it and have it in case we need it for some special case.

sure to clean up the already-created lock object, if it has no other
references.  Avoids possibly-permanent leak of shared memory.

((Snapshot) NULL) can no longer be confused with a valid snapshot,
as per my recent suggestion.  Define a macro InvalidSnapshot for 0.
Use InvalidSnapshot instead of SnapshotAny as the do-nothing special
case for heap_update and heap_delete crosschecks; this seems a little
cleaner even though the behavior is really the same.

will be cleaned up at end of transaction, even when there is no other LO
operation in the transaction.  Per bug report from Daniel Schuchardt.

than /dev/null, which Win32 doesn't have.

< * Have AFTER triggers execute after the appropriate SQL statement in a
> * -Have AFTER triggers execute after the appropriate SQL statement in a

as per bug #1249; and remove the last vestiges of using \connect to
change authorization.

rather than when returning to the idle loop.  This makes no particular
difference for interactively-issued queries, but it makes a big difference
for queries issued within functions: trigger execution now occurs before
the calling function is allowed to proceed.  This responds to numerous
complaints about nonintuitive behavior of foreign key checking, such as
http://archives.postgresql.org/pgsql-bugs/2004-09/msg00020.php, and
appears to be required by the SQL99 spec.
Also take the opportunity to simplify the data structures used for the
pending-trigger list, rename them for more clarity, and squeeze out a
bit of space.

> * Make row-wise comparisons work per SQL spec
>

> * Remove Win32 rename/unlink looping if unnecessary

-It fixes up some bugs with handling setval calls
-Adds upgrade instructions from prior versions
-Improved the sample config file
-Fixed some things in the clean_pending script

name first, make sure \di+ shows description last, and make \dl SQL look
a little more standard.

pgtest.

status.  In particular, I see no reason for deferredTriggerCheckState
to make an explicit entry to note that a particular trigger has its
default state --- that just clutters a list that should normally be
empty or very short.  I have plans to revise this module much more
heavily, but this is a simple separable improvement.