apache/doris
Jun 2025 – May 2026
3 Months active
Languages Used
GroovyJavaSQLC++
Technical Skills
Backend DevelopmentCachingConfiguration ManagementData WarehousingDatabase IntegrationSQL
wlong
PROFILE
Wlong
Over a three-month period, this developer enhanced the apache/doris repository by delivering two major features and resolving two critical bugs. They implemented incremental reads for Paimon tables, enabling snapshot and timestamp-based querying, and introduced an expireAfterAccess-based caching policy to improve data freshness and query latency for hot data. Their work involved extensive testing and configuration management to ensure correctness and flexibility. Additionally, they addressed type-mismatch errors in Parquet data ingestion by enforcing consistent string casting, and improved Flight SQL ticket processing robustness. The solutions leveraged C++, Java, and SQL, focusing on backend development, caching, and data processing reliability.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
5Total
Bugs
2
Commits
5
Features
2
Lines of code
918
Activity Months3
Your Network
129 peopleWork History
May 2026
1 Commits
May 1, 2026May 2026: Focused on improving reliability and stability of Parquet data ingestion in the Doris repository by addressing a type-mismatch issue in the Parquet reader. The fix ensures dictionary-encoded columns are cast to string before processing, preventing cross-type comparison errors and reducing ingestion failures. This work aligns with ongoing efforts to improve data quality and pipeline resilience.
1 Commits
May 1, 2026May 2026: Focused on improving reliability and stability of Parquet data ingestion in the Doris repository by addressing a type-mismatch issue in the Parquet reader. The fix ensures dictionary-encoded columns are cast to string before processing, preventing cross-type comparison errors and reducing ingestion failures. This work aligns with ongoing efforts to improve data quality and pipeline resilience.
May 2026
December 2025
2 Commits
Dec 1, 2025December 2025: Delivered a targeted bug fix improving Flight SQL ticket processing robustness in Apache Doris. Addressed malformed ticket errors when SQL contains special characters (e.g., '&'), and enhanced error logging to provide richer context for easier troubleshooting. This work reduces ticket-related failures and improves production query reliability.
December 2025
2 Commits
Dec 1, 2025December 2025: Delivered a targeted bug fix improving Flight SQL ticket processing robustness in Apache Doris. Addressed malformed ticket errors when SQL contains special characters (e.g., '&'), and enhanced error logging to provide richer context for easier troubleshooting. This work reduces ticket-related failures and improves production query reliability.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for repository apache/doris. This period delivered two major features with emphasis on correctness, data freshness, and cache reliability. The work aligns with improving analytics capabilities and hot data responsiveness, with strong testing coverage to ensure correctness.
2 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for repository apache/doris. This period delivered two major features with emphasis on correctness, data freshness, and cache reliability. The work aligns with improving analytics capabilities and hot data responsiveness, with strong testing coverage to ensure correctness.
June 2025
Activity
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Quality Metrics
Correctness92.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++GroovyJavaSQL
Technical Skills
Backend DevelopmentC++C++ developmentCachingConfiguration ManagementData WarehousingDatabase IntegrationJavaSQLSystem DesignTestingbackend developmentdata processingparquet file handling
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline