knowledgegarden/java-unidu-pire

Pire, Distributed Datalog, HySpirit, DDatalog

java-unidu-spire

Spire, Distributed Datalog, HySpirit

This is a clone of the Pire project with

• Upgrade patches to JDK 1.8
• Conversion (incomplete) to a Maven project

It is based on the very last distribution; it is known that the project ended at the tragic death of its developer Dipl.-Inform. Henrik Nottelmann

Permission to continue with the project was granted by Prof. Dr.-Ing. Norbert Fuhr

Some publications are listed here

Comments

• Maven is incomplete because some dependencies are not available in Maven. Those dependencies are in the /lib directory; they must be added to the classpath (both in an IDE such as Eclipse, and in shell scripts)
• A sample shellscript pdlExample.sh is included to illustrate how to bring it up
• Mavenizing provoked a few classpath issues which - as a hack - were resolved in the file de.unidu.is.util.SystemUtilities
• A missing file common_words was added to /conf

java-unidu-pire's Issues

The class DB must implement an Interface

Right now, DB is hardwired for specific kinds of databases; those which accept DOUBLE as a datatype; PostgreSql does not accept that.

We need to, instead, code for an IDatabase, for which DB is an implementation.
This would allow to write an implementation which can adapt SQL query strings to different providers; for instance, for Postgres, one does a replaceAll on double to integer on all create statements.

Without testing this, I have no clue what the side effects will be, but for now, booting a DB against postgress fails on the first table create which then cascades collapse.