! DIFFERENCE (− or ∖): builds the set difference of
two tables. Let <classname>R</classname> and
<classname>S</classname>
again be two tables with the same
arity. <classname>R</classname> - <classname>S</classname>
--- 488,494 ----
<listitem>
<para>
! EXCEPT (− or ∖): builds the set difference of
src/GNUmakefile.in to src/Makefile
and
src/backend/port/Makefile.in to src/backend/port/Makefile
All configure substitutions are now done in Makefile.global.
now has an RTE of its own, and references to its outputs now are Vars
referencing the JOIN RTE, rather than CASE-expressions. This allows
reverse-listing in ruleutils.c to use the correct alias easily, rather
than painfully reverse-engineering the alias namespace as it used to do.
Also, nested FULL JOINs work correctly, because the result of the inner
joins are simple Vars that the planner can cope with. This fixes a bug
reported a couple times now, notably by Tatsuo on 18-Nov-01. The alias
Vars are expanded into COALESCE expressions where needed at the very end
of planning, rather than during parsing.
Also, beginnings of support for showing plan qualifier expressions in
EXPLAIN. There are probably still cases that need work.
initdb forced due to change of stored-rule representation.
1) Put back the error message for SQLError().
2) Change Disallow premature to handle the SELECTed
result.
3) Put back the behavior of AUTUCOMMIT mode change.
4) Fix SQLColumns for ODBC3.0.
5) Improve the handling of variable bookmark in ODBC3.0.
6) Enable Recognize Unique Index Button.
> This simple patch fixes broken Makefile, broken ApplySnapshot and
> makes all utilities honour --verbose command line option.
>
> --
> Yours, Alexey V. Borzov, Webmaster of RDW.ru
>
< * Remove brackets as multi-statement rule grouping, must use parens (Bruce)
> * -Remove brackets as multi-statement rule grouping, must use parens (Bruce)
458d457
< * Remove USING clause from pg_get_indexdef() if index is btree (Bruce)
PostgreSQL. This hash function replaces the one used by hash indexes and
the catalog cache. Hash joins use a different, relatively poor-quality
hash function, but I'll fix that later.
As suggested by Tom Lane, this patch also changes the size of the fixed
hash table used by the catalog cache to be a power-of-2 (instead of a
prime: I chose 256 instead of 257). This allows the catcache to lookup
hash buckets using a simple bitmask. This should improve the performance
of the catalog cache slightly, since the previous method (modulo a
prime) was slow.
In my tests, this improves the performance of hash indexes by between 4%
and 8%; the performance when using btree indexes or seqscans is
basically unchanged.
Neil Conway <neilconway@rogers.com>
so index is not on table during COPY.
> > AFAICT, the patch I posted to -patches a little while to enable the
> > usage of ALTER TABLE ADD PRIMARY KEY by pg_dump hasn't been applied, nor
> > is it in the unapplied patches list. I was under the impression that
> > this was in the queue for application -- did it just get lost?
Neil Conway <neilconway@rogers.com>
