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Re: Another question about Range types

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Regarding npgsql, range types have no direct mapping so they will be treated like strings. Sorry for that.

I'll work to add support to it. Would you mind to fill a feature request about that on our feature requests project page? http://project.npgsql.org

Thanks in advance.

Em 03/08/2012 17:01, "Mike Christensen" <mike@xxxxxxxxxxxxx> escreveu:
There's another ongoing thread about range types, which was great
because I wasn't familiar with the feature (guess it's new in 9.2?).

I run a recipe website and was looking for *exactly* this sort of
feature a few weeks ago when I was adding in support for ranges of
ingredients (such as "1-2tsp salt").  In the end, I implemented it
using two columns (QtyHigh and QtyLow).  In the salt example, QtyHigh
would be 2 and QtyLow would be 1.  I also have some CHECK constraints
to make sure high is always higher, and they're not the same, and not
negative or anything.

Now, for 99% of the ingredients, QtyHigh would have a value and QtyLow
would just be null.  For example, "2tsp salt" would have a QtyHigh of
2 and a QtyLow of null, which would indicate there is no range.

I'm curious if I could combine these columns into one using a RANGE
type.  Obviously, if the column only stored ranges, it would be easy.
However, can a range also be one-dimensional?  Can I have a High value
and no low value?  Or would the recommended design be to have high/low
be the same?  Overall, would this scenario be an appropriate use case
for this RANGE type, since only some of the data are ranges?

BONUS Question:

How are RANGE types represented in Npgsql, or are they even supported yet?

Mike

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