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Subject: [PATCHES] 970417: some large object patches
Two patches here, made against 970417. Both have to do with large
objects:
1. lobjfuncs was not initialized in PQconnectdb. This causes
failure later if large objects are used. (Someone already
caught this error in PQsetdb.)
2. Postgres functions lo_import and lo_export sometimes
produce garbage for the file names because the filename
strings aren't always terminated by \0. (VARDATA isn't
necessarily null terminated.)
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Subject: [HACKERS] libpq variable set patch
Just a small change, so the automatic variable setting on
connection startup actually works...
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The first fixes a warning from gcc about the assignment within the condition.
The extra set of parens should not make a difference, but with -Werror, they
are necessary.
The second fixes an "ln -s" invocation that assumes the current directory is
implicitly the target if not specified. Not true in all cases, and again, it
should not make a difference except to those implementation that it does.
From: "Michael P. Snyder" <msnyder@hawkeye.huntersmoon.com>
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nicer. Also, I grabbed my copy of the Informix manual, and
added a couple of variables that make sense (formats for
money, time, a language setting, a timezone).
- New functions SetPGVariable() and GetPGVariable() in tcop/*.
These don't actually do anything for the moment, but should
be enough to implement the SET var_name TO var_val in the
parser?
SetPGVariable() expects just two strings, the var_name and
the var_value from above, and is expected to do the right thing.
Returns TRUE if everything okay.
From: "Martin J. Laubach" <mjl@wwx.vip.at>
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of common routines in pqcomprim.c (pq communication primitives).
Not all adapted to it yet, but it's a start.
- Rewritten some of those routines, to write/read bigger chunks of
data, precomputing stuff in buffers instead of sending out byte
by byte.
- As a consequence, I need to know the endianness of the machine.
Currently I rely on getting it from machine/endian.h, but this
may not be available everywhere? (Who the hell thought it was
a good idea to pass integers to the backend the other way around
than the normal network byte order? *argl*)
- Libpq looks in the environment for magic variables, and upon
establishing a connection to the backend, sends it queries
of the form "SET var_name TO 'var_value'". This needs a change
in the backend parser (Mr. Parser, are you there? :)
- Currently it looks for two Env-Vars, namely PG_DATEFORMAT
and PG_FLOATFORMAT. What else makes sense? PG_TIMEFORMAT?
PG_TIMEZONE?
From: "Martin J. Laubach" <mjl@wwx.vip.at>
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Subject: [HACKERS] password authentication
This patch adds support for plaintext password authentication. To use
it, you add a line like
host all 0.0.0.0 0.0.0.0 password pg_pwd.conf
to your pg_hba.conf, where 'pg_pwd.conf' is the name of a file containing
the usernames and password hashes in the format of the first two fields
of a Unix /etc/passwd file. (Of course, you can use a specific database
name or IP instead.)
Then, to connect with a password through libpq, you use the PQconnectdb()
function, specifying the "password=" tag in the connect string and also
adding the tag "authtype=password".
I also added a command-line switch '-u' to psql that tells it to prompt
for a username and password and use password authentication.
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Replaced NEED_STRDUP by !HAVE_STRDUP
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In particular, no more compiled-in default for PGDATA or LIBDIR. Commands
that need them need either invocation options or environment variables.
PGPORT default is hardcoded as 5432, but overrideable with options or
environment variables.
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following is the patch to libpq's large object interface that
removes the requirement to include fmgr.h into fe-lobj.c.
The large object interface now ask's the backend to tell the
OID's of all the required functions in pg_proc.
From: wieck@sapserv.debis.de (Jan Wieck)
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Submitted by: wieck@sapserv.debis.de (Jan Wieck)
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cc -shared, I believe...
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Thanks D'Arcy.
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-Kurt
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When you connect to a database with PQsetdb, as with psql, depending on
how your uninitialized variables are set, you can get a failure with a
"There is no connection to the backend" message.
The fix is to move a call to PQexec() from inside connectDB() to
PQsetdb() after connectDB() returns to PQsetdb(). That way a connection
doesn't have to be already established in order to establish it!
From: bryanh@giraffe.netgate.net (Bryan Henderson)
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Submitted by: darcy@druid.druid.com (D'Arcy J.M. Cain)
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Here are a few minor fixes to Postgres95. Mostly I have added const
to some of the char pointers. There was also a missing header file
and a place where it looks like "==" was used when "=" was meant.
I also changed some variables from Pfin and Pfout tp pfin and pfout
because the latter shadow global variables and that just seems like
an unsafe practice which I like to avoid.
Submitted by: "D'Arcy J.M. Cain" <darcy@druid.druid.com>
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Most of the changes in here look to b epurely cosmetic, and don't
affect anything...
...and some stuff is completely questionable...in that I may have reversed
some of the stuf fwe already had :(
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doesn't free the buffer allocated by this function.
- submitted by: Erich Stamberger <eberger@gewi.kfunigraz.ac.at>
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submitted by: Paul "Shag" Walmsley <ccshag@cclabs.missouri.edu>
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