@hackage Takusen0.7

Takusen is a DBMS access library. It has a backend for Oracle on Unix, Linux or Windows via OCI, and a stub to test the library without any database. The infrastructure and the stub let one interface natively with other databases. The distinguished feature of Takusen is processing query results using a left-fold enumerator. The user supplies an iteratee function, which receives rows one-at-a-time from the result-set. The number of the arguments to the iteratee is the number of the columns in the result-set, plus the seed. Each column in the result-set has its own Haskell type. The latter could be a Maybe type if the particular iteratee wishes to process NULLs. The benefits are: more convenient and intuitive enumeration, iteration, and accumulation (see tests for examples); the retrieved data are not merely strings but have Haskell types: Int, Float, Date, etc.; buffer preallocation; pre-fetching; support for both enumerators and cursors, proper handling of all errors including various IO errors. No unsafe operations are used.