Re: Bug #477: path ?# path

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От Bruce Momjian
Тема Re: Bug #477: path ?# path
Дата
Msg-id 200110130121.f9D1L3q18529@candle.pha.pa.us
обсуждение исходный текст
Ответ на Bug #477: path ?# path  (pgsql-bugs@postgresql.org)
Список pgsql-bugs
Can someone comment on this?

> Curtis Barrett (curtis@northwestern.edu) reports a bug with a severity of 3
> The lower the number the more severe it is.
>
> Short Description
> path ?# path
>
> Long Description
> nothing major. the ?# (geometric intersection) operator for paths iterates over point pairs in each path testing for
intersection.however, it ignores the last->first point pair for closed paths. a quick workaround is to tack the first
pointon the end of a closed path. 
>
> Sample Code
> # select '((1,1),(2,0))'::path ?# '((0,0),(0,2),(2,2))'::path;
>  ?column?
> ----------
>  f
> (1 row)
>
> # select '((1,1),(2,0))'::path ?# '((0,0),(0,2),(2,2),(0,0))'::path;
>  ?column?
> ----------
>  t
> (1 row)
>
>
> No file was uploaded with this report
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

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