Hi
Bjorn Bringert wrote:
Mads: Preparing the statement and asking the DB about the type at
compile is a great idea! I've never thought of that. Please consider
completing this and packaging it as a library.
Thanks for the nice remark. And I will begin completing the idea, as
soon I have
Hi Mads,
Not only pictures, but also code can say more than a thousands words.
Therefore, I have been implementing a proof of concept. The code is
attached in two files.
Nice! I have to admit, it's much nicer than I expected it to be. Just
out of curiousity, what happens when you write:
Hi Wouter,
Wouter Swierstra wrote:
Nice! I have to admit, it's much nicer than I expected it to be. Just
out of curiousity, what happens when you write:
selectTupleList :: Connection - IO [Integer]
instead of
selectTupleList :: Connection - IO [(Integer, String, String)]
What
Hi Wouter
Wouter Swierstra wrote:
Here's a concrete example. Suppose you have a query q that, when
performed, will return a table storing integers. I can see how you can
ask the SQL server for the type of the query, parse the response, and
compute the Haskell type [Int]. I'm not sure
Hello Mads,
Thursday, May 8, 2008, 1:24:05 AM, you wrote:
also because TH is difficult. At least TH was difficult for me. It might
just be because I have never worked with anything like TH before (have
no, TH is dificult by itself. if you have spare time - read about
metalua, which implements
Hi Mads,
I think there may a bit of problem with the approach you suggest: as
the type returned by the query is computed by the SQL server (if I
understand you correctly), it's very hard to do anything with the
result of the query - the Haskell compiler has no idea what type the
result has, so
Hi Mads,
I was wondering if anybody had experimented with using Template
Haskell
(TH) and ordinary SQL to make type-safe database access?
I know HaskellDB, for example, does something quite similar. There's a
preprocessor that generates a Haskell file with a Haskell
representation of
Hi,
Wouter Swierstra wrote:
Hi Mads,
I was wondering if anybody had experimented with using Template
Haskell
(TH) and ordinary SQL to make type-safe database access?
I know HaskellDB, for example, does something quite similar. There's a
preprocessor that generates a Haskell file
Hi,
I was wondering if anybody had experimented with using Template Haskell
(TH) and ordinary SQL to make type-safe database access?
To clarify what I am thinking about I will sketch how it could be done.
The TH function should take two inputs. SQL (as a string) and a database
source name
