apache/impala
Oct 2024 – Oct 2025
13 Months active
Languages Used
C++JavaPythonSQLThriftShellBashCMake
Technical Skills
Backend DevelopmentDatabaseDebuggingDistributed SystemsPerformance OptimizationPython
Riza Suminto
PROFILE
Riza Suminto
Riza Suminto contributed to the apache/impala repository by engineering robust backend features and stability improvements across distributed query planning, catalog management, and test infrastructure. He implemented parallelized table loading and enhanced cardinality estimation, optimizing query performance and reducing latency in local catalog mode. Using C++, Java, and Python, Riza refactored core components for concurrency control, improved protocol compatibility, and automated test reliability, addressing deadlocks and race conditions. His work included integrating new data types for Kudu, strengthening Iceberg support, and modernizing build systems. These efforts collectively improved system reliability, developer velocity, and maintainability, demonstrating deep technical understanding and cross-stack proficiency.
Overall Statistics
Feature vs Bugs
57%Features
Repository Contributions
139Total
Bugs
31
Commits
139
Features
41
Lines of code
65,077
Activity Months13
Your Network
121 people
Work History
October 2025
4 Commits • 3 Features
Oct 1, 2025October 2025 (2025-10) monthly summary focusing on business value, reliability, and maintainability for apache/impala. Key outcomes include delivering Kudu array column support in the Impala toolchain, stabilizing TSAN builds via a KuduClient workaround, clarifying Iceberg orphan file behavior with new documentation, and improving build traceability by logging Maven dependencies during frontend builds. Collectively, these efforts expand data type capabilities, reduce CI/build flakiness, improve user guidance, and enhance debugging efficiency.
4 Commits • 3 Features
Oct 1, 2025October 2025 (2025-10) monthly summary focusing on business value, reliability, and maintainability for apache/impala. Key outcomes include delivering Kudu array column support in the Impala toolchain, stabilizing TSAN builds via a KuduClient workaround, clarifying Iceberg orphan file behavior with new documentation, and improving build traceability by logging Maven dependencies during frontend builds. Collectively, these efforts expand data type capabilities, reduce CI/build flakiness, improve user guidance, and enhance debugging efficiency.
October 2025
September 2025
6 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for apache/impala: delivered stability and performance improvements in catalog/local catalog workflows, added parallel loading to reduce latency, and fixed critical defects affecting reliability and test stability. These changes reduce latency in common paths, improve throughput in local catalog mode, ensure compatibility with workload management and V2 profiles, and strengthen CI/QA with deflakes and regression fixes.
September 2025
6 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for apache/impala: delivered stability and performance improvements in catalog/local catalog workflows, added parallel loading to reduce latency, and fixed critical defects affecting reliability and test stability. These changes reduce latency in common paths, improve throughput in local catalog mode, ensure compatibility with workload management and V2 profiles, and strengthen CI/QA with deflakes and regression fixes.
August 2025
9 Commits • 2 Features
Aug 1, 2025In August 2025, delivered targeted enhancements and stability improvements for Apache Impala that drive better performance predictability, compatibility, and developer velocity across large clusters. Key outcomes include tuning capabilities for the distributed planner to optimize broadcast joins, aligning data-loading and workload execution with the HS2 protocol for future-proofing and testing efficiency, and a consolidated suite of test/build reliability fixes that reduce flaky behavior and accelerate release cycles. These efforts collectively enhance query performance control, simplify upgrades, and strengthen the reliability of CI/test pipelines while showcasing robust cross-cutting engineering skills.
9 Commits • 2 Features
Aug 1, 2025In August 2025, delivered targeted enhancements and stability improvements for Apache Impala that drive better performance predictability, compatibility, and developer velocity across large clusters. Key outcomes include tuning capabilities for the distributed planner to optimize broadcast joins, aligning data-loading and workload execution with the HS2 protocol for future-proofing and testing efficiency, and a consolidated suite of test/build reliability fixes that reduce flaky behavior and accelerate release cycles. These efforts collectively enhance query performance control, simplify upgrades, and strengthen the reliability of CI/test pipelines while showcasing robust cross-cutting engineering skills.
