We present an improved version of the HaskellDB database library. The
original version relied on TRex, a Haskell extension supported only by
the Hugs interpreter. We have replaced the use of TRex by a record
implementation which uses more commonly implemented Haskell
extensions.
  
Additionally, HaskellDB now supports two different cross-platform
database backends. Other changes include database creation
functionality, bounded string support, performance enhancements, fixes
to the optimisation logic, transaction support and more fine grained
expression types.