support for a nonsegmented mode from md.c.  Per recent discussions, there
doesn't seem to be much value in a "never segment" option as opposed to
segmenting with a suitably large segment size.  So instead provide a
configure-time switch to set the desired segment size in units of gigabytes.
While at it, expose a configure switch for BLCKSZ as well.

Zdenek Kotala

abbreviations.  It doesn't conflict with any other abbreviation
so there seems no reason not to include it.  Per a recent gripe.

it vary with BLCKSZ as before.  This agrees with what the documentation says,
and avoids a regression test problem when BLCKSZ is larger than default.
Per recent discussion.

a user-supplied TID is out of range for the relation.  This is needed to
preserve compatibility with our pre-8.3 behavior, and it is sensible anyway
since if the query were implemented by brute force rather than optimized
into a TidScan, the behavior for a non-existent TID would be zero rows out,
never an error.  Per gripe from Gurjeet Singh.

Andreas Scherbaum

makeFloatConst, and avoid "manual" construction of A_Const nodes in grammar
productions, in favor of using makeXXXConst subroutines.

The capability for changing language owners is new in 8.3, so that's how
far back this needs to be backpatched.

Per bug #4132 by Kirill Simonov.

Brendan Jurd, minor editorialization by me.

of functions.

test.  We have seen some buildfarm failures that seem to be due to this
limit being unexpectedly exceeded when the machine is under load.

> #A hyphen, "-", marks changes that will appear in the upcoming 8.4 release.#

which is a global variable not a function, and so the probe failed on machines
where the linker makes a distinction (cf. Red Hat bug #444317).  Probe for
an actual function instead.

array's subscripts.

Pavel Stehule, some editorialization by me.

them.

do CancelBackup at a sane place, fix some oversights in the state transitions,
allow only superusers to connect while we are waiting for backup mode to end.

* Allow adding/renaming/removing enumerated values to an existing
  enumerated data type
>
>   http://archives.postgresql.org/pgsql-hackers/2008-04/msg01718.php
>

> * Allow adding/renaming/removing enumerated values to an existing
>   enumerated data type

flags by separate AT_SetNotNull subcommands.  That was always ugly and
inefficient, and it's now clear that it was merely a partial workaround
for the bug just identified in ATExecAddColumn.  This is just code
beautification not a bug fix, so no back-patch.

Brendan Jurd, with some trivial additional cleanup by me.

< * Allow adding enumerated values to an existing enumerated data
> * Allow adding/removing enumerated values to an existing enumerated data

checked to see if it's been initialized to all non-nulls.  The implicit NOT
NULL constraint was not being checked during the ALTER (in fact, not even if
there was an explicit NOT NULL too), because ATExecAddColumn neglected to
set the flag needed to make the test happen.  This has been broken since
the capability was first added, in 8.0.

Brendan Jurd, per a report from Kaloyan Iliev.

> * Allow prepared transactions with temporary tables created and dropped
>   in the same transaction, and when an ON COMMIT DELETE ROWS temporary
>   table is accessed
>
>   http://archives.postgresql.org/pgsql-hackers/2008-03/msg00047.php

>
> 	o Impove COPY performance
>
> 	  http://archives.postgresql.org/pgsql-hackers/2008-02/msg00954.php

* Allow index scans to return matching index keys, not just the matching
  heap locations
>
>   http://archives.postgresql.org/pgsql-hackers/2008-04/msg01657.php
>

> * Allow index scans to return matching index keys, not just the matching
>   heap locations

<
> * Allow adding enumerated values to an existing enumerated data
>   type

< * Allow index scans to return matching index keys
<
<   http://archives.postgresql.org/pgsql-hackers/2007-03/msg01079.php

* Consider smaller indexes that record a range of values per heap page,
  rather than having one index entry for every heap row

Laurenz Albe

>   http://archives.postgresql.org/pgsql-hackers/2008-04/msg01589.php

<
> 	o Add prompt escape to display the client and server versions

>   http://archives.postgresql.org/pgsql-hackers/2008-04/msg01475.php

have pg_ctl warn about this.

Cancel running online backups (by renaming the backup_label file,
thus rendering the backup useless) when shutting down in fast mode.

Laurenz Albe

<craig@postnewspapers.com.au>.
It was my mistake, I missed limitation of number of held locks, now GIN doesn't
use continiuous locks, but still hold buffers pinned to prevent interference
with vacuum's deletion algorithm.

Backpatch is needed.

it now lives (per discussion). Leave the other FAQs alone for now.