current state of development...namely, we are on 2.0

NOTE:

BTW, the is also a check in postmaster which won't let you use an older
version of the database by checking the version number. The version number
of a database is in data/PG_VERSION (a plain ASCII file).

				- Andrew

all the calls with strdup.

Submitted by: darcy@druid.druid.com (D'Arcy J.M. Cain)

attributes as tcl arrays.  The previous code had problems with some chars
used as delimiter by Tcl.  The new code should be more robust.

By: Massimo Dal Zotto <dz@cs.unitn.it>

Async notifies received while a backend is in the middle of a begin/end
transaction block are lost by libpq when the final end command is issued.

The bug is in the routine PQexec of libpq. The routine throws away any
message from the backend when a message of type 'C' is received. This
type of message is sent when the result of a portal query command with
no tuples is returned. Unfortunately this is the case of the end command.
As all async notification are sent only when the transaction is finished,
if they are received in the middle of a transaction they are lost in the
libpq library. I added some tracing code to PQexec and this is the output:

Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>

execute an sql function containing an utility command (create, notify, ...).
The bug is part in the planner, which returns a number of plans different
than the number of commands if there are utility commands in the query, and
in part in the function executor which assumes that all commands are normal
query commands and causes a SIGSEGV trying to execute commands without plan.

Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>

|
|Here's a patch for Version 2 only.  It just adds an Assert to catch some
|inconsistencies in the catalog classes.
|
|--
|Bryan Henderson                                    Phone 408-227-6803
|San Jose, California
|

The problem is that the function arguments are not considered as possible key
candidates for index scan and so only a sequential scan is possible inside
the body of a function.  I have therefore made some patches to the optimizer
so that indices are now used also by functions.  I have also moved the plan
debug message from pg_eval to pg_plan so that it is printed also for plans
genereated for function execution.  I had also to add an index rescan to the
executor because it ignored the parameters set in the execution state, they
were flagged as runtime variables in ExecInitIndexScan but then never used
by the executor so that the scan were always done with any key=1. Very odd.
This means that an index rescan is now done twice for each function execution
which uses an index, the first time when the index scan is initialized and
the second when the actual function arguments are finally available for the
execution.  I don't know what is the cost of an double index scan but I
suppose it is anyway less than the cost of a full sequential scan, at leat
for large tables. This is my patch, you must also add -DINDEXSCAN_PATCH in
Makefile.global to enable the changes.

Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>

The comparison routines for text and char data type give incorrect results
if the input data contains characters greater than 127.  As these routines
perform the comparison using signed char variables all character codes
greater than 127 are interpreted as less than 0.  These codes are used to
encode the iso8859 char sets.
The other text-like data types seem to work as expected as they use unsigned
chars in comparisons.


Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>

Pointed out by: ernst.molitor@uni-bonn.de

	- code compile tested, but due to a yet unresolved problem with
          parse.h's creation, compile not completed...

	- centralizing to simplify the -I's required to compile

postgres.h already pulled in (postgres.h includes c.h)

in twice...

define to config.h

platform with a machine.h has the same BLCKSZ?

Consolidate machine.h into config.h

#include "config.h" here will (should?) ensure that any platform
dependencies defined in config.h should be reflected in all .c files...

First Step: Centralize them under on src/include hierarchy

Goals: reduce the difficulty of porting from platform to platform,
       release to release, but moving as much as possible into config.h

to be one helluva chore to clean up...

tree, instead of having include files all over the place...

Immediate goal...a 'config.h' file so that we can make #ifdef's
being used throughout the code more a rarity as far as porting
is concerned