ehrbase/ehrbase
May 2024 – Feb 2026
18 Months active
Languages Used
JavaMarkdownSQLYAML
Technical Skills
JavaSQLback end developmentbackend developmentAPI IntegrationAQL
Holger Reise
PROFILE
Holger Reise
Holger Reise developed and maintained core backend features for the ehrbase/ehrbase repository, focusing on robust AQL query processing, data aggregation, and database optimization. He refactored the AQL engine for maintainability, improved query translation and performance, and enhanced RM object handling to ensure data integrity and reliable retrieval. Using Java and SQL, Holger implemented deterministic data processing, streamlined migration scripts, and strengthened test coverage for safer releases. His work included optimizing build automation and CI/CD pipelines, updating SDK dependencies, and refining error handling. These efforts resulted in a more stable, maintainable codebase and improved reliability for electronic health record systems.
Overall Statistics
Feature vs Bugs
76%Features
Repository Contributions
126Total
Bugs
12
Commits
126
Features
39
Lines of code
9,063
Activity Months18
Your Network
15 peopleSame Organization
@vitagroup.ag7
Alexander LehnertMember
AlexandruMember
Levente GalMember
Maté StrysewskeMember
MBAMember
stefanspiskaMember
vinzenz.muellerMember
Shared Repositories
8
Work History
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for ehrbase/ehrbase focusing on composition handling improvements. Delivered Composition Locatable Utilities Refactoring to replace direct CompositionDto usage with LocatableUtils, centralized locatable operations, and improved composition UID retrieval in CompositionController. This refactor reduces duplication, increases reliability, and lays groundwork for future history-related enhancements. Implemented via two commits: dba3cfdd1f6968b1440ce59ee40d309bfcf915f0 (CDR-2204 cleanup: replaced CompositionDto usage with LocatableUtils calls; centralized common operations on Locatables) and c4f3f42fc900be43a6f8b8cd04caf0b433a7bc5c (CDR-2244 Adjustments move_composition_history).
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for ehrbase/ehrbase focusing on composition handling improvements. Delivered Composition Locatable Utilities Refactoring to replace direct CompositionDto usage with LocatableUtils, centralized locatable operations, and improved composition UID retrieval in CompositionController. This refactor reduces duplication, increases reliability, and lays groundwork for future history-related enhancements. Implemented via two commits: dba3cfdd1f6968b1440ce59ee40d309bfcf915f0 (CDR-2204 cleanup: replaced CompositionDto usage with LocatableUtils calls; centralized common operations on Locatables) and c4f3f42fc900be43a6f8b8cd04caf0b433a7bc5c (CDR-2244 Adjustments move_composition_history).
February 2026
January 2026
7 Commits • 2 Features
Jan 1, 2026Concise monthly summary for 2026-01 for ehrbase/ehrbase focusing on key features delivered, major bugs fixed, overall impact, and demonstrated technologies/skills. Focus on business value and concrete deliverables with commit references where relevant.
January 2026
7 Commits • 2 Features
Jan 1, 2026Concise monthly summary for 2026-01 for ehrbase/ehrbase focusing on key features delivered, major bugs fixed, overall impact, and demonstrated technologies/skills. Focus on business value and concrete deliverables with commit references where relevant.
December 2025
5 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for ehrbase/ehrbase: delivered a critical bug fix and a parsing enhancement that improve data integrity, reliability, and downstream business value.
5 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for ehrbase/ehrbase: delivered a critical bug fix and a parsing enhancement that improve data integrity, reliability, and downstream business value.
December 2025
November 2025
2 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Focused on performance and maintainability improvements to AQL result processing in ehrbase/ehrbase. Delivered a re-engineered AQL result processing pipeline with clearer object handling and streamlined data paths; refactored JSON parsing and object reconstruction logic to boost throughput and reduce latency. No major bugs fixed this month; the work centered on a targeted refactor that enhances stability and future maintainability. Business impact includes faster AQL responses, reduced maintenance burden, and improved developer productivity.
