Re: how to get a number of seconds in some interval ?

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Achilleas Mantzios <achill@xxxxxxxxxxxxxxxxxxxxx> writes:
> ΣÏ?ιÏ? Monday 12 May 2008 17:32:39 ο/η Julius Tuskenis έγÏ?αÏ?ε:
>> do you know why division of intervals was not implemented? As I see it - 
>> there should be an easy way to do so. '1 hour 30 minutes' / '1 hour' = 
>> 1.5 .... Seems straight forward...
>> 
> No idea why. However as you pose it,it makes sense.

No, it doesn't really, because intervals contain multiple components.
What would you define as the result of
	'1 month 1 hour' / '1 day'
bearing in mind that the number of days per month is not fixed, and
neither is the number of hours per day?

You can derive a number if you're willing to make arbitrary assumptions
about the relationships of the different units (as indeed extract(epoch)
does), but hard-wiring such assumptions into a basic arithmetic operator
doesn't seem like a good idea to me.

			regards, tom lane


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