BAZA WIEDZY
KURSY
Bazy danych w PHP
Kurs AdvancedAJAX
Kurs ASP
Kurs ASP.NET
Kurs C++
Kurs CSS
Kurs HTML
Kurs HTML drugi
Kurs JavaScript
Kurs MySQL
Kurs PHP
Kurs RSS
Kurs XHTML
Obiekty DOM
MANUALE
CSS1 - W3C
DOM - w budowie
PHP 2005
PHP 2006
Wyrażenia regularne
SHOUTBOX
STAT
Online: 17 | UU: 576

sybase_unbuffered_query

(PHP 4 >= 4.3.0, PHP 5)

sybase_unbuffered_query -- Send a Sybase query and do not block

Description

resource sybase_unbuffered_query ( string query, resource link_identifier [, bool store_result] )

Returns a positive Sybase result identifier on success, or FALSE on error.

Notatka: Ta funkcja jest dostępna tylko jeśli za interfejs do Sybase służy biblioteka CT, nie DB.

sybase_unbuffered_query() sends a query to the currently active database on the server that's associated with the specified link identifier. If the link identifier isn't specified, the last opened link is assumed. If no link is open, the function tries to establish a link as if sybase_connect() was called, and use it.

Unlike sybase_query(), sybase_unbuffered_query() reads only the first row of the result set. sybase_fetch_array() and similar function read more rows as needed. sybase_data_seek() reads up to the target row. The behavior may produce better performance for large result sets.

sybase_num_rows() will only return the correct number of rows if all result sets have been read. To Sybase, the number of rows is not known and is therefore computed by the client implementation.

Notatka: If you don't read all of the resultsets prior to executing the next query, PHP will raise a warning and cancel all of the pending results. To get rid of this, use sybase_free_result() which will cancel pending results of an unbuffered query.

The optional store_result can be FALSE to indicate the resultsets shouldn't be fetched into memory, thus minimizing memory usage which is particularly interesting with very large resultsets.

Przykład 1. sybase_unbuffered_query() example

<?php

$dbh
= sybase_connect('SYBASE', '', '');
$q = sybase_unbuffered_query('select firstname, lastname from huge_table', $dbh, false);
sybase_data_seek($q, 10000);
$i = 0;

while (
$row = sybase_fetch_row($q)) {
    echo
$row[0], ' ', $row[1], '<br />';
    if (
$i++ > 40000) {
        break;
    }
}

sybase_free_result($q);
sybase_close($dbh);

?>

See also sybase_query().

| | | |
Copyright © 2006-2013 egrafik.pl | Kontakt | Reklama | Projekty domów
jocker