MySQL: calculating when query ready

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LEARN ABOUT PHP

mysql_unbuffered_query

MYSQL_UNBUFFERED_QUERY(3)						 1						 MYSQL_UNBUFFERED_QUERY(3)

mysql_unbuffered_query - Send an SQL query to MySQL without fetching and buffering the result rows.

SYNOPSIS

       Warning

	      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:

		     oSee: Buffered and Unbuffered queries

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

DESCRIPTION

       mysql_unbuffered_query(3) sends the  SQL  query	$query	to  MySQL  without  automatically  fetching  and  buffering  the  result  rows	as
       mysql_query(3)  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  per-
       formed.	To use mysql_unbuffered_query(3) while multiple database connections are open, you must specify the optional parameter $link_iden-
       tifier to identify which connection you want to use.

	      o $query
		- The SQL query to execute.  Data inside the query should be properly escaped.

	      o $
		link_identifier -The MySQL connection. If the link identifier is not specified,  the  last  link  opened  by  mysql_connect(3)	is
		assumed. If no such link is found, it will try to create one as if mysql_connect(3) was called with no arguments. If no connection
		is found or established, an E_WARNING level error is generated.

	For SELECT, SHOW, DESCRIBE or EXPLAIN statements, mysql_unbuffered_query(3) returns a resource on success, or FALSE on error.

	For other type of SQL statements, UPDATE, DELETE, DROP, etc, mysql_unbuffered_query(3) returns TRUE on success or FALSE on error.

       Note

	       The benefits of mysql_unbuffered_query(3) come at a cost: you cannot use mysql_num_rows(3) and mysql_data_seek(3) on a  result  set
	      returned	from  mysql_unbuffered_query(3), 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 $link_identifier.

       mysql_query(3).

PHP Documentation Group 												 MYSQL_UNBUFFERED_QUERY(3)

Programming