This one should work much better than the one I sent in previously. The
functionality is the same, but the patch was missing one file resulting
in
the compilation failing. The docs also received a minor fix.

Peter Eisentraut                  Sernanders väg 10:115

PQconnectStart
PQconnectPoll
PQresetStart
PQresetPoll
PQsetenvStart
PQsetenvPoll
PQsetenvAbort

and brings into the published interface

PQsetenv.

The first four are asynchronous analogues of PQconnectdb and PQreset -
they allow an application to connect to the DB without blocking on
remote I/O.

The PQsetenv functions perform an environment negotiation with the
server.

Internal to libpq, pqReadReady and pqWriteReady have been made available
across the library (they were previously static functions inside
fe-misc.c).  A lot of internal rearrangement has been necessary to
support these changes.

The API documentation has been updated also.

Caveats:

  o  The Windows code does not default to using non-blocking sockets,
since I have no documentation: Define WIN32_NON_BLOCKING_CONNECTIONS to
do that.

  o  The SSL code still blocks.


Ewan Mellor.

You have CommLog and Debug enabled
You encounter in error in any operation (SQLConnect/SQLExec).
Previously, the extra logging didn't check for NULL pointers
when trying to print some of the strings- the socket error
message could frequently be NULL by design (if there was no socket
error)
and Solaris does not handle NULLS passed to things like printf
("%s\n",string);
gracefully.
This basically duplicates the functionality found in Linux where passing
a null pointer
to printf prints "(NULL)". No very elegant, but the logging is for debug
only anyway.

Dirk Niggemann

TO_DATE()
and PgSQL extension FROM_CHAR().

TO_CHAR() routine allow formating text output with a datetime values:

        SELECT TO_CHAR('now'::datetime, '"Now is: "HH24:MI:SS');
        to_char
        ----------------
        Now is: 21:04:10

FROM_CHAR() routine allow convert text to a datetime:

        SELECT FROM_CHAR('September 1999 10:20:30', 'FMMonth YYYY
HH:MI:SS');
        from_char
        -----------------------------
        Wed Sep 01 10:20:30 1999 CEST

TO_DATE() is equal with FROM_CHAR(), but output a Date only:

        SELECT TO_DATE('September 1999 10:20:30', 'FMMonth YYYY
HH:MI:SS');
        to_date
        ----------
        09-01-1999


In attache is compressed dir for the contrib. All is prepared, but I'am
not
sure if Makefile is good (probably yes).

Comments & suggestions ?


Thomas, thank you for your good advices.

                                                        Karel


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

Karel Zak <zakkr@zf.jcu.cz>
http://home.zf.jcu.cz/~zakkr/

Adriaan Joubert

Peter.

table owner in order to vacuum a table.  This is mainly to prevent
denial-of-service attacks via repeated vacuums.  Allow VACUUM to gather
statistics about system relations, except for pg_statistic itself ---
not clear that it's worth the trouble to make that case work cleanly.
Cope with possible tuple size overflow in pg_statistic tuples; I'm
surprised we never realized that could happen.  Hold a couple of locks
a little longer to try to prevent deadlocks between concurrent VACUUMs.
There still seem to be some problems in that last area though :-(

after...

expressions were written without spaces between operators and operands.
Problem was that something like "if new.f1=new.f2 then" would be translated
to "if $1=$2 then", and the Postgres lexer would tokenize that the wrong
way.  Fix is to emit spaces around $paramno constructs to ensure they are
seen as separate tokens.

parallel --- and, not incidentally, removing a common reason for needing
manual cleanup by the DB admin after a crash.  Remove initial global
delete of pg_statistics rows in VACUUM ANALYZE; this was not only bad
for performance of other backends that had to run without stats for a
while, but it was fundamentally broken because it was done outside any
transaction.  Surprising we didn't see more consequences of that.
Detect attempt to run VACUUM inside a transaction block.  Check for
query cancel request before starting vacuum of each table.  Clean up
vacuum's private portal storage if vacuum is aborted.

By dropping stats rows here, we eliminate the need for VACUUM to do a
wholesale remove of stats rows.  Before, pg_statistics was wiped clean
at the start of VACUUM, ensuring poor planning results for any backends
running in parallel until VACUUM got around to rebuilding the stats for
the relations they are accessing.

testing concurrent VACUUMs.

Thanks to Hiroshi for spotting the problem.

regress test expected outputs for change in 'Cannot insert a duplicate key'
error message wording.

rate
  it's better than what used to be there.

* Does proper SQL "host variable" substitution as pointed out by Andreas
  Zeugwetter (thanks): select * from :foo; Also some changes in how ':'
  and ';' are treated (escape with \ to send to backend). This does
_not_
  affect the '::' cast operator, but perhaps others that contain : or ;
  (but there are none right now).

* To show description with a <something> listing, append '?' to command
  name, e.g., \df?. This seemed to be the convenient and logical
solution.
  Or append a '+' to see more useless information, e.g., \df+.

* Fixed fflush()'ing bug pointed out by Jan during the regression test
  discussion.

* Added LastOid variable. This ought to take care of TODO item "Add a
  function to return the last inserted oid, for use in psql scripts"
  (under CLIENTS)
  E.g.,
insert into foo values(...);
insert into bar values(..., :LastOid);
\echo $LastOid

* \d command shows constraints, rules, and triggers defined on the table
  (in addition to indices)

* Various fixes, optimizations, corrections

* Documentation update as well


Note: This now requires snprintf(), which, if necessary, is taken from
src/backend/port. This is certainly a little weird, but it should
suffice
until a source tree cleanup is done.

Enjoy.

--
Peter Eisentraut                  Sernanders väg 10:115

comparision functions.

Added all lztext comparision functions, operators and a default
operator class for nbtree on lztext.

Jan