* Add ISO day of week format 'ID' to to_char() where Monday = 1

* Add a field 'isoyear' to extract(), based on the ISO week

* Add SPI_gettypmod() to return the typemod for a TupleDesc

*Allow inlining of set-returning functions

*Implement inlining of set-returning functions defined in SQL

* Allow SQL-language functions to return results from RETURNING queries

several hash buckets could be stored on a single page and greater

granularity used for the hash algorithm.

http://archives.postgresql.org/pgsql-hackers/2004-06/msg00168.php

o Consider sorting hash buckets so entries can be found using a

binary search, rather than a linear scan

faster than a sequential scan it must avoid access to the heap

to obtain tuple visibility information.

* Provide a way to calculate an "estimated COUNT(*)"

Perhaps by using the optimizer's cardinality estimates or random

sampling.

http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php

* Allow data to be pulled directly from indexes

Currently indexes do not have enough tuple visibility information

* Fix priority ordering of read and write light-weight locks (Neil)

http://archives.postgresql.org/pgsql-hackers/2004-11/msg00893.php

http://archives.postgresql.org/pgsql-hackers/2004-11/msg00905.php

Startup Time Improvements

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