MySQL Functions (PDO_MYSQL)
소개
PDO_MYSQL is a driver that implements the PHP Data Objects (PDO) interface to enable access from PHP to MySQL 3.x, 4.x and 5.x databases.
PDO_MYSQL will take advantage of native prepared statement support present in MySQL 4.1 and higher. If you're using an older version of the mysql client libraries, PDO will emulate them for you.
Beware: Some MySQL table types (storage engines) do not support transactions. When writing transactional database code using a table type that does not support transactions, MySQL will pretend that a transaction was initiated successfully. In addition, any DDL queries issued will implicitly commit any pending transactions.
예약 상수
아래 상수는 이 드라이버에서 정의된 것으로, 확장을 PHP에 컴파일하였거나 실행중에 동적 로드하였을 때만 사용할 수 있습니다. 추가로, 드라이버-특정 상수는 이 드라이버를 사용할 때만 사용할 수 있습니다. mysql-특정 속성를 postgres 드라이버에서 사용하면 기대하지 않은 작동을 할 수 있습니다. 코드에서 여러 드라이버를 실행한다면, PDO::getAttribute()를 사용하여 PDO_ATTR_DRIVER_NAME 속성으로 드라이버를 확인할 수 있습니다.
- PDO::MYSQL_ATTR_USE_BUFFERED_QUERY (integer)
-
If this attribute is set to TRUE on a
PDOStatement, the MySQL driver will use the
buffered versions of the MySQL API. If you're writing portable code, you
should use PDOStatement::fetchAll() instead.
Example#1 Forcing queries to be buffered in mysql
<?php
if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
$stmt = $db->prepare('select * from foo',
array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));
} else {
die("my application only works with mysql; I should use \$stmt->fetchAll() instead");
}
?> - PDO::MYSQL_ATTR_LOCAL_INFILE (integer)
-
Enable LOAD LOCAL INFILE.
- PDO::MYSQL_ATTR_INIT_COMMAND (integer)
-
Command to execute when connecting to the MySQL server. Will automatically be re-executed when reconnecting.
- PDO::MYSQL_ATTR_READ_DEFAULT_FILE (integer)
-
Read options from the named option file instead of from my.cnf.
- PDO::MYSQL_ATTR_READ_DEFAULT_GROUP (integer)
-
Read options from the named group from my.cnf or the file specified with MYSQL_READ_DEFAULT_FILE.
- PDO::MYSQL_ATTR_MAX_BUFFER_SIZE (integer)
-
Maximum buffer size. Defaults to 1 MiB.
- PDO::MYSQL_ATTR_DIRECT_QUERY (integer)
-
Perform direct queries, don't use prepared statements.