November 2025
2 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Focused on performance and maintainability improvements to AQL result processing in ehrbase/ehrbase. Delivered a re-engineered AQL result processing pipeline with clearer object handling and streamlined data paths; refactored JSON parsing and object reconstruction logic to boost throughput and reduce latency. No major bugs fixed this month; the work centered on a targeted refactor that enhances stability and future maintainability. Business impact includes faster AQL responses, reduced maintenance burden, and improved developer productivity.
October 2025
9 Commits • 4 Features
Oct 1, 2025In Oct 2025, ehrbase/ehrbase advanced AQL query handling and RM-DB data parsing, delivering stable features, improved performance, and SDK alignment. Highlights include integrating AqlQueryRequest into AqlQueryContext across implementations with test stabilization, RM-DB parsing and alias resolution enhancements, a static, more generic AqlSqlQueryBuilder explain method, and updated changelog with an SDK upgrade to 2.27.0. These efforts improve query correctness, data format robustness, and cross-context reuse, enabling broader input support and faster development cycles.
9 Commits • 4 Features
Oct 1, 2025In Oct 2025, ehrbase/ehrbase advanced AQL query handling and RM-DB data parsing, delivering stable features, improved performance, and SDK alignment. Highlights include integrating AqlQueryRequest into AqlQueryContext across implementations with test stabilization, RM-DB parsing and alias resolution enhancements, a static, more generic AqlSqlQueryBuilder explain method, and updated changelog with an SDK upgrade to 2.27.0. These efforts improve query correctness, data format robustness, and cross-context reuse, enabling broader input support and faster development cycles.
October 2025
September 2025
5 Commits • 3 Features
Sep 1, 2025September 2025 — ehrbase/ehrbase: Focused on code quality, reliable AQL processing, and robust streaming/JSON handling to improve reliability, debugging, and maintainability. Delivered non-functional code cleanup, corrected AQL translation handling, and internal refactors that enable scalable streaming and more robust JSON insertions. These changes reduce maintenance costs, improve translation correctness, and support faster feature delivery.
September 2025
5 Commits • 3 Features
Sep 1, 2025September 2025 — ehrbase/ehrbase: Focused on code quality, reliable AQL processing, and robust streaming/JSON handling to improve reliability, debugging, and maintainability. Delivered non-functional code cleanup, corrected AQL translation handling, and internal refactors that enable scalable streaming and more robust JSON insertions. These changes reduce maintenance costs, improve translation correctness, and support faster feature delivery.
August 2025
20 Commits • 5 Features
Aug 1, 2025Monthly summary for 2025-08: Delivered robust RM object handling in ehrbase/ehrbase with data aggregation improvements, RM reconstruction standardization, AQL enhancements for archetype local node predicates, CI/build/test infrastructure hardening, and V23 migration script refinements. These changes improve data integrity, performance, and developer productivity, enabling safer RM object loads, reproducible reconstructions, and faster feedback loops in CI.
20 Commits • 5 Features
Aug 1, 2025Monthly summary for 2025-08: Delivered robust RM object handling in ehrbase/ehrbase with data aggregation improvements, RM reconstruction standardization, AQL enhancements for archetype local node predicates, CI/build/test infrastructure hardening, and V23 migration script refinements. These changes improve data integrity, performance, and developer productivity, enabling safer RM object loads, reproducible reconstructions, and faster feedback loops in CI.
August 2025
July 2025
9 Commits • 1 Features
Jul 1, 2025July 2025 – ehrbase/ehrbase: Internal AQL engine refactor for maintainability and correctness across ASL, AqlSqlQueryBuilder, ConditionUtils, PathJoinConditionType, PathInfo, and COALESCE join condition, with no functional changes. Included stream handling cleanup and groundwork for PathJoinConditionType and COALESCE default values. Business impact: improved code quality, reduced risk of regressions, and a solid foundation for future performance improvements.
