Re: [HACKERS] pg_dump table order

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От Bruce Momjian
Тема Re: [HACKERS] pg_dump table order
Дата
Msg-id 199909131535.LAA17272@candle.pha.pa.us
обсуждение исходный текст
Ответ на Re: [HACKERS] pg_dump table order  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: [HACKERS] pg_dump table order
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> Better idea: make pg_dump smarter, so that it sorts the tables by name
> as far as possible without breaking inheritance and membership
> dependencies.  It already retrieves the inheritance graph, and it could
> certainly figure column-type dependencies too.  I don't think anyone
> would object to producing the output in a more meaningful order, so
> I see no need for a switch if you can make this work.
> 
> I used to know enough about topological sorts to sketch how this ought
> to work, but that was years ago :-(.  I do see that the simplest
> approach to a sort comparison function, "if a depends on b then say a>b,
> else say result of comparing name(a) and name(b)", will not work because
> it's not transitive.

I now someone fixed some of that recently, and I thought it was in 6.5.

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