508 řádky
14 KiB
PHP
508 řádky
14 KiB
PHP
<?php
|
|
|
|
/**
|
|
* @file
|
|
* Database interface code for engines that need complete control over their
|
|
* result sets. For example, SQLite will prefix some column names by the name
|
|
* of the table. We post-process the data, by renaming the column names
|
|
* using the same convention as MySQL and PostgreSQL.
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup database
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* An implementation of DatabaseStatementInterface that prefetches all data.
|
|
*
|
|
* This class behaves very similar to a PDOStatement but as it always fetches
|
|
* every row it is possible to manipulate those results.
|
|
*/
|
|
class DatabaseStatementPrefetch implements Iterator, DatabaseStatementInterface {
|
|
|
|
/**
|
|
* The query string.
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $queryString;
|
|
|
|
/**
|
|
* Driver-specific options. Can be used by child classes.
|
|
*
|
|
* @var Array
|
|
*/
|
|
protected $driverOptions;
|
|
|
|
/**
|
|
* Reference to the database connection object for this statement.
|
|
*
|
|
* The name $dbh is inherited from PDOStatement.
|
|
*
|
|
* @var DatabaseConnection
|
|
*/
|
|
public $dbh;
|
|
|
|
/**
|
|
* Main data store.
|
|
*
|
|
* @var Array
|
|
*/
|
|
protected $data = array();
|
|
|
|
/**
|
|
* The current row, retrieved in PDO::FETCH_ASSOC format.
|
|
*
|
|
* @var Array
|
|
*/
|
|
protected $currentRow = NULL;
|
|
|
|
/**
|
|
* The key of the current row.
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $currentKey = NULL;
|
|
|
|
/**
|
|
* The list of column names in this result set.
|
|
*
|
|
* @var Array
|
|
*/
|
|
protected $columnNames = NULL;
|
|
|
|
/**
|
|
* The number of rows affected by the last query.
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $rowCount = NULL;
|
|
|
|
/**
|
|
* The number of rows in this result set.
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $resultRowCount = 0;
|
|
|
|
/**
|
|
* Holds the current fetch style (which will be used by the next fetch).
|
|
* @see PDOStatement::fetch()
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $fetchStyle = PDO::FETCH_OBJ;
|
|
|
|
/**
|
|
* Holds supplementary current fetch options (which will be used by the next fetch).
|
|
*
|
|
* @var Array
|
|
*/
|
|
protected $fetchOptions = array(
|
|
'class' => 'stdClass',
|
|
'constructor_args' => array(),
|
|
'object' => NULL,
|
|
'column' => 0,
|
|
);
|
|
|
|
/**
|
|
* Holds the default fetch style.
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $defaultFetchStyle = PDO::FETCH_OBJ;
|
|
|
|
/**
|
|
* Holds supplementary default fetch options.
|
|
*
|
|
* @var Array
|
|
*/
|
|
protected $defaultFetchOptions = array(
|
|
'class' => 'stdClass',
|
|
'constructor_args' => array(),
|
|
'object' => NULL,
|
|
'column' => 0,
|
|
);
|
|
|
|
public function __construct(DatabaseConnection $connection, $query, array $driver_options = array()) {
|
|
$this->dbh = $connection;
|
|
$this->queryString = $query;
|
|
$this->driverOptions = $driver_options;
|
|
}
|
|
|
|
/**
|
|
* Executes a prepared statement.
|
|
*
|
|
* @param $args
|
|
* An array of values with as many elements as there are bound parameters in the SQL statement being executed.
|
|
* @param $options
|
|
* An array of options for this query.
|
|
* @return
|
|
* TRUE on success, or FALSE on failure.
|
|
*/
|
|
public function execute($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);
|
|
}
|
|
|
|
// Prepare the query.
|
|
$statement = $this->getStatement($this->queryString, $args);
|
|
if (!$statement) {
|
|
$this->throwPDOException();
|
|
}
|
|
|
|
$return = $statement->execute($args);
|
|
if (!$return) {
|
|
$this->throwPDOException();
|
|
}
|
|
|
|
// Fetch all the data from the reply, in order to release any lock
|
|
// as soon as possible.
|
|
$this->rowCount = $statement->rowCount();
|
|
$this->data = $statement->fetchAll(PDO::FETCH_ASSOC);
|
|
// Destroy the statement as soon as possible. See
|
|
// DatabaseConnection_sqlite::PDOPrepare() for explanation.
