Default implementation of DatabaseStatementInterface.
PDO allows us to extend the PDOStatement class to provide additional functionality beyond that offered by default. We do need extra functionality. By default, this class is not driver-specific. If a given driver needs to set a custom statement class, it may do so in its constructor.
Expanded class hierarchy of Statement
class Statement extends PDOStatement implements StatementInterface {
/**
* Reference to the database connection object for this statement.
*
* The name $dbh is inherited from PDOStatement.
*
* @var DatabaseConnection
*/
public $dbh;
protected function __construct($dbh) {
$this->dbh = $dbh;
$this
->setFetchMode(PDO::FETCH_OBJ);
}
public function execute($args = array(), $options = array()) {
if (isset($options['fetch'])) {
if (is_string($options['fetch'])) {
// Default to an object. Note: db fields will be added to the object
// before the constructor is run. If you need to assign fields after
// the constructor is run, see http://drupal.org/node/315092.
$this
->setFetchMode(PDO::FETCH_CLASS, $options['fetch']);
}
else {
$this
->setFetchMode($options['fetch']);
}
}
$logger = $this->dbh
->getLogger();
if (!empty($logger)) {
$query_start = microtime(TRUE);
}
$return = parent::execute($args);
if (!empty($logger)) {
$query_end = microtime(TRUE);
$logger
->log($this, $args, $query_end - $query_start);
}
return $return;
}
public function getQueryString() {
return $this->queryString;
}
public function fetchCol($index = 0) {
return $this
->fetchAll(PDO::FETCH_COLUMN, $index);
}
public function fetchAllAssoc($key, $fetch = NULL) {
$return = array();
if (isset($fetch)) {
if (is_string($fetch)) {
$this
->setFetchMode(PDO::FETCH_CLASS, $fetch);
}
else {
$this
->setFetchMode($fetch);
}
}
foreach ($this as $record) {
$record_key = is_object($record) ? $record->{$key} : $record[$key];
$return[$record_key] = $record;
}
return $return;
}
public function fetchAllKeyed($key_index = 0, $value_index = 1) {
$return = array();
$this
->setFetchMode(PDO::FETCH_NUM);
foreach ($this as $record) {
$return[$record[$key_index]] = $record[$value_index];
}
return $return;
}
public function fetchField($index = 0) {
// Call PDOStatement::fetchColumn to fetch the field.
return $this
->fetchColumn($index);
}
public function fetchAssoc() {
// Call PDOStatement::fetch to fetch the row.
return $this
->fetch(PDO::FETCH_ASSOC);
}
}
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
Statement:: |
public | property | Reference to the database connection object for this statement. | |
Statement:: |
public | function |
Executes a prepared statement Overrides StatementInterface:: |
|
Statement:: |
public | function |
Returns the result set as an associative array keyed by the given field. Overrides StatementInterface:: |
|
Statement:: |
public | function |
Returns the entire result set as a single associative array. Overrides StatementInterface:: |
|
Statement:: |
public | function |
Fetches the next row and returns it as an associative array. Overrides StatementInterface:: |
|
Statement:: |
public | function |
Returns an entire single column of a result set as an indexed array. Overrides StatementInterface:: |
|
Statement:: |
public | function |
Returns a single field from the next record of a result set. Overrides StatementInterface:: |
|
Statement:: |
public | function |
Gets the query string of this statement. Overrides StatementInterface:: |
|
Statement:: |
protected | function | ||
StatementInterface:: |
public | function | Returns the number of rows affected by the last SQL statement. | 2 |