Description
resource
mysql_unbuffered_query ( string query [, resource link_identifier [, int result_mode]])
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.
The optional result_mode parameter
can be MYSQL_USE_RESULT and MYSQL_STORE_RESULT. It
defaults to MYSQL_USE_RESULT, so the result is not buffered.
See also mysql_query() for the
counterpart of this behaviour.
Note:
The benefits of mysql_unbuffered_query() come
at a cost: You cannot use mysql_num_rows() 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.
See also: mysql_query().
