Send an SQL query to MySQL without fetching and buffering the result rows.
This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:
|See: Buffered and Unbuffered queries|
resource mysql_unbuffered_query(string query,
resource link_identifier= =NULL);
sends the SQL query
query to MySQL
without automatically fetching and buffering the result rows as
does. This saves a considerable amount of memory with SQL
queries that produce large result sets, and you can start
working on the result set immediately after the first row has
been retrieved as you don't have to wait until the complete
SQL query has been performed. To use
while multiple database connections are open, you must specify
the optional parameter
identify which connection you want to use.
The SQL query to execute.
Data inside the query should be properly escaped.
The MySQL connection. If the link identifier is not
specified, the last link opened by
is assumed. If no such link is found, it will try to
create one as if
was called with no arguments. If no connection is found
or established, an
level error is generated.
For SELECT, SHOW, DESCRIBE or EXPLAIN statements,
returns a resource on success, or
For other type of SQL statements, UPDATE, DELETE, DROP, etc,
on success or
The benefits of
come at a cost: you cannot use
on a result set returned from
until all rows are fetched. You also have to fetch all result
rows from an unbuffered SQL query before you can send a new
SQL query to MySQL, using the same