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Tomáš Linhart

PROFILE

Tomáš Linhart

Over seven months, this developer enhanced the DuckDB ecosystem by building and maintaining database extensions and improving documentation across multiple repositories, including duckdb/community-extensions and duckdb-web. They implemented the Elasticsearch SQL extension, enabling SQL queries and geospatial analytics on Elasticsearch indices using C++ and SQL, and delivered performance upgrades such as bind caching and HTTP optimizations. Their work included adding structured logging examples and introducing an HTTP stats extension for profiling. They also focused on documentation clarity, fixing typos and clarifying configuration merging in Markdown and YAML, which improved onboarding and reduced ambiguity for both users and contributors.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

15Total
Bugs
3
Commits
15
Features
7
Lines of code
158
Activity Months7

Work History

April 2026

1 Commits

Apr 1, 2026

April 2026: Delivered a targeted maintenance fix in the duckdb/community-extensions repo to preserve compatibility with the DuckDB Elasticsearch extension. Updated extension references to the latest commit to align with upstream changes, reducing the risk of runtime failures and upgrade friction. This work enhances reliability for downstream users and supports ongoing ecosystem stability.

March 2026

5 Commits • 2 Features

Mar 1, 2026

March 2026 (2026-03) monthly summary for duckdb/community-extensions. Delivered Elasticsearch extension enhancements with performance improvements (bind cache, libcurl-based HTTP client, HTTP request optimizations, improved logging), GeoJSON support for geo_point, and DuckDB compatibility upgrades (v1.5.0/1.5.1). Introduced HTTP stats extension for profiling and aligned code references with latest commits. Maintained extension settings and overall code health for maintainability and future feature work.

February 2026

2 Commits • 2 Features

Feb 1, 2026

February 2026 performance summary: Delivered two high-value features across two repositories, focusing on developer experience and analytics capabilities. Key deliverables include a structured logging example in plugin documentation to improve observability and troubleshooting, and the addition of geospatial query capabilities to the Elasticsearch extension, enabling spatial queries directly within DuckDB. Impact includes faster onboarding, clearer observability, and expanded geospatial analytics workflows for end users.

January 2026

2 Commits • 1 Features

Jan 1, 2026

January 2026 delivered targeted extensibility enhancements and a quality-of-documentation improvement across DuckDB repos, driving faster integration and stronger data federation capabilities for users and contributors. The month focused on delivering the Elasticsearch SQL extension and clarifying Community Extensions submission guidelines.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025 for ory/docs: Documentation enhancement to clarify configuration merging guidance in configuring.md; corrected grammatical issues and clarified how array values are handled during merging. No product code changes were required. This improvement supports faster onboarding, reduces misconfiguration risk, and lowers support queries related to configuration merging.

January 2025

3 Commits

Jan 1, 2025

January 2025: Focused on documentation quality improvements for the duckdb-web extension docs. Completed targeted typo fixes and formatting improvements across three files to enhance readability and developer onboarding.

December 2024

1 Commits • 1 Features

Dec 1, 2024

December 2024 performance summary for duckdb-web: delivered a targeted documentation improvement focused on Hive Partitioning to enhance readability and user experience with minimal risk.

Activity

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Quality Metrics

Correctness98.6%
Maintainability97.4%
Architecture97.4%
Performance97.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++MarkdownSQLTypeScriptYAML

Technical Skills

C++ developmentDocumentationDuckDBElasticsearchSQLTypeScriptYAML configurationbackend developmentdatabase developmentdatabase extensionsdatabase managementdocumentationextension developmentgeospatial data handlingplugin development

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

duckdb/community-extensions

Jan 2026 Apr 2026
4 Months active

Languages Used

C++SQLYAML

Technical Skills

ElasticsearchSQLdatabase developmentdatabase managementC++ developmentDuckDB

duckdb/duckdb-web

Dec 2024 Jan 2026
3 Months active

Languages Used

Markdown

Technical Skills

Documentationdocumentationtechnical writing

ory/docs

Mar 2025 Mar 2025
1 Month active

Languages Used

Markdown

Technical Skills

Documentation

sst/opencode

Feb 2026 Feb 2026
1 Month active

Languages Used

TypeScript

Technical Skills

TypeScriptdocumentationplugin development