H-PRIMA
From Schema Evolution
Overview
H-PRIMA is an efficient incarnation of PRIMA, which supports the same features of management and querying of transaction-database systems under schema evolution. PRIMA was based on XML DB that executes XQuery queries on XML data, which is not very efficient at the current state of art. In H-PRIMA, we instead employ RDBMS-based query execution engine, to improve the performance. We also address the problem of temporal coalesce for the broken history at schema changes.
Data Set
- Employee Data Set Generator: coming soon
- XML data (Warning: simple left-click on these files could take forever - download them with right-click.)
- emp1h-vdoc.xml (0.9MB): data for 1,000 employees over evolving schema of five year periods. generated from H-Tables for the purpose of performance comparison between XML DB and RDBMS.
- emp10h-vdoc.xml (8.9MB): same data with 10,000 employees
- emp100h-vdoc.xml (89.2MB): same data with 100,000 employees