Hello!
I'm particularly interested in getting non-relational databases working well with Haskell, particularly ones with distributed queries/processing such as MapReduce. My first goal is to fix up a better interface to MongoDB's MapReduce for applications using Persistent.
My general interests are SQL-alternatives and distributed computing.
However I'll be swamped for the next two months, so I'm not expecting any progress any time soon.
Drew Haven
drew.haven@gmail.com
On Mon, May 7, 2012 at 7:10 AM, Torsten Grust
<torsten.grust@gmail.com> wrote:
Hi all,
just wanted to say `hi'. We are the folks working on
Database-Supported Haskell (DSH on hackag e [1]), a library
which allows you to continue to use the famililar list-processing
combinators -- or list comprehensions, for that matter --
when formulating database queries.[2]
Such expressions are compiled into a (small) group of cooperating
SQL statements which effectively evaluate the expression over the
tables of an associated relational DBMS (these tables are thus
looked at as if they were lists of tuples).
We are always interested in growing the set of functions that
DSH understand as ``database-able''. Further work is underway
to support arbitrary non-recursive algebraic datatypes in such
queries (based on GHC's generic deriving mechanism).
We're thus living on the ``don't embed literal SQL text into
your Haskell source at all'' end of the spectrum, somewhat distant
from postgresql-simple and friends, I guess. Still, we're quite
interested where these other efforts go.
Cheers,
--Torsten
[1] http://hackage.haskell.org/package/DSH
[2] http://db.inf.uni-tuebingen.de/research/dsh
On 7 May 2012, at 15:56, Greg Weber wrote:
I worked with a student to lay out a vision for type-safe database
access in a GSoC proposal [1].
I have little interest in the SQL variant at the moment, but plan on
making a MongoDB version when I get a free weekend, which may not be
until after I am done mentoring GSoC projects.
[1] http://www.google-melange.com/gsoc/proposal/review/google/gsoc2012/zhulikas/1
On Mon, May 7, 2012 at 3:03 AM, Leon Smith <leon.p.smith@gmail.com> wrote:
I thought I should break the ice here; we currently have 22 subscribers,
with names I recognize from acid-state, mysql-simple, postgresql-simple,
hssqlppp, persistent, and even PostgreSQL itself. If I've missed
anything relevant here, please speak up.
So the goal of this list is to help improve the state of database
programming in Haskell; I'm not picky about particular topics as long as
they are of reasonable quality and relevant to database programming and
Haskell. This could be implementing a database in Haskell itself (like
acid-state), to interacting with traditional RDBMSes or newer NoSQL
systems.
My personal interest at the moment primarily lies at coming up with a good
mid-level interface to RDBMSes along the lines of the -simple libraries,
but I also have interest in an auto-pipelining client library for
PostgreSQL, which involves some very low-level details of the PostgreSQL
frontend/backend protocol. I'm also interested in higher-level
abstractions for dealing with relational databases in general, but I really
don't have well-formed opinions on how this should be done.
Also while SQL can be cool, it hides that coolness under a lot of syntactic
(and some semantic) ugliness; I often wish for a simpler, saner syntax,
replacing NULL with algebraic data types, and a richer attribute types,
especially relationally valued attributes.
So what you interested in?
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| Prof. Dr. Torsten Grust
| Database Systems — Universität Tübingen (Germany)
| torsten.grust@uni-tuebingen.de
| db.inf.uni-tuebingen.de