a) ones that are 100% backward (such as the comment about
     outputting this format)
and
  b) ones that aren't (such as deprecating the current
     postgresql shorthand of
         '1Y1M'::interval = 1 year 1 minute
     in favor of the ISO-8601
         'P1Y1M'::interval = 1 year 1 month.

Attached is a patch that addressed all the discussed issues that
did not break backward compatability, including the ability to
output ISO-8601 compliant intervals by setting datestyle to
iso8601basic.

Interval values can now be written as  ISO 8601 time intervals, using
the "Format with time-unit designators". This format always starts with
the character 'P', followed  by a string of values followed
by single character time-unit designators. A 'T' separates the date and
time parts of the interval.

Ron Mayer

tools/thread to run even if configure didn't enable threads because this
test is used before enabling threads for the OS.

from Michael Fuhr

untrusted languages (in case they sneak in).

unsigned integers).  Per report from Jim Crate.

partially-evaluated SRFs. Per report found here:
http://archives.postgresql.org/pgsql-general/2003-12/msg00851.php

Per Neil Conway.

evaluating a set-valued function.  This fixes some additional problems
with rescanning partially-evaluated SRFs.

shut down cleanly if the plan node is ReScanned before the SRFs are run
to completion.  This fixes the problem for SQL-language functions, but
still need work on functions using the SRF_XXX() macros.

was integrated into ecpg_informix.h, the other ones go into their own
subdirectory that is automatically considered by the embedded preprocessor
when in Informix mode.

Class-Shorthand Escapes<C2><AE>.  I believe it will help intrepid regex
users. :)

David Fetter

```-------------------------------------------------------------------
/*
 * relation_byte_size
 *        Estimate the storage space in bytes for a given number of tuples
 *        of a given width (size in bytes).
 */
static double
relation_byte_size(double tuples, int width)
{
        return tuples * (MAXALIGN(width) + MAXALIGN(sizeof(HeapTupleData)));
}
```

-------------------------------------------------------------------

Shouldn't this be HeapTupleHeaderData and not HeapTupleData ?

(Of course, from a costing perspective these shouldn't be very different but ...)

Sailesh Krishnamurthy

of pg_stats view definition).

where a joinclause is redundant with a restriction clause.  Original coding
believed this was impossible and didn't need to be checked for, but that
was a thinko ...

not discriminate against system columns, since we support constraints on
system columns, and in fact constraints on OID are moderately useful.

does not affect UNKNOWN-type literals or Params.  This fixes the recent
complaint about count('x') being broken, and improves consistency in
a few other respects too.

a join in its subselect.  In this situation we *must* build a bushy
plan because there are no valid left-sided or right-sided join trees.
Accordingly, hoary sanity check needs an update.  Per report from
Alessandro Depase.

a temp table

modified test case from Alexey Yudichev to be part of the testsuite

  variable listing for output variables in cursor definitions
- Fixed incorrect if call in long=>numeric conversion.

< 	o Make SET CONNECTION thread-aware
> 	o Make SET CONNECTION thread-aware, non-standard?

> 	o Make SET CONNECTION thread-aware