apache/incubator-gluten
Nov 2024 – Mar 2025
2 Months active
Languages Used
ScalaShell
Technical Skills
Backend DevelopmentData EngineeringSparkBuild ManagementCI/CDDependency Management
Jacky Lee
PROFILE
Jacky Lee
During four months, Junqing Li contributed to apache/spark and apache/incubator-gluten, focusing on backend and data engineering challenges. He improved Spark SQL by fixing a BigDecimal conversion bug, ensuring reliable handling of small-magnitude values. In apache/incubator-gluten, he stabilized ORC write paths for Spark 3.2/3.3 by removing unsupported features and adding a fallback, reducing deployment risk. He also modernized build management by upgrading Celeborn dependencies and refining CI/CD workflows. Li delivered a column pruning optimization for EXISTS joins in Spark’s DataSource V2, reducing I/O and improving query performance. His work demonstrated depth in Scala, Spark, and dependency management.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
4Total
Bugs
2
Commits
4
Features
2
Lines of code
114
Activity Months4
Your Network
479 people
Work History
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for apache/spark: Delivered a performance optimization for EXISTS joins in DataSource V2 by implementing column pruning to read only the necessary columns and by adjusting the optimizer to insert a Project node for EXISTS subqueries. This work included new unit tests validating the optimization and is captured under commit ba92e8ec8515b423b2fa6f95b7076b28ca6492b4 (SPARK-51831). Resulting changes reduce I/O for EXISTS-based queries, improve latency, and strengthen DS V2 capabilities in Spark SQL.
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for apache/spark: Delivered a performance optimization for EXISTS joins in DataSource V2 by implementing column pruning to read only the necessary columns and by adjusting the optimizer to insert a Project node for EXISTS subqueries. This work included new unit tests validating the optimization and is captured under commit ba92e8ec8515b423b2fa6f95b7076b28ca6492b4 (SPARK-51831). Resulting changes reduce I/O for EXISTS-based queries, improve latency, and strengthen DS V2 capabilities in Spark SQL.
September 2025
April 2025
1 Commits
Apr 1, 2025Concise monthly summary for April 2025 focused on a critical bug fix in Spark SQL numeric conversion and its business impact. Scope: Apache Spark (apache/spark) – BigDecimal conversion path in SQL processing.
April 2025
1 Commits
Apr 1, 2025Concise monthly summary for April 2025 focused on a critical bug fix in Spark SQL numeric conversion and its business impact. Scope: Apache Spark (apache/spark) – BigDecimal conversion path in SQL processing.
March 2025
1 Commits • 1 Features
Mar 1, 2025Month: 2025-03 | Focus: dependency modernization and build reliability in apache/incubator-gluten. Key feature delivered: Celeborn Dependency Version Upgrade to 0.5.4 across CI workflow configurations and Dockerfiles; removal of older 0.3.2-incubating to ensure the build uses the latest Celeborn release. Commit: f18a7fa473e3586fee07137a92fb8d744ee908a3 ([GLUTEN-8993][CELEBORN] Bump Celeborn version to 0.5.4 (#8994)). No major bugs fixed this month. Overall impact: aligns Gluten with Celeborn 0.5.4 to improve reliability, reproducibility, and compatibility of CI/builds. Technologies/skills demonstrated: dependency management, CI/CD configuration updates, Dockerfile maintenance, versioning discipline, cross-repo coordination.
1 Commits • 1 Features
Mar 1, 2025Month: 2025-03 | Focus: dependency modernization and build reliability in apache/incubator-gluten. Key feature delivered: Celeborn Dependency Version Upgrade to 0.5.4 across CI workflow configurations and Dockerfiles; removal of older 0.3.2-incubating to ensure the build uses the latest Celeborn release. Commit: f18a7fa473e3586fee07137a92fb8d744ee908a3 ([GLUTEN-8993][CELEBORN] Bump Celeborn version to 0.5.4 (#8994)). No major bugs fixed this month. Overall impact: aligns Gluten with Celeborn 0.5.4 to improve reliability, reproducibility, and compatibility of CI/builds. Technologies/skills demonstrated: dependency management, CI/CD configuration updates, Dockerfile maintenance, versioning discipline, cross-repo coordination.
March 2025
November 2024
1 Commits
Nov 1, 2024November 2024 monthly summary for apache/incubator-gluten. Focused on stabilizing the ORC write path for Spark 3.2/3.3 by removing unsupported write capabilities and adding a robust fallback, improving compatibility and uptime in production deployments.
November 2024
1 Commits
Nov 1, 2024November 2024 monthly summary for apache/incubator-gluten. Focused on stabilizing the ORC write path for Spark 3.2/3.3 by removing unsupported write capabilities and adding a robust fallback, improving compatibility and uptime in production deployments.
Activity
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Quality Metrics
Correctness95.0%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
ScalaShell
Technical Skills
Backend DevelopmentBig DataBuild ManagementCI/CDData EngineeringDependency ManagementSQLScalaSpark
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
apache/spark
Apr 2025 – Sep 2025
2 Months active
Languages Used
Scala
Technical Skills
Big DataScalaSparkData EngineeringSQL