PHP: MySQL Functions (PDO_MYSQL) - Manual

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PDO_MYSQL DSN mysql_unbuffered_query

Last updated: Sat, 27 Jan 2007

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# XCVI. MySQL Functions (PDO_MYSQL)

# Введение

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.

Внимание
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.

# Предопределенные константы

The constants below are defined by this driver, and will only be available when the extension has been either compiled into PHP or dynamically loaded at runtime. In addition, these driver-specific constants should only be used if you are using this driver. Using mysql-specific attributes with the postgres driver may result in unexpected behaviour. PDO::getAttribute() may be used to obtain the `PDO_ATTR_DRIVER_NAME` attribute to check the driver, if your code can run against multiple drivers.

`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.

  Пример 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.

add a note User Contributed Notes
MySQL Functions (PDO_MYSQL)
dibakar at talash dot net
11-Sep-2006 11:31
`PDO is much better option for calling procedures, views or triggers of mysql 5.x versions from PHP instead of using mysqli extension. Following is a simple demo script which can help anybody on how to call and use mysql procedures through php
try {
$dbh = new PDO('mysql:host=xxx;port=xxx;dbname=xxx', 'xxx', 'xxx', array( PDO::ATTR_PERSISTENT => false));
$stmt = $dbh->prepare("CALL getname()");
// call the stored procedure
$stmt->execute();
echo "<B>outputting...</B><BR>";
while ($rs = $stmt->fetch(PDO::FETCH_OBJ)) {
echo "output: ".$rs->name."<BR>";
}
echo "<BR><B>".date("r")."</B>";
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}`
add a note
PDO_MYSQL DSN mysql_unbuffered_query

Last updated: Sat, 27 Jan 2007
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