Re: [SQL] line datatype
От | Bruce Momjian |
---|---|
Тема | Re: [SQL] line datatype |
Дата | |
Msg-id | 200207161538.g6GFcS925954@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: [SQL] line datatype (Thomas Lockhart <lockhart@fourpalms.org>) |
Список | pgsql-hackers |
Thomas Lockhart wrote: > ... > > > We do need a solution for exact dump/reload of floating-point data, > > > but I don't see why the lack of it should be reason to disable access > > > to the LINE type. > > I don't understand why dumping the two point values isn't sufficient. > > Which two point values? LINE is handled as an equation, not as points, > unlike the LSEG type which has two points. Well, the \dT documentation used to show line as two points, so I assumed that was how it was specified. > One possibility is to have the external representation *be* the same as > LSEG, then convert internally. Then we need to decide how to scale those > points; maybe always using a unit vector is the right thing to do... No one likes entering an equation. Two points seems the simplest. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania19026
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