Lists: | pgsql-general |
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From: | "Webb Sprague" <webb(dot)sprague(at)gmail(dot)com> |
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To: | |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Inheritance fixing timeline? (Was "Inherited FK Indexing") |
Date: | 2007-09-30 23:28:43 |
Message-ID: | b11ea23c0709301628g186316aaw6797dcfa47abda79@mail.gmail.com |
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Lists: | pgsql-general |
> > Is it
> > possible to have FK that spans into child tables?
>
> This is a well known (and documented, see [1]) deficiency. It's due to
> the current implementation of indices, which are bound to exactly one
> table, meaning they do return a position within the table, but cannot
> point to different tables.
Is this set to be fixed in any particular release?
(Here's hoping that someone smarter than I am is working on it...)
-W
From: | Scott Ribe <scott_ribe(at)killerbytes(dot)com> |
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To: | Webb Sprague <webb(dot)sprague(at)gmail(dot)com> |
Cc: | <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Inheritance fixing timeline? (Was "Inherited FK Indexing") |
Date: | 2007-10-01 13:41:40 |
Message-ID: | C3265534.8178F%scott_ribe@killerbytes.com |
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Lists: | pgsql-general |
> Is this set to be fixed in any particular release?
Depending on what you're doing, this may be overkill, but: I have child
tables that not only need FK constraints, but also triggers and the
functions called by the triggers. So instead of writing this over and over
again, I eventually wrote a single procedure that takes the name of the
table, and using dynamic sql (execute command), generates the FKs and the
procedures and the triggers.
You *could* take it a step further, and have a procedure which takes the
name of the base table, finds all inherited tables, and makes sure
everything is set up correctly. I haven't, and probably won't, because I'm a
solo developer and don't make additions to the schema at such a great rate
that I would have trouble remembering to run my current "FooChild_Setup"
function on a new table.
--
Scott Ribe
scott_ribe(at)killerbytes(dot)com
http://www.killerbytes.com/
(303) 722-0567 voice
From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
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To: | Webb Sprague <webb(dot)sprague(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Inheritance fixing timeline? (Was "Inherited FK Indexing") |
Date: | 2007-10-01 16:33:35 |
Message-ID: | 20071001163335.GA5914@alvh.no-ip.org |
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Lists: | pgsql-general |
Webb Sprague escribió:
> > > Is it
> > > possible to have FK that spans into child tables?
> >
> > This is a well known (and documented, see [1]) deficiency. It's due to
> > the current implementation of indices, which are bound to exactly one
> > table, meaning they do return a position within the table, but cannot
> > point to different tables.
>
> Is this set to be fixed in any particular release?
No, sorry.
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support