On Sat, Jul 23, 2016 at 12:01 AM, David Fetter <da...@fetter.org> wrote:
> On Fri, Jul 22, 2016 at 01:15:17PM +0200, Anton Dignös wrote:
>> Hi hackers,
>> we are a group of researches that work on temporal databases. Our
>> main focus is the processing of data with time intervals, such as
>> the range types in PostgreSQL.
> Thanks for your hard work so far!
> [Explanation and examples elided]
> To what extent, if any, are you attempting to follow the SQL:2011
The querying in the SQL:2011 standard is based on simple SQL range restrictions
and period predicates (OVERLAP, PRECEDES, FOR SYSTEM_TIME AS OF, etc) that
functionality-wise in PostgreSQL are already covered by the operators and
functions on range types.
Operations such as aggregation, outer joins, set-operations on ranges
Section 2.5 "Future directions" in the above paper) are not yet part of the
standard. These are the operations that require the adjustment (or splitting) of
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