might change it. Experimentation shows that the signal handler call
mechanism does not save/restore errno for you, at least not on Linux
or HPUX, so this is definitely a real risk.
to ensure that we have released buffer refcounts and so forth, rather than
putting ad-hoc operations before (some of the calls to) proc_exit. Add
commentary to discourage future hackers from repeating that mistake.
Index: TODO
===================================================================
RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< Last updated: Fri Dec 15 17:40:22 EST 2000
---
> Last updated: Fri Dec 15 17:44:57 EST 2000
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> * Mark is Mark Hollomon <mhh@mindspring.com>
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> 5~
Index: TODO
===================================================================
RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< Last updated: Fri Dec 15 17:03:28 EST 2000
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> Last updated: Fri Dec 15 17:40:22 EST 2000
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> * Ross is Ross J. Reedstrom <reedstrm@wallace.ece.rice.edu>
Index: TODO
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RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< Last updated: Fri Dec 15 16:46:43 EST 2000
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> Last updated: Fri Dec 15 17:03:28 EST 2000
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> * Stephan is Stephan Szabo <sszabo@megazone23.bigpanda.com>
Index: TODO
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RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< Last updated: Tue Dec 12 23:01:53 EST 2000
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> Last updated: Fri Dec 15 16:46:43 EST 2000
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RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< * Bryan is Bryan Henderson<bryanh@giraffe.netgate.net>
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< * David is David Hartwig <daveh@insightdist.com>
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< * Hiroshi is Hiroshi Inoue<Inoue@tpf.co.jp>
---
> * Hiroshi is Hiroshi Inoue <Inoue@tpf.co.jp>
> * Karel is Karel Zak <zakkr@zf.jcu.cz>
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< * Massimo Dal Zotto <dz@cs.unitn.it>
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> * Massimo is Massimo Dal Zotto <dz@cs.unitn.it>
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< * Philip Warner <pjw@rhyme.com.au>
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> * Philip is Philip Warner <pjw@rhyme.com.au>
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< * Stefan Simkovics <ssimkovi@rainbow.studorg.tuwien.ac.at>
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< * Vadim is "Vadim B. Mikheev" <vadim4o@email.com>
---
> * Vadim is Vadim B. Mikheev <vadim4o@email.com>
> Date: Thu, 14 Dec 2000 12:44:47 +0100 (CET)
> From: Kovacs Zoltan Sandor <tip@pc10.radnoti-szeged.sulinet.hu>
> To: pgsql-bugs@postgresql.org
> Subject: [BUGS] to_char() causes backend to close connection
>
> Hi, this query gives different strange results:
>
> select to_char(now()::abstime,'YYMMDDHH24MI');
>
> I get e.g. a "backend closed the channel unexpectedly..." error with
> successful or failed resetting attempt (indeterministic)
Again thanks Kovacs, you found really designing bug, that appear
if anyone write bad format template to "number" version of to_char()
(as you with 'DD').
Karel
comparison does not consider paths different when they differ only in
uninteresting aspects of sort order. (We had a special case of this
consideration for indexscans already, but generalize it to apply to
ordered join paths too.) Be stricter about what is a canonical pathkey
to allow faster pathkey comparison. Cache canonical pathkeys and
dispersion stats for left and right sides of a RestrictInfo's clause,
to avoid repeated computation. Total speedup will depend on number of
tables in a query, but I see about 4x speedup of planning phase for
a sample seven-table query.
OIDs rather than names. Aside from being simpler and faster, this way
doesn't blow up in the face of 'create temp table foo () inherits (foo)'.
Which is a rather odd thing to do, but it seems some people want to.
Index: TODO
===================================================================
RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< Last updated: Tue Dec 12 23:01:04 EST 2000
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> Last updated: Tue Dec 12 23:01:53 EST 2000
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< * test to show diffs for TODO changes
Index: TODO
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RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/TODO,v
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< Last updated: Tue Dec 12 15:27:50 EST 2000
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> Last updated: Tue Dec 12 23:01:04 EST 2000
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> * test to show diffs for TODO changes
avoid repeated evaluations in cost_qual_eval(). This turns out to save
a useful fraction of planning time. No change to external representation
of RestrictInfo --- although that node type doesn't appear in stored
rules anyway.
the first paragraph:
As an example, say we wish to find all the records that
are in the temperature range of other records. In
effect, we need to compare the temp_lo and temp_hi
attributes of each EMP instance to the temp_lo and
temp_hi attributes of all other EMP instances.
I believe that EMP should read WEATHER, as the example query that
follows joins WEATHER to itself.
EMP is often used in Oracle examples.
Regards,
Graham
Other RULE cleanups
Tom Lane