Функции за работа с MySQL
PHP Manual

mysql_unbuffered_query

(PHP 4 >= 4.0.6, PHP 5)

mysql_unbuffered_querySend an SQL query to MySQL, without fetching and buffering the result rows

Описание

resource mysql_unbuffered_query ( string $query [, resource $link_identifier ] )

mysql_unbuffered_query() sends a SQL query query to MySQL, without fetching and buffering the result rows automatically, as mysql_query() does. On the one hand, this saves a considerable amount of memory with SQL queries that produce large result sets. On the other hand, you can start working on the result set immediately after the first row has been retrieved: you don't have to wait until the complete SQL query has been performed. When using multiple DB-connects, you have to specify the optional parameter link_identifier .

Параметри

query

A SQL query

Data inside the query should be properly escaped.

link_identifier

Връзката към MySQL. Ако не е указана, се използва последната създадена връзка от mysql_connect(). Ако не намери такава връзка, ще направи опит да установи връзка, все едно е изпълнена mysql_connect() без параметри. Ако случайно не е намерена или създадена никаква връзка, ще се генерира предупреждение от ниво E_WARNING.

Връщани стойности

For SELECT, SHOW, DESCRIBE or EXPLAIN statements, mysql_unbuffered_query() returns a resource on success, or FALSE on error.

For other type of SQL statements, UPDATE, DELETE, DROP, etc, mysql_unbuffered_query() returns TRUE on success or FALSE on error.

Бележки

Забележка: The benefits of mysql_unbuffered_query() come at a cost: You cannot use mysql_num_rows() and mysql_data_seek() on a result set returned from mysql_unbuffered_query(). You also have to fetch all result rows from an unbuffered SQL query, before you can send a new SQL query to MySQL.

Вж. също


Функции за работа с MySQL
PHP Manual