August 2025
July 2025
5 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for apache/impala: Delivered targeted reliability and stability improvements across critical subsystems, translating development work into measurable business value. Focused on stabilizing test and build environments, enhancing logging observability, and hardening high-availability (HA) behavior during failovers. Results include fewer flaky tests, deterministic build/test configurations, improved logging for AdmissionD, and robust catalog metadata handling that reduces downtime during transitions.
July 2025
5 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for apache/impala: Delivered targeted reliability and stability improvements across critical subsystems, translating development work into measurable business value. Focused on stabilizing test and build environments, enhancing logging observability, and hardening high-availability (HA) behavior during failovers. Results include fewer flaky tests, deterministic build/test configurations, improved logging for AdmissionD, and robust catalog metadata handling that reduces downtime during transitions.
June 2025
11 Commits • 6 Features
Jun 1, 2025June 2025 highlights across the apache/impala project. Delivered reliability and performance improvements across Iceberg integration, startup workflows, and cache coherence, complemented by CI/test stabilization and build hygiene. Key outcomes include faster, more reliable startup; improved cache behavior on partition changes; clearer operational visibility through logging enhancements; and preparatory steps for Java toolchain upgrades. These changes support production reliability, developer velocity, and upgrade readiness.
11 Commits • 6 Features
Jun 1, 2025June 2025 highlights across the apache/impala project. Delivered reliability and performance improvements across Iceberg integration, startup workflows, and cache coherence, complemented by CI/test stabilization and build hygiene. Key outcomes include faster, more reliable startup; improved cache behavior on partition changes; clearer operational visibility through logging enhancements; and preparatory steps for Java toolchain upgrades. These changes support production reliability, developer velocity, and upgrade readiness.
June 2025
May 2025
21 Commits • 8 Features
May 1, 2025May 2025 (apache/impala) focused on stabilizing the CI/test environment, delivering HS2 integration improvements, and elevating code quality, with direct business value in reliability and faster release cycles. Efforts spanned test stabilization, HS2 state handling, configuration cleanup, and test suite maintenance, enabling more predictable deployments and quicker feedback loops for developers and operators.
May 2025
21 Commits • 8 Features
May 1, 2025May 2025 (apache/impala) focused on stabilizing the CI/test environment, delivering HS2 integration improvements, and elevating code quality, with direct business value in reliability and faster release cycles. Efforts spanned test stabilization, HS2 state handling, configuration cleanup, and test suite maintenance, enabling more predictable deployments and quicker feedback loops for developers and operators.
April 2025
15 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/impala focusing on delivering stability, correctness, and developer productivity improvements that drive business value. Key work centered on test reliability, query planning/scheduling correctness, shell UX, and build/infra robustness. The initiatives reduced test flakiness, improved CI signal quality, tightened protocol consistency, and enhanced developer experience with clearer reporting and safer initialization checks.
15 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for apache/impala focusing on delivering stability, correctness, and developer productivity improvements that drive business value. Key work centered on test reliability, query planning/scheduling correctness, shell UX, and build/infra robustness. The initiatives reduced test flakiness, improved CI signal quality, tightened protocol consistency, and enhanced developer experience with clearer reporting and safer initialization checks.
April 2025
March 2025
24 Commits • 9 Features
Mar 1, 2025March 2025 focused on stabilizing CI, hardening test infrastructure, and delivering core cleanups to improve reliability and adoption of HS2. Delivered execution summaries for ImpylaHS2, in-place CatalogD reset, and standardized workloads tests; fixed critical DCHECK and Kudu txn issues; major refactors to remove protocol-specific states and beeswax dependencies; enhanced logging; and improved test stability across multiple areas, enabling faster feedback to product teams.
