Re: Clever way to check overlapping time intervals ?

You can convert dates to cube, they have overlap operator &&






2011/9/16, Andreas Kretschmer <akretschmer@spamfence.net>:
> Andreas <maps.on@gmx.net> wrote:
>
>> Hi,
>> is there a clever way to check overlapping time intervals ?
>> An option named n should be taken from date y to y.
>> The same name is ok for another interval.
>>
>> e.g. table :  mytab ( d1 date, d2 date, n text, v text )
>>
>> There should be a constraint to provide no row can have a d1 or d2
>> within the interval of another row in case they have the same n.
>>
>> And no row can have an interval that encloses an existing interval.
>
> You can use the PERIOD data type:
> http://temporal.projects.postgresql.org/reference.html
>
> and the new (since 9.0) exclusion constraint:
> http://www.depesz.com/index.php/2010/01/03/waiting-for-8-5-exclusion-constraints/
> http://www.google.de/search?hl=de&q=postgresql+exclusion+constraint&aq=0L&aqi=g-L1&aql=&oq=postgresql+exclusion+
> http://thoughts.j-davis.com/2010/03/09/temporal-postgresql-roadmap/
>
>
>
>
> Andreas
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pasman