July 2025
9 Commits • 1 Features
Jul 1, 2025July 2025 – ehrbase/ehrbase: Internal AQL engine refactor for maintainability and correctness across ASL, AqlSqlQueryBuilder, ConditionUtils, PathJoinConditionType, PathInfo, and COALESCE join condition, with no functional changes. Included stream handling cleanup and groundwork for PathJoinConditionType and COALESCE default values. Business impact: improved code quality, reduced risk of regressions, and a solid foundation for future performance improvements.
June 2025
8 Commits • 1 Features
Jun 1, 2025June 2025 - ehrbase/ehrbase: Delivered targeted reliability and maintainability improvements across DB-to-RM conversion and AQL post-processing. Fixed a duplicate FEEDER_AUDIT handling issue during DB to RM conversion to prevent IllegalArgumentException and improved readability with formatting cleanups. Enhanced the AQL engine AslCleanupPostProcessor with extensive tests, a refactor for maintainability (UsedFields), inclusion of fields from subquery filters, and capacity improvements via LinkedHashMap utilities to stabilize query processing. These changes were implemented via a series of commits including the CDR-1937/Spotless fix and CDR-1982-related tests and cleanup, among others. Result: fewer runtime errors, smoother data ingestion, more reliable query processing, and a clearer, more maintainable codebase. Business impact: higher data integrity, faster issue resolution, and improved developer productivity.
8 Commits • 1 Features
Jun 1, 2025June 2025 - ehrbase/ehrbase: Delivered targeted reliability and maintainability improvements across DB-to-RM conversion and AQL post-processing. Fixed a duplicate FEEDER_AUDIT handling issue during DB to RM conversion to prevent IllegalArgumentException and improved readability with formatting cleanups. Enhanced the AQL engine AslCleanupPostProcessor with extensive tests, a refactor for maintainability (UsedFields), inclusion of fields from subquery filters, and capacity improvements via LinkedHashMap utilities to stabilize query processing. These changes were implemented via a series of commits including the CDR-1937/Spotless fix and CDR-1982-related tests and cleanup, among others. Result: fewer runtime errors, smoother data ingestion, more reliable query processing, and a clearer, more maintainable codebase. Business impact: higher data integrity, faster issue resolution, and improved developer productivity.
June 2025
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 monthly summary for ehrbase/ehrbase focusing on performance and data access improvements. Key features delivered include performance-oriented enhancements to the Contribution Data queries and a fix to ensure complete data retrieval from AuditDetails. Major bugs fixed include the AuditDetails query deficiency and CI/test reliability improvements tied to build configuration. Overall, these changes improve data access latency, reliability, and developer productivity, while strengthening the foundation for downstream analytics and auditing capabilities.
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 monthly summary for ehrbase/ehrbase focusing on performance and data access improvements. Key features delivered include performance-oriented enhancements to the Contribution Data queries and a fix to ensure complete data retrieval from AuditDetails. Major bugs fixed include the AuditDetails query deficiency and CI/test reliability improvements tied to build configuration. Overall, these changes improve data access latency, reliability, and developer productivity, while strengthening the foundation for downstream analytics and auditing capabilities.
April 2025
3 Commits
Apr 1, 2025April 2025 monthly summary for ehrbase/ehrbase focusing on stability improvements, bug fixes, and release readiness. Key outcomes include robust AQL temporal parameter handling and a maintenance SDK release to align dependencies, enabling safer queries and smoother release processes across the team.
3 Commits
Apr 1, 2025April 2025 monthly summary for ehrbase/ehrbase focusing on stability improvements, bug fixes, and release readiness. Key outcomes include robust AQL temporal parameter handling and a maintenance SDK release to align dependencies, enabling safer queries and smoother release processes across the team.
April 2025
March 2025
2 Commits
Mar 1, 2025March 2025 — Consolidated a critical RM_OBJECT aggregates bug fix in AqlSqlQueryBuilder, simplifying query construction and improving data accuracy. Removed path shortening for RM_OBJECT aggregates, switched SQL construction to use entity_idx and comp_data fields directly, refactored DbToRmFormat to return root path length, and eliminated baseEntityIndex usage in dataAggregation. These changes stabilize RM_OBJECT handling and streamline query paths, reducing maintenance overhead and potential errors in data retrieval.
