Yes, I know of it. Krasimir's code uses similar functions and types in the three bindings (MySQL, ODBC, PostgreSql), but the bindings do not share a common interface (AFAICT). Because they are so similar, making them support a common interface shouldn't be a lot of work. I was hoping the earlier discussions on database interfaces would converge to a solution most interested parties agreed on. I'm still sold on the left-fold interface discussed previously. Oleg claims it is sufficient, as it can be automatically converted to a stream-like interface. I bit of me agrees with you that I should be consistent with previous work, and another bit says make it simple and elegant, and this leads me towards Oleg's proposals (left-fold + auto-generated value extraction functions + auto-generated stream functions). Do others on this list (and elsewhere) have any further opinions as to how a database interface ought to look?

-----Original Message----- From: Tim Docker [mailto:timd@macquarie.com.au] Sent: 29 September 2003 13:43 To: Bayley, Alistair; haskell-cafe@haskell.org Subject: RE: Database interface - would like advice on oracle library bind ing

Alistair Bayley wrote:

...

Still making slow progress on an Oracle database binding... now I'm trying to fit the API I have into some sort of abstract interface (like the one(s) discussed previously:

Since the previous dicussion I've discovered Krasimir Angelov's HSQL interface as part of his HTOOLKIT:

https://sourceforge.net/project/showfiles.php?group_id=65248

This has a uniform abstract interface similar to the one discussed, apparently implemented for MYSQL, ODBC, and PostgreSQL. I've only played with the MYSQL variant.

If possible, it would seem sensible to provide a consistent interface for your Oracle binding. If not, it may be worth persuading him to generalise the interface.

Then again, perhaps you knew about this already.

Tim

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