Sends asynchronous query
(PHP 4 >= 4.2.0, PHP 5)
Example 1975. pg_send_query() example
The above example will output:
Code Examples / Notes » pg_send_query
Note that if you send a query without calling pg_get_result() for the previous one (supposing it has finished and the connection is not busy), the previous query will get discarded.
See for yourself (tested on php4.4.0, postgres8.0.4, Linux/FreeBSD) :
$conn = pg_connect("dbname=template1 host=localhost user=pgsql");
if ($conn === FALSE)
exit("Can't connect to db");
$q = array();
// send some queries
foreach (range(0, 500) as $i)
stack_query($q, $conn, "SELECT 'query $i' AS str;");
// receive them
$left = stack_query($q, $conn);
echo "$left left... ";
$result = pg_get_result($conn);
if ($left == 0 && $result === FALSE)
$row = pg_fetch_assoc($result);
// depending on race conditions, you wont get all your original queries here.
echo "got $row[str]\n";
function stack_query(&$queries, $conn, $sql = FALSE)
if ($sql !== FALSE)
$queries = $sql;
while (count($queries) && !pg_connection_busy($conn))
return count($queries) + (pg_connection_busy($conn) ? 1 : 0);
You will have to write a higher level of abstraction if you want a "send all queries now, receive them later" behaviour.
If there is an error in one of your queries, the queries following it will not get executed, and there will *not* be an error message displayed. The only way I can think of to determine if an SQL error happened is to use pg_trace.
"SELECT id FROM users;
SELECT * FROM customers;
SELECT name FROM countries;");
while ($result = pg_get_result($connection))
$results = $result;
The $results array will only have two items in it.
Due to a bug, OLD API does not available with PHP 4.2.0 and 4.2.1.
PHP 4.2.2 will support OLD API again and will be kept long enough.
New API will be available PHP 4.2.0 to later versions.
yohgaki at php dot net
Due to a bug, PHP 4.2.0 and 4.2.1 does not support pg_lo_import() old API. It's fixed in PHP 4.2.2.
BTW, new API will be always available from PHP 4.2.0 to later versions. Older API will be kept long enough, also.
ceco at noxis dot net
it works for me (php-4.2.1)
not like this
int pg_lo_import ( string pathname [, resource connection])
int pg_lo_import ( resource connection, string pathname )
don't know the reason
// --------- OPEN CONN ---
$conn = pg_connect("host='127.0.0.1' dbname='test' user='usertest' password='passtest'");
// --------- OPEN FILE ---
$fp = fopen('logo.gif', "r");
$buffer = fread($fp, filesize('logo.gif'));
// --------- CREATE - INSERT OID ---
$oid = pg_locreate($conn);
$rs = pg_exec($conn,"INSERT INTO test(tipo, images) VALUES('A1', $oid);");
$handle = pg_loopen ($conn, $oid, "w");
pg_lowrite ($handle, $buffer);
// --------- OPEN - INSERT OID ---
$rs = pg_exec($conn, "SELECT images FROM test WHERE tipo = 'A1';");
$row = pg_fetch_row($rs, 0);
$loid = pg_loopen($conn, $row, "r");
pg_exec ($conn, "commit");
// --------- UNLINK OID ---
$loid = $row;
pg_exec ($conn, "commit");
// --------- DELETE OID ---
pg_exec($conn, "DELETE FROM test WHERE tipo = 'A1';");
// --------- CLOSE CONN ---