Current status of LDB
LDB version 0.6 (released on 01/13/2004)
Changed the source files to work with SHORE 3.0 interim snapshot and gcc 3.2.
LDB version 0.5 (released on 7/10/2003)
- Fixed unions and the XML example.
- Made it work for RHL 9.0.
LDB version 0.4 (released on 4/14/2003)
- Added support for methods for the RPC interface.
- Fixed the error messages for the RPC interface.
- Added the executables oql_client/odl_client for oql/odl (through RPC).
- Created a complete example using Java (directory example/java).
- Fixed various bugs.
LDB version 0.3 (released on 3/31/2003)
- Now we support updates in the C++/Java bindings.
- dest += query and dest -= query don't work for collections of strings when the query is a constant string.
eg, e.degrees += "PhD" doesn't work. Use dest := dest+set(query) instead.
LDB version 0.2 (released on 2/21/2003)
To be done:
- Now LDB automatically enforces ODL relationships.
- Added Java and C++ interfaces based on remote procedure calls (RPCs).
See the Language Description.
Currently, it allows querying but not updating. Looks as ugly as ODBC/JDBC.
Changed VOODOO to work with the new RPCs. Added a new tcl script for ad-hoc OQL queries.
- LDB is still single-threaded/single-user. The problem is that, in the current Shore interim release,
POSIX thread cores don't work on Linux. I have to wait for a fix.
- Need to support updates in the C++/Java bindings.
- Unions (used by the XML example) need to be fixed.
LDB version 0.1 (released on 9/9/2002)
First release of LDB based on SHORE 2.0.
The major difference between the old Lambda-DB and the new LDB is that LDB uses the
SHORE 2.0 storage manager while Lambda-DB uses the higher-level SDL
layer of SHORE 1.1.1. The main reason for this major change is that the SHORE project does not support
SDL any more. To use the SHORE 2.0 storage manager, we had to write
our own VAS (Value-Added Server), which looks similar to that of SDL (directory
storage_manager). Like SHORE 2.0, LDB can hopefully be
ported to many different platforms, even though we have only test
it on Linux and Solaris. Currently, LDB is single-user (not client-server) and
does not automatically enforce ODL relationships (must be set by hand). These will be fixed in a
future release. Finally, the evaluation engine needs lots of fine-tuning.
Please look at Lambda-DB status for the status of the old lambda-DB releases.
Last modified: 01/12/04 by Leonidas Fegaras