Re: [HACKERS] create rule changes table to view ?
От | Peter Eisentraut |
---|---|
Тема | Re: [HACKERS] create rule changes table to view ? |
Дата | |
Msg-id | Pine.LNX.4.10.9909240005280.18581-100000@peter-e.yi.org обсуждение исходный текст |
Ответ на | Re: [HACKERS] create rule changes table to view ? (Bruce Momjian <maillist@candle.pha.pa.us>) |
Ответы |
Re: [HACKERS] create rule changes table to view ?
(wieck@debis.com (Jan Wieck))
Re: [HACKERS] create rule changes table to view ? (Bruce Momjian <maillist@candle.pha.pa.us>) |
Список | pgsql-hackers |
I have noticed and lived with this problem for quite a while. There's nothing in pg_class that tells a table from a view, they're both "relations". Since a view is implemented as in effect an empty table with on select rules on it, psql thinks every table with a rule on it is a view. This is just the output, nothing on the table changes. A fix would be to display both tables and views as "relation". As far as I know there is now 100% deterministic way to tell a table from a view. I think one fine day Jan is going to change that but for now we don't have to worry about it. Peter On Sep 23, Bruce Momjian mentioned: > Can someone comment on this? > > > I just began to learn rules with 6.5 and notice: > > test=> \dt > > Database = test > > +------------------+----------------------------------+----------+ > > | Owner | Relation | Type | > > +------------------+----------------------------------+----------+ > > | megera | access_log | table | > > | megera | hits | table | > > | megera | junk_qwerty | table | > > +------------------+----------------------------------+----------+ > > > > test=> create rule log_hits as on update to hits do instead insert into hits values ( NEW.msg_id, 1); > > CREATE > > test=> \dt > > Database = test > > +------------------+----------------------------------+----------+ > > | Owner | Relation | Type | > > +------------------+----------------------------------+----------+ > > | megera | access_log | table | > > | megera | hits | view? | > > | megera | junk_qwerty | table | > > +------------------+----------------------------------+----------+ > > > > Table hits now becomes view ? > > > > > > Regards, > > > > Oleg > > > > _____________________________________________________________ > > Oleg Bartunov, sci.researcher, hostmaster of AstroNet, > > Sternberg Astronomical Institute, Moscow University (Russia) > > Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/ > > phone: +007(095)939-16-83, +007(095)939-23-83 > > > > > > > > > -- Peter Eisentraut - peter_e@gmx.net http://yi.org/peter-e
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