Big Data Analytics Group

Systems

• funqDB
  a database built around a purely functional data model and query language, aiming to replace SQL, relational algebra, and ORMs while avoiding pitfalls such as NULLs and SQL injection.
• Masterhorst
  the CS department's web-based application management system, used to handle applications to our master's programs.
• Python DBMS
  a relational DBMS implemented in Python, accompanied by Jupyter notebooks on storage layouts, indexing, sorting, query processing, and optimization; currently used internally in our Database Systems lecture and not yet publicly released.
• GenericVC
  a configurable version control framework that lets applications choose the versioning semantics they actually need (CIDR 2025).
• mutable
  a relational main-memory database system designed for rapid prototyping of research ideas while remaining competitive with state-of-the-art systems.

Apps

• Music Guide
  an interactive chord visualizer for exploring chords, their voicings, and their harmonic context.
• Sound Morphology
  an interactive tool for exploring the sound-morphological classification of musical instruments based on the work of Everard Sigal.

Papers

For many of our papers, accompanying software (code, datasets, reproducibility artifacts) is available. A selection of code repositories and source archives is listed below; for the full context (abstracts, BibTeX, etc.) please refer to our publications list. If something seems to be missing or broken, please get in touch with us — we are happy to help.

• mutable-ResultDB
  code accompanying Nix, Dittrich: Extending SQL to Return a Subdatabase (SIGMOD 2025).
• analysis-rmi
  code accompanying Maltry, Dittrich: A Critical Analysis of Recursive Model Indexes (PVLDB Vol. 15 / VLDB 2022).
• GENE
  code accompanying Dittrich, Nix, Schön: The next 50 Years in Database Indexing or: The Case for Automatically Generated Index Structures (PVLDB Vol. 15 / VLDB 2022).
• PDBF
  code accompanying Dittrich, Bender: Janiform Intra-Document Analytics for Reproducible Research (VLDB 2015 Demo).
• rewiring (source archive)
  code accompanying Schuhknecht, Dittrich, Sharma: RUMA has it: Rewired User-space Memory Access is Possible! (PVLDB / VLDB 2016).
• radix partitioning (source archive)
  code accompanying Schuhknecht, Khanchandani, Dittrich: On the Surprising Difficulty of Simple Things: the Case of Radix Partitioning (VLDB 2015).
• uncracked pieces (source archive)
  code accompanying Schuhknecht, Jindal, Dittrich: The Uncracked Pieces in Database Cracking (VLDB 2014 / PVLDB 2013, Best Paper Award).

Educational

• Big Data Engineering
  a collection of Jupyter notebooks accompanying our undergraduate lecture, covering relational data, SQL, transactions, indexing, query processing, and optimization.