March 2025
2 Commits
Mar 1, 2025March 2025 — Consolidated a critical RM_OBJECT aggregates bug fix in AqlSqlQueryBuilder, simplifying query construction and improving data accuracy. Removed path shortening for RM_OBJECT aggregates, switched SQL construction to use entity_idx and comp_data fields directly, refactored DbToRmFormat to return root path length, and eliminated baseEntityIndex usage in dataAggregation. These changes stabilize RM_OBJECT handling and streamline query paths, reducing maintenance overhead and potential errors in data retrieval.
February 2025
16 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for ehrbase/ehrbase focusing on key accomplishments in deterministic data processing, query handling, data integrity, and deployment stability. The work delivered improved reliability, predictability, and concurrency safety across EHR creation/validation, status indexing, migrations, and transaction handling.
16 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for ehrbase/ehrbase focusing on key accomplishments in deterministic data processing, query handling, data integrity, and deployment stability. The work delivered improved reliability, predictability, and concurrency safety across EHR creation/validation, status indexing, migrations, and transaction handling.
February 2025
January 2025
7 Commits • 2 Features
Jan 1, 2025January 2025 for ehrbase/ehrbase focused on correctness, maintainability, and SDK alignment to enable reliable data retrieval and smoother client integration. Deliverables span bug fixes in the AQL engine, a substantial refactor of the query translation layer, and an SDK update with terminology alignment.
January 2025
7 Commits • 2 Features
Jan 1, 2025January 2025 for ehrbase/ehrbase focused on correctness, maintainability, and SDK alignment to enable reliable data retrieval and smoother client integration. Deliverables span bug fixes in the AQL engine, a substantial refactor of the query translation layer, and an SDK update with terminology alignment.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for ehrbase/ehrbase. Focused on improving AQL query efficiency by removing the redundant EHR keyword and centralizing the optimization in the AqlQueryServiceImp. Key work included implementing optimizeQuery and adding comprehensive tests to verify reduced processing and improved query performance. No major bugs were reported this month; activity concentrated on delivering a robust optimization feature with strong test coverage, driving better performance for end users querying electronic health records and improving maintainability of the AQL path.
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for ehrbase/ehrbase. Focused on improving AQL query efficiency by removing the redundant EHR keyword and centralizing the optimization in the AqlQueryServiceImp. Key work included implementing optimizeQuery and adding comprehensive tests to verify reduced processing and improved query performance. No major bugs were reported this month; activity concentrated on delivering a robust optimization feature with strong test coverage, driving better performance for end users querying electronic health records and improving maintainability of the AQL path.
December 2024
November 2024
24 Commits • 12 Features
Nov 1, 2024November 2024 performance summary for ehrbase/ehrbase: Delivered a set of high-impact updates focusing on stability, performance, and maintainability. Key outcomes include upgrading the OpenEHR SDK to 2.20.0, a comprehensive overhaul of the CDR-1552 folder migration suite with test-data templates, cleanup, AQL path handling, and a simpler migration script; performance improvement by disabling AQL-on-folder by default. Resolved post-merge stability issues (CDR-1571) with corrective commits. Removed IntrospectService (CDR-1271) to reduce surface area and maintenance burden. Improved code quality and release readiness via Spotless formatting, SonarQube-driven improvements, and up-to-date release notes/changelog. Ongoing work on folder.items handling (CDR-1551) progressed toward a more robust JSON and AQL integration. These efforts collectively improve stability, performance, and maintainability while accelerating safe releases to production.
