pg_get_result

(PHP 4 >= 4.2.0, PHP 5)

pg_get_result 取得异步查询结果

说明

resource pg_get_result ([ resource $connection ] )

pg_get_result() 取得执行 pg_send_query() 而得到的查询结果资源。pg_send_query() 可以向 PostgreSQL 发送多个查询, pg_get_result() 则用来逐个得到查询结果。返回值为查询结果资源号。如果没有更多查询结果,则返回 FALSE

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User Contributed Notes 3 notes

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1
william at 25thandClement dot com
9 years ago
There is no way to poll/wait for a notification to come in. You either have to enter a busy loop or sleep. Both options are horrible. It would be nice for PHP to provide access to PQsocket so one could select() on the socket connection. This is how it's done from C or Perl.
up
-1
gullevek at gullevek dot org
9 months ago
To have a a simple wait output with async queries you can use the pg_connection_busy command:

<?php
$dbh
= pg_connect("host=XXX user=XXX password=XXX dbname=XXX");
if (!
$dbh)
{
    print
"Failed to connect";
    exit;
}

$query = "SELECT pg_sleep(10)";
if (!
pg_connection_busy($dbh))
{
   
$sent = pg_send_query($dbh, $query);
    print
"Sent query, waiting: ";
    while (
pg_connection_busy($dbh)
    {
        print
".";
       
flush();
    }
   
$res = pg_get_result($dbh);
    print
"<br>"; // or \n
   
print "Result is: $res";
}

pg_close($dbh);
?>
up
-1
Marko Tiikkaja
5 years ago
william at 25thandClement dot com said: "There is no way to poll/wait for a notification to come in. .."
Yes, there is. If there is a query in progress, pg_get_result() will block and return the result of that query when it's complete.
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