March 2025
24 Commits • 9 Features
Mar 1, 2025March 2025 focused on stabilizing CI, hardening test infrastructure, and delivering core cleanups to improve reliability and adoption of HS2. Delivered execution summaries for ImpylaHS2, in-place CatalogD reset, and standardized workloads tests; fixed critical DCHECK and Kudu txn issues; major refactors to remove protocol-specific states and beeswax dependencies; enhanced logging; and improved test stability across multiple areas, enabling faster feedback to product teams.
February 2025
8 Commits
Feb 1, 2025February 2025: Delivered key fixes to Impala core query handling and significantly strengthened test infrastructure to boost reliability and determinism. Reconciled Hive label rewriting behavior, stabilized default query option restoration, and implemented test isolation and resource improvements to reduce flakiness across environments. These changes enhance cross-version compatibility, reduce release risk, and improve developer velocity.
8 Commits
Feb 1, 2025February 2025: Delivered key fixes to Impala core query handling and significantly strengthened test infrastructure to boost reliability and determinism. Reconciled Hive label rewriting behavior, stabilized default query option restoration, and implemented test isolation and resource improvements to reduce flakiness across environments. These changes enhance cross-version compatibility, reduce release risk, and improve developer velocity.
February 2025
January 2025
17 Commits • 3 Features
Jan 1, 2025Concise monthly summary for 2025-01 focusing on development activity in apache/impala. The period delivered notable feature toggles for aggregation analysis, refined cost modeling for pre-aggregation, and notable infrastructure improvements, while fixing a critical clock-skew bug in distributed execution. Results include more accurate query plans, tunable aggregation behavior for workloads, and improved test reliability across CI.
January 2025
17 Commits • 3 Features
Jan 1, 2025Concise monthly summary for 2025-01 focusing on development activity in apache/impala. The period delivered notable feature toggles for aggregation analysis, refined cost modeling for pre-aggregation, and notable infrastructure improvements, while fixing a critical clock-skew bug in distributed execution. Results include more accurate query plans, tunable aggregation behavior for workloads, and improved test reliability across CI.
December 2024
5 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for apache/impala focused on delivering spec-aligned schema changes, strengthened tooling/observability, and robust test coverage, with a critical fix to cardinality handling that improves query planning stability. Delivered concrete business value through schema alignment with TPC-DS v2.11.0, increased test reliability and coverage, and enhanced WebUI visibility and maintainability of tooling components.
5 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for apache/impala focused on delivering spec-aligned schema changes, strengthened tooling/observability, and robust test coverage, with a critical fix to cardinality handling that improves query planning stability. Delivered concrete business value through schema alignment with TPC-DS v2.11.0, increased test reliability and coverage, and enhanced WebUI visibility and maintainability of tooling components.
December 2024
November 2024
11 Commits • 2 Features
Nov 1, 2024In 2024-11, the Impala effort focused on strengthening query planning accuracy, data scan correctness, and developer tooling, delivering measurable business value through more reliable plan choices and faster debugging.
November 2024
11 Commits • 2 Features
Nov 1, 2024In 2024-11, the Impala effort focused on strengthening query planning accuracy, data scan correctness, and developer tooling, delivering measurable business value through more reliable plan choices and faster debugging.
October 2024
3 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on apache/impala. Delivered targeted improvements across the distributed planner, CTAS observability, and test infrastructure, delivering measurable business value through more accurate cost-based planning, better monitoring/admission control, and more reliable CI tests.
3 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 focusing on apache/impala. Delivered targeted improvements across the distributed planner, CTAS observability, and test infrastructure, delivering measurable business value through more accurate cost-based planning, better monitoring/admission control, and more reliable CI tests.
October 2024
Activity
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Quality Metrics
Correctness92.4%
Maintainability88.2%
Architecture85.2%
Performance79.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
BashC++CMakeJavaPythonSQLShellThrift
Technical Skills
API DevelopmentAPI IntegrationBackend DevelopmentBug FixingBuild AutomationBuild EngineeringBuild ScriptingBuild SystemBuild System ConfigurationBuild SystemsC++C++ DevelopmentCI/CDCI/CD OptimizationCI/CD integration
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