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Re: Value: why not float support? [message #30387 is a reply to message #30363]

Mon, 27 December 2010 13:20

mirek is currently offline

mirek
Messages: 14267
Registered: November 2005

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kohait00 wrote on Sun, 26 December 2010 05:28

concerning double and float in databases: i'm sure the major db's *dont* simply convert it internally. at least not in terms of storage (millions and millions of rows with wasted 4 bytes for double, where float had been enough cant be aforded). thats why one generally is to think of a good, well fitting model/schema for one's problem, not to waste space and performance when handling the data.

No, that was not what I wanted to say. Of course, if you use 4B float in the DB schema, it gets stored as 4B value (unless you are using Oracle, which has very specific way of dealing with numbers anyway).

BUT all these floats can be moved at interface level to DB as doubles.

Which is sort of similar to what I recommend w.r.t. float in C++ code - only use it for storage...

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[Message index]

		Value: why not float support? By: kohait00 on Mon, 30 August 2010 10:54
		Re: Value: why not float support? By: mirek on Tue, 31 August 2010 15:49
		Re: Value: why not float support? By: kohait00 on Tue, 31 August 2010 16:11
		Re: Value: why not float support? By: mirek on Tue, 31 August 2010 18:49
		Re: Value: why not float support? By: kohait00 on Tue, 31 August 2010 22:02
		Re: Value: why not float support? By: gprentice on Wed, 01 September 2010 13:52
		Re: Value: why not float support? By: kohait00 on Wed, 01 September 2010 16:13
		Re: Value: why not float support? By: mirek on Thu, 02 September 2010 09:40
		Re: Value: why not float support? By: kohait00 on Thu, 02 September 2010 11:24
		Re: Value: why not float support? By: mirek on Mon, 06 September 2010 10:40
		Re: Value: why not float support? By: kohait00 on Mon, 06 September 2010 11:54
		Re: Value: why not float support? By: kohait00 on Mon, 13 December 2010 15:47
		Re: Value: why not float support? By: mirek on Wed, 15 December 2010 16:15
		Re: Value: why not float support? By: kohait00 on Wed, 15 December 2010 16:41
		Re: Value: why not float support? By: rylek on Mon, 20 December 2010 23:08
		Re: Value: why not float support? By: kohait00 on Tue, 21 December 2010 08:20
		Re: Value: why not float support? By: mirek on Fri, 24 December 2010 12:39
		Re: Value: why not float support? By: kohait00 on Fri, 24 December 2010 13:55
		Re: Value: why not float support? By: mirek on Sat, 25 December 2010 10:48
		Re: Value: why not float support? By: kohait00 on Sun, 26 December 2010 11:28
		Re: Value: why not float support? By: mirek on Mon, 27 December 2010 13:20
		Re: Value: why not float support? By: kohait00 on Mon, 27 December 2010 14:28
		Re: Value: why not float support? By: mirek on Mon, 27 December 2010 14:44
		Re: Value: why not float support? By: kohait00 on Tue, 28 December 2010 13:47
		Re: Value: why not float support? By: kohait00 on Mon, 07 March 2011 14:31
		Re: Value: why not float support? By: mirek on Mon, 07 March 2011 23:04
		Re: Value: why not float support? By: kohait00 on Tue, 08 March 2011 08:33

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