date/time formats and conventions.

Remove declarations in builtins.h duplicated in dt.h.
Change a few return type declarations to use "type *"
 rather than "struct ...".

 Formerly allowed only single arguments.
Declare column constraints using the usual list mechanism rather
 than explicit itemized lists.
Remove NOTNULL from default clause syntax (retain "NOT NULL").
 NOTNULL is not SQL92; eventually remove it from expressions too?
Move ISNULL, NOTNULL to Postgres-specific token declarations.
Fix up tabs and indenting on new CREATE USER commands.

	...malloc/free -> palloc/pfree
	...fopen/fclose -> AllocateFile/FreeFile

Check for duplicate implicit index names and generate unique names.

 Most other messages do not have one.

Add code to set DATADIR in postmaster.c if -D is used

Put all configurable parameters near top of file.
Remove explicit path to postmaster executable.
More comments.

src. It is in the function ParseACL. When I find that I
can not allocate enough memory for the ACL structure I
return an NULL instead of doing an exit_nicely(g_conn);

From: Matthew C Aycock <maycock@scuba.pcpipeline.com>

Add tests for PRIMARY KEY and UNIQUE clauses.

Add new constraint types PRIMARY, UNIQUE.

Remove TimeRange node type tag (everything else already gone).

 Probably have it wrong (dd.mm/yyyy) but can change it when we know.
 Input routines always handled it.

 Most processors should optimize this a bit better wrt cache prefetch.

 IndexStmt, IndexElem, ColumnDef).

Change reference to field inside to be compatible with new definition
 as a "node" structure rather than a specialty structure.

Implement PRIMARY KEY and UNIQUE clauses using indices.

 of integer Unix system times.

Clean up formatting of code

Integrate new functions into dumpTable


This is not tested yet...have to recompile server due to patches from
Todd...but this compiles cleanly as it stands now

An extension to the code to allow for a pg_password authentication database
that is *seperate* from the system password file