[Haskell-cafe] HDBC PostgreSQL

[Patrick Brannan]

That did the trick. Everything works perfectly now. Thank you.

On Sat, Oct 10, 2009 at 8:04 AM, Duncan Coutts
<duncan.coutts at googlemail.com> wrote:
> On Fri, 2009-10-09 at 14:56 -0500, Patrick Brannan wrote:
>> Hello,
>>
>> I'm getting back into Haskell after an absence of a few years. I'm in
>> the process of trying to connect to postgresql with hdbc-postgresql on
>> a Windows XP box.
>>
>> Seemingly, things installed without  a problem, but at the command
>> prompt I get the following:
>>
>> Prelude> :module Database.HDBC Database.HDBC.PostgreSQL
>> module `Database.HDBC.PostgreSQL' is not loaded
>>
>> If I run ghci this way with package options here's what I get:
>>
>> C:\work\haskell\HDBC-postgresql-2.1.0.0>ghci -package HDBC -package
>> HDBC-postgresql
>
>
> You are running it from within the source tree of the package itself.
> Local sources take precedence over ones from packages. So you load the
> -package HDBC-postgresql, but when you ask GHCi for :module
> Database.HDBC.PostgreSQL it is looking at the local file
> Database/HDBC/PostgreSQL.hs, and you cannot switch context to a module
> that isn't yet loaded, hence the error.
>
> If what you want is to load the package, then start in a different
> directory so the local sources do not get in the way. If what you want
> is to load the local sources then use :load (:l) rather than :module
> (:m). The :load command loads local source files. The :module switches
> context between loaded modules (modules from packages are already
> loaded).
>
> Duncan
>
>