Re: A minor error in "5.8 Inheritance"
От
Tom Lane
Тема
Re: A minor error in "5.8 Inheritance"
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Msg-id
26473.1164676221@sss.pgh.pa.us
Ответ на
A minor error in "5.8 Inheritance" (Taiki Yamaguchi)
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A minor error in "5.8 Inheritance" Taiki Yamaguchi <yamaguti@sra.co.jp>
Re: A minor error in "5.8 Inheritance" Tom Lane <tgl@sss.pgh.pa.us>
Taiki Yamaguchi writes: > I found a small error in "5.8 Inheritance" where it says: > Check constraints can be defined on tables within an inheritance > hierarchy. All check constraints on a parent table are automatically > inherited by all of its children. Other types of constraints are not > inherited, however. > However, "not null" constraints also will be inherited. Unique > constraints, primary key and foreign keys are not. I think whoever wrote that had in mind that not-null constraints are a special case of check constraints. I agree it's clearer to spell it out though. Done, thanks for the report. regards, tom lane
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