November 2024
24 Commits • 12 Features
Nov 1, 2024November 2024 performance summary for ehrbase/ehrbase: Delivered a set of high-impact updates focusing on stability, performance, and maintainability. Key outcomes include upgrading the OpenEHR SDK to 2.20.0, a comprehensive overhaul of the CDR-1552 folder migration suite with test-data templates, cleanup, AQL path handling, and a simpler migration script; performance improvement by disabling AQL-on-folder by default. Resolved post-merge stability issues (CDR-1571) with corrective commits. Removed IntrospectService (CDR-1271) to reduce surface area and maintenance burden. Improved code quality and release readiness via Spotless formatting, SonarQube-driven improvements, and up-to-date release notes/changelog. Ongoing work on folder.items handling (CDR-1551) progressed toward a more robust JSON and AQL integration. These efforts collectively improve stability, performance, and maintainability while accelerating safe releases to production.
October 2024
2 Commits • 1 Features
Oct 1, 2024Month: 2024-10 — Focused on enhancing AQL capabilities with virtual fields to improve query correctness and maintainability in ehrbase/ehrbase. Highlights include delivering Virtual Field support for AslFolderItemId in the AQL engine, refactoring and renaming the underlying field to AslFolderItemIdVirtualField, and updating the AQL builder to use the new structure. Commits implementing these changes: 6ea0c0a31f5ff9d61cee44dd01e6ae55017f580f (CDR-1551 review changes) and 89aef897617846a4092dbf31ea6c55ef6071dbcc (CDR-1551 renamed AslFolderItemIdValuesColumnField to AslFolderItemIdVirtualField). Overall impact: improved accuracy and maintainability of AQL queries involving AslFolderItemId, better alignment of data model with virtual semantics, and groundwork for future virtual-field features. Technologies/skills demonstrated: in-depth AQL engine work, refactoring for readability, field architecture changes, version-control discipline, and adherence to CDR-1551 ticketing.
2 Commits • 1 Features
Oct 1, 2024Month: 2024-10 — Focused on enhancing AQL capabilities with virtual fields to improve query correctness and maintainability in ehrbase/ehrbase. Highlights include delivering Virtual Field support for AslFolderItemId in the AQL engine, refactoring and renaming the underlying field to AslFolderItemIdVirtualField, and updating the AQL builder to use the new structure. Commits implementing these changes: 6ea0c0a31f5ff9d61cee44dd01e6ae55017f580f (CDR-1551 review changes) and 89aef897617846a4092dbf31ea6c55ef6071dbcc (CDR-1551 renamed AslFolderItemIdValuesColumnField to AslFolderItemIdVirtualField). Overall impact: improved accuracy and maintainability of AQL queries involving AslFolderItemId, better alignment of data model with virtual semantics, and groundwork for future virtual-field features. Technologies/skills demonstrated: in-depth AQL engine work, refactoring for readability, field architecture changes, version-control discipline, and adherence to CDR-1551 ticketing.
October 2024
May 2024
1 Commits • 1 Features
May 1, 2024May 2024 focused on delivering targeted performance and data-model improvements for ehrbase/ehrbase. The primary delivery was the AQL Query Engine Optimization and Data Model Enhancement, which simplifies data access by omitting unnecessary joins, adds a JSONB field to the AslStructureColumn enum, and streamlines AqlSqlQueryBuilder SQL generation. This work improves data retrieval efficiency and prepares the platform for larger-scale data access patterns.
May 2024
1 Commits • 1 Features
May 1, 2024May 2024 focused on delivering targeted performance and data-model improvements for ehrbase/ehrbase. The primary delivery was the AQL Query Engine Optimization and Data Model Enhancement, which simplifies data access by omitting unnecessary joins, adds a JSONB field to the AslStructureColumn enum, and streamlines AqlSqlQueryBuilder SQL generation. This work improves data retrieval efficiency and prepares the platform for larger-scale data access patterns.
Activity
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Quality Metrics
Correctness85.8%
Maintainability86.6%
Architecture82.2%
Performance78.8%
AI Usage21.2%
Skills & Technologies
Programming Languages
JavaMarkdownSQLYAML
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI developmentAQLAQL EngineBackend DevelopmentBuild AutomationBuild ConfigurationBuild ToolsCI/CDCachingCode CleanupCode FormattingCode Generation
Repositories Contributed To
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