prestodb/presto
Nov 2024 – Mar 2026
8 Months active
Languages Used
JavarstRSTMarkdown
Technical Skills
Dependency ManagementDocumentationSecurity PatchingAuthentication SystemsBackend DevelopmentDatabase Interaction
Sayari Mukherjee
PROFILE
Sayari Mukherjee
Sayari Mukherjee contributed to the prestodb/presto repository by engineering features and fixes that enhanced security, cloud integration, and data reliability. She implemented pluggable authentication systems and S3 Web Identity support, enabling secure, flexible access to cloud resources using Java and AWS SDK. Her work included upgrading dependencies to remediate CVEs, modernizing Iceberg and Pinot integrations for compatibility and security, and improving MongoDB connector security with TLS. Sayari also addressed cross-database compatibility in Hive Metastore and resolved Delta Lake snapshot bugs, demonstrating depth in backend development, configuration management, and data engineering while maintaining clear documentation and robust integration testing practices.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
10Total
Bugs
4
Commits
10
Features
6
Lines of code
1,989
Activity Months8
Your Network
196 peopleWork History
March 2026
1 Commits
Mar 1, 2026March 2026: Delta Lake Connector snapshot state reading bug fix for prestodb/presto; upgraded Delta Kernel API; ensured correct data retrieval from Delta Lake tables even when checkpoint files are present; resolved a ClassNotFoundException in Hadoop S3AFileSystem during snapshot processing; overall impact: increased reliability and data accuracy for Delta Lake-backed queries.
1 Commits
Mar 1, 2026March 2026: Delta Lake Connector snapshot state reading bug fix for prestodb/presto; upgraded Delta Kernel API; ensured correct data retrieval from Delta Lake tables even when checkpoint files are present; resolved a ClassNotFoundException in Hadoop S3AFileSystem during snapshot processing; overall impact: increased reliability and data accuracy for Delta Lake-backed queries.
March 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 — Delivered security-focused Pinot integration enhancements in prestodb/presto. Implemented Pinot 1.4.0 upgrade with a secure override of the vulnerable lz4-java dependency to address CVE-2025-66566 and align with the updated gRPC interface. Updated internal code paths to reflect API changes (GrpcQueryClient -> ServerGrpcQueryClient; GrpcRequestBuilder -> ServerGrpcRequestBuilder) and adjusted DataTableBuilder.setColumn() accordingly. Validated changes through internal branch tests and sample Pinot-backed queries to ensure correctness and compatibility. Result: improved security posture, preserved functionality, and prepared groundwork for ongoing Pinot 1.4.0 adoption.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 — Delivered security-focused Pinot integration enhancements in prestodb/presto. Implemented Pinot 1.4.0 upgrade with a secure override of the vulnerable lz4-java dependency to address CVE-2025-66566 and align with the updated gRPC interface. Updated internal code paths to reflect API changes (GrpcQueryClient -> ServerGrpcQueryClient; GrpcRequestBuilder -> ServerGrpcRequestBuilder) and adjusted DataTableBuilder.setColumn() accordingly. Validated changes through internal branch tests and sample Pinot-backed queries to ensure correctness and compatibility. Result: improved security posture, preserved functionality, and prepared groundwork for ongoing Pinot 1.4.0 adoption.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for prestodb/presto: Delivered secure MongoDB connectivity by adding TLS configuration support to the MongoDB connector. Replaced deprecated SSL with TLS, extended MongoClientConfig with keystore/truststore paths and passwords, and updated docs and configuration classes. Demonstrated secure-by-default practices and improved maintainability. This work strengthens data-in-transit protection for MongoDB deployments and aligns with security standards. Collaborative effort with Anant Aneja; associated commit 24c39e0b366a7f610cde1fbbcd57450ece94cf71 (#25374).
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for prestodb/presto: Delivered secure MongoDB connectivity by adding TLS configuration support to the MongoDB connector. Replaced deprecated SSL with TLS, extended MongoClientConfig with keystore/truststore paths and passwords, and updated docs and configuration classes. Demonstrated secure-by-default practices and improved maintainability. This work strengthens data-in-transit protection for MongoDB deployments and aligns with security standards. Collaborative effort with Anant Aneja; associated commit 24c39e0b366a7f610cde1fbbcd57450ece94cf71 (#25374).
October 2025
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025: No major bugs fixed this month; primary focus on compatibility modernization for Presto Iceberg with MinIO by migrating to AWS SDK v2. Completed migration and configuration updates to ensure reliable operation with MinIO deployments, reducing deployment friction and future maintenance risk. The change is captured in commit 938ccf69e559ad1bf65e42b955a047370dcf74eb in prestodb/presto. This work improves interoperability across on-prem and cloud MinIO environments and lays groundwork for future Iceberg enhancements.
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025: No major bugs fixed this month; primary focus on compatibility modernization for Presto Iceberg with MinIO by migrating to AWS SDK v2. Completed migration and configuration updates to ensure reliable operation with MinIO deployments, reducing deployment friction and future maintenance risk. The change is captured in commit 938ccf69e559ad1bf65e42b955a047370dcf74eb in prestodb/presto. This work improves interoperability across on-prem and cloud MinIO environments and lays groundwork for future Iceberg enhancements.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for prestodb/presto focusing on business value and technical achievements. Implemented S3 Web Identity Authentication to enable web identity-based access to S3 data sources, improving security and reducing credential management overhead. Introduced config hive.s3.web.identity.auth.enabled and integrated WebIdentityTokenCredentialsProvider to authenticate using web identity tokens, requiring an IAM role when enabled. Commit 3b9e0f153310cdfc138dab8ca63fdeccecc05a2c implemented the feature. No major bugs reported this period; groundwork laid for IAM role-based access in AWS environments like EKS.
