User Contributed Notes
PostgreSQL functions |
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bleach at chek dot com
02-Mar-2000 07:36 |
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If you want to see all the objects in a database, you can find that
information in the pg_class table.
SELECT * FROM
pg_class;
Now this is going to be kind of long and complex, to see
how psql command handles the \d and other things. use the syntax. psql -E
<Database>, ie psql -E mydatabase
What this will do is show
the SQL command used for everything. So when you type a \d or something,
it shows the SQL query used for the result.
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jdb30 at cornell.edu
06-Dec-2000 07:08 |
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For further reading on PostgreSQL, see:
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!spamcraig at ahdore dot com
15-Apr-2001 08:11 |
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If you want to extract data from select statements, you need to store the
result index, and then apply pg_result to that value. Basically, do
this
$resultIdx = pg_query ($database, "select * from
tablename");
$mySelect = pg_fetch_result($resultIdx, 0, 0); //
gets column 0 of tuple 0
echo("My select:
[".$mySelect."]");
I'm new to php and had to do
some fiddling around to work this out. It's reasonably elementary, but not
demonstrated by the examples on these pages. Hopefully it will come in
useful to someone else.
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passion at monkey dot org
28-Jun-2001 01:53 |
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I've tried to mimic the following mysql database connection functions for
postgres.
These
are assuming that you're passing in $link as the result from
pg_connect:
function pg_list_dbs($link)
{
$sql =
'SELECT datname FROM pg_database';
return (pg_query($link,
$sql));
}
function pg_list_tables($link)
{
$sql = "SELECT relname FROM pg_class WHERE relname !~
'^pg_'";
return (pg_query($link, $sql));
}
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hubert at hubertmuller dot com
09-Jul-2001 11:36 |
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The best way to find the separated list of tables, sequences, keys etc
is:
SELECT relname FROM pg_class WHERE relkind='<value>'
AND relname !~ '^pg_';
<value> takes:
i for keys,
r
for relations,
S for sequences
Note that all tables names
that begins with 'pg_' are PostgreSQL internal tables (this explain why I
use AND relname !~ '^pg_' condition).
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prince_shri at yahoo dot com
31-Jul-2001 09:45 |
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in debian, you need to include
dl('pgsql.so')
in all
your scripts of php4. I think its different for PHP3 -
dl('libpg.so')
[Editor's Note]
Debian users should
be able to use "extension" directive to load pgsql.so. This
method is prefered method if you use pgsql module always.
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saberit at home dot com
15-Sep-2001 09:11 |
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I tried compiling PHP from source with PostgreSQL support (./configure
--with-pgsql=/usr/local/pgsql) and ran into a bunch of problems when
trying to 'make'. The problem was that some of the PostgreSQL headers were
not installed by default when I installed PostgreSQL from source. When
installing PostgreSQL make sure you 'make install-all-headers' after you
'make install'.
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mystran at wasteland dot pp dot htv dot fi
04-Feb-2002 02:46 |
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Nice to know fact that I didn't find documented here.
PHP will
return values of PostgreSQL boolean datatype as single character strings
"t" and "f", not PHP true and
false.
[Editor's Note]
't' or 'f' is valid boolean expression
for PostgreSQL.
All values from PostgreSQL are strings, since
PostgreSQL integer, float may be much larger than PHP's native int, double
can handle. PostgreSQL array is not supported.
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swm at php dot net
22-Aug-2002 03:49 |
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My talk on PHP and PostgreSQL which I presented at O'Reilly OSCON 2002 is
now online.
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amk at eight13 dot com
27-Nov-2002 06:36 |
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The list of postgresql function name changes is missing pg_errormessage
being changed to pg_last_error.
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anonymous at unknown dot com
29-Nov-2002 01:01 |
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Here:
you
can find the announcement for a native windows PostGreSQL port that is to
be released in december (no cygwin). It also tells you where to download
the beta ().
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anonymous at unknown dot com
29-Nov-2002 04:50 |
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I just wanted to add to my previous post I've got the system up and
running.
Environment: Windows XP, Apache 1.3.23, Php 4.3 RC2,
PostGreSQL beta4 native windows build
Installation was fairly easy:
1. read the readme.txt
2. edit the setenv.bat as described in
readme
3. run 'initdb'
all execs are in /bin
help is
accessed like <command> --help
4. Start the psql deamon - you may
want to create a batch file like
'D:\postgres_beta4\bin\postmaster
-h localhost -D D:/postgres_beta4/data'
--deamon should be up
and running now--
You can login into a shell from a console
like
'psql -h localhost -d <username>'
You must load the
postgresql extension by editing the php.ini and restarting apache in order
to access psql with php.
And one final not: when
running
$dbconn = pg_connect ("host=localhost port=5432
dbname=$dbname user=$user");
remember that $user and or $dbname is
CASESENSITIVE.
Oh yeah, I created the data dir manually - don't
know whether that was necessary
Grtz Vargo
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daniel at bichara dot com dot br
31-Dec-2002 12:04 |
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Running RedHat Linux and Apache with suexec enabled you must include
pgsql.so on each .php file using dl("pgsql.so") and remove
"extension=pgsql.so" from php.ini, otherwise Apache (httpd) will
not start.
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