Re: performQuery generics

From: Aristedes Maniatis (ar..sh.com.au)
Date: Sun Jan 13 2008 - 17:14:21 EST

  • Next message: Tore Halset: "Re: performQuery generics"

    On 14/01/2008, at 8:57 AM, Lachlan Deck wrote:

    > I don't think this works. i.e., I don't think it's up to the user to
    > determine the type returned for a data row fetch. That's a function
    > of the framework as far as I see it.
    >
    > How about this?
    > List<DataRow> dataRows = context.performRawQuery(query1)

    I agree... just to flesh out what Lachlan said: you might have a query
    which is constructed in one place (which also sets up the expression,
    etc) and then passes it to another bit of code to perform the query
    and deal with the results. It should not be predetermined what type of
    results are returned, but up to the code which performs the query to
    make that choice.

    Otherwise as Andrus' suggestion stands you have to make that choice at
    the time of constructing the query, making queries less reusable. The
    other benefit is that Select then always has the type of the class it
    is querying. This may prove useful in other places.

    Ari Maniatis

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