Developer
Back-end DeveloperContributions:57 reviews, 7 commits, 7 PRs in 18 days
Contributions summary:Dilip primarily contributed to the Apache Iceberg project, focusing on enhancements related to the Spark SQL integration. Their work included implementing support for the MERGE INTO operation, including handling various cases such as inserts, updates, and deletes, and addressing potential issues like ambiguous target row changes. The user also added functionality for distribution and sorting in MERGE queries and introduced a truncate expression for sorting. Additionally, they optimized conditions in row-level operations.
apache-icebergapachebig-datadatastreamjava
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