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for prestodb/presto focusing on business value and technical achievements. Implemented S3 Web Identity Authentication to enable web identity-based access to S3 data sources, improving security and reducing credential management overhead. Introduced config hive.s3.web.identity.auth.enabled and integrated WebIdentityTokenCredentialsProvider to authenticate using web identity tokens, requiring an IAM role when enabled. Commit 3b9e0f153310cdfc138dab8ca63fdeccecc05a2c implemented the feature. No major bugs reported this period; groundwork laid for IAM role-based access in AWS environments like EKS.
February 2025
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 (Month: 2025-01) – Prestodb/presto: Delivered security-focused capability with pluggable custom authenticators, enabling administrators to configure and use custom authentication plugins via server integration and enhanced documentation. Addressed Hive Metastore reliability across databases with a bug fix that improves view discovery. Summary of scope and impact follows. What was delivered: - Pluggable Custom Authenticators (Feature): Introduced a pluggable authentication framework in the Presto server, with documentation for administrators and integration points to enable custom authentication plugins. Commit: 6b2683c844f5d993669bd5176642ebe15391fd21. Co-authored-by: Namya Sehgal. - Documentation enhancements: Added administrator-focused documentation to guide configuration and use of custom authenticators, ensuring operability and secure deployment. Bug fixes: - Hive Metastore Views Retrieval Compatibility Bug (Bug): Fixed unreliable retrieval of views from Hive metastore across databases (e.g., Derby, Oracle) by switching the getAllViews predicate from '=' to 'LIKE' to accommodate databases that do not support equals on CLOB parameters, improving cross-database compatibility and view discovery. Commit: 1176ffd2a8ba8c73d7bf5944b7707840db37d43a Overall impact and accomplishments: - Security posture enhanced with flexible authentication options; administrators can adopt custom auth plugins without changing core server code. - Increased reliability and discoverability of Hive metastore views across database backends, reducing operational surprises during view discovery. - Strengthened cross-team collaboration with clear documentation and reference commits. Technologies/skills demonstrated: - Java/server plugin architecture, module integration, and extensibility patterns. - Cross-database compatibility considerations, especially around CLOB parameter handling. - Documentation authoring and collaboration (admin docs, co-authorship). - Code quality through targeted bug fix and feature development with traceable commits.
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 (Month: 2025-01) – Prestodb/presto: Delivered security-focused capability with pluggable custom authenticators, enabling administrators to configure and use custom authentication plugins via server integration and enhanced documentation. Addressed Hive Metastore reliability across databases with a bug fix that improves view discovery. Summary of scope and impact follows. What was delivered: - Pluggable Custom Authenticators (Feature): Introduced a pluggable authentication framework in the Presto server, with documentation for administrators and integration points to enable custom authentication plugins. Commit: 6b2683c844f5d993669bd5176642ebe15391fd21. Co-authored-by: Namya Sehgal. - Documentation enhancements: Added administrator-focused documentation to guide configuration and use of custom authenticators, ensuring operability and secure deployment. Bug fixes: - Hive Metastore Views Retrieval Compatibility Bug (Bug): Fixed unreliable retrieval of views from Hive metastore across databases (e.g., Derby, Oracle) by switching the getAllViews predicate from '=' to 'LIKE' to accommodate databases that do not support equals on CLOB parameters, improving cross-database compatibility and view discovery. Commit: 1176ffd2a8ba8c73d7bf5944b7707840db37d43a Overall impact and accomplishments: - Security posture enhanced with flexible authentication options; administrators can adopt custom auth plugins without changing core server code. - Increased reliability and discoverability of Hive metastore views across database backends, reducing operational surprises during view discovery. - Strengthened cross-team collaboration with clear documentation and reference commits. Technologies/skills demonstrated: - Java/server plugin architecture, module integration, and extensibility patterns. - Cross-database compatibility considerations, especially around CLOB parameter handling. - Documentation authoring and collaboration (admin docs, co-authorship). - Code quality through targeted bug fix and feature development with traceable commits.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for prestodb/presto focused on security hardening and dependency hygiene. Implemented a security patch to remove a vulnerable Hibernate Validator (6.2.0.Final) due to CVEs, delivered via a targeted dependency exclusion with minimal risk to functionality.
1 Commits
Dec 1, 2024December 2024 monthly summary for prestodb/presto focused on security hardening and dependency hygiene. Implemented a security patch to remove a vulnerable Hibernate Validator (6.2.0.Final) due to CVEs, delivered via a targeted dependency exclusion with minimal risk to functionality.
December 2024
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024 was focused on strengthening security posture and improving deployment guidance for prestodb/presto through targeted documentation updates and critical dependency remediation. The work delivered clearer authentication configuration instructions and mitigated security risks by upgrading vulnerable Lucene components, aligning with best practices for secure, maintainable codebases.
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024 was focused on strengthening security posture and improving deployment guidance for prestodb/presto through targeted documentation updates and critical dependency remediation. The work delivered clearer authentication configuration instructions and mitigated security risks by upgrading vulnerable Lucene components, aligning with best practices for secure, maintainable codebases.
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Quality Metrics
Correctness92.0%
Maintainability89.0%
Architecture87.0%
Performance77.0%
AI Usage22.0%
Skills & Technologies
Programming Languages
JavaMarkdownRSTrst
Technical Skills
AWSAWS SDKApache HadoopAuthenticationAuthentication SystemsBackend DevelopmentCloud ComputingConfiguration ManagementData LakeDatabase InteractionDelta LakeDependency ManagementDocumentationFull Stack DevelopmentIntegration Testing
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