This wiki reports the research advances of the Panta Rhei, a research project for data management under schema evolution.
The Panta Rhei project aims at providing powerful tools that: (i) facilitate schema evolution and guide the Database Administrator in planning and evaluating changes, (ii) support automatic rewriting of legacy queries against the current schema version, (iii) enable efficient archiving of the histories of data and metadata, and (iv) support complex temporal queries over such histories, and (v) automate the documentation and querying of metadata histories.
- Carlo A. Curino 
- Politecnico di Milano
- Letizia Tanca 
- Fabrizio Moroni
- UC San Diego
- Alin Deutsch 
- Chien-Yi Hou
Within this macro-project the following projects have been developed (please follow the links for further details):
- The Pantha Rei Schema Evolution Benchmark <bibref f="defbib.bib">iceis2008</bibref>, a benchmark for schema evolution developed from the actual evolution of the MediaWiki DB backend.
- The History Metadata Manager <bibref f="defbib.bib">ecdm2008</bibref>, a tool to support temporal queries over metadata histories, and its Semantic Web Extension the Semantic HMM <bibref f="defbib.bib">stsm2008</bibref>
- The prototype system PRISM: tool for Graceful Schema Evolution <bibref f="defbib.bib">vldb2008a</bibref>, <bibref f="defbib.bib">curinovldb2011update</bibref>, and its demo Prism demo page <bibref f="defbib.bib">icde2009demo</bibref>
- The prototype system PRIMA: a system for querying Transaction-Time DB under evolving schema <bibref f="defbib.bib">Vldb2008b</bibref> and its demo<bibref f="defbib.bib">moon09sigmoddemo</bibref>.
- The extension of PRIMA named Scalable Architecture and Query Optimization for Transaction-time DBs with Evolving Schemas <bibref f="defbib.bib">Sigmod2010</bibref>.
This work was supported in part by NSF-IIS award 0705345: “III-COR: Collaborative Research: Graceful Evolution and Historical Queries in Information Systems – A Uniﬁed Approach"