|
|
unset($statement);
|
|
|
|
$this->resultRowCount = count($this->data);
|
|
|
|
if ($this->resultRowCount) {
|
|
$this->columnNames = array_keys($this->data[0]);
|
|
}
|
|
else {
|
|
$this->columnNames = array();
|
|
}
|
|
|
|
if (!empty($logger)) {
|
|
$query_end = microtime(TRUE);
|
|
$logger->log($this, $args, $query_end - $query_start);
|
|
}
|
|
|
|
// Initialize the first row in $this->currentRow.
|
|
$this->next();
|
|
|
|
return $return;
|
|
}
|
|
|
|
/**
|
|
* Throw a PDO Exception based on the last PDO error.
|
|
*/
|
|
protected function throwPDOException() {
|
|
$error_info = $this->dbh->errorInfo();
|
|
// We rebuild a message formatted in the same way as PDO.
|
|
$exception = new PDOException("SQLSTATE[" . $error_info[0] . "]: General error " . $error_info[1] . ": " . $error_info[2]);
|
|
$exception->errorInfo = $error_info;
|
|
throw $exception;
|
|
}
|
|
|
|
/**
|
|
* Grab a PDOStatement object from a given query and its arguments.
|
|
*
|
|
* Some drivers (including SQLite) will need to perform some preparation
|
|
* themselves to get the statement right.
|
|
*
|
|
* @param $query
|
|
* The query.
|
|
* @param array $args
|
|
* An array of arguments.
|
|
* @return PDOStatement
|
|
* A PDOStatement object.
|
|
*/
|
|
protected function getStatement($query, &$args = array()) {
|
|
return $this->dbh->prepare($query);
|
|
}
|
|
|
|
/**
|
|
* Return the object's SQL query string.
|
|
*/
|
|
public function getQueryString() {
|
|
return $this->queryString;
|
|
}
|
|
|
|
/**
|
|
* @see PDOStatement::setFetchMode()
|
|
*/
|
|
public function setFetchMode($fetchStyle, $a2 = NULL, $a3 = NULL) {
|
|
$this->defaultFetchStyle = $fetchStyle;
|
|
switch ($fetchStyle) {
|
|
case PDO::FETCH_CLASS:
|
|
$this->defaultFetchOptions['class'] = $a2;
|
|
if ($a3) {
|
|
$this->defaultFetchOptions['constructor_args'] = $a3;
|
|
}
|
|
break;
|
|
case PDO::FETCH_COLUMN:
|
|
$this->defaultFetchOptions['column'] = $a2;
|
|
break;
|
|
case PDO::FETCH_INTO:
|
|
$this->defaultFetchOptions['object'] = $a2;
|
|
break;
|
|
}
|
|
|
|
// Set the values for the next fetch.
|
|
$this->fetchStyle = $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
}
|
|
|
|
/**
|
|
* Return the current row formatted according to the current fetch style.
|
|
*
|
|
* This is the core method of this class. It grabs the value at the current
|
|
* array position in $this->data and format it according to $this->fetchStyle
|
|
* and $this->fetchMode.
|
|
*
|
|
* @return
|
|
* The current row formatted as requested.
|
|
*/
|
|
public function current() {
|
|
if (isset($this->currentRow)) {
|
|
switch ($this->fetchStyle) {
|
|
case PDO::FETCH_ASSOC:
|
|
return $this->currentRow;
|
|
case PDO::FETCH_BOTH:
|
|
// PDO::FETCH_BOTH returns an array indexed by both the column name
|
|
// and the column number.
|
|
return $this->currentRow + array_values($this->currentRow);
|
|
case PDO::FETCH_NUM:
|
|
return array_values($this->currentRow);
|
|
case PDO::FETCH_LAZY:
|
|
// We do not do lazy as everything is fetched already. Fallback to
|
|
// PDO::FETCH_OBJ.
|
|
case PDO::FETCH_OBJ:
|
|
return (object) $this->currentRow;
|
|
case PDO::FETCH_CLASS | PDO::FETCH_CLASSTYPE:
|
|
$class_name = array_unshift($this->currentRow);
|
|
// Deliberate no break.
|
|
case PDO::FETCH_CLASS:
|
|
if (!isset($class_name)) {
|
|
$class_name = $this->fetchOptions['class'];
|
|
}
|
|
if (count($this->fetchOptions['constructor_args'])) {
|
|
$reflector = new ReflectionClass($class_name);
|
|
$result = $reflector->newInstanceArgs($this->fetchOptions['constructor_args']);
|
|
}
|
|
else {
|
|
$result = new $class_name();
|
|
}
|
|
foreach ($this->currentRow as $k => $v) {
|
|
$result->$k = $v;
|
|
}
|
|
return $result;
|
|
case PDO::FETCH_INTO:
|
|
foreach ($this->currentRow as $k => $v) {
|
|
$this->fetchOptions['object']->$k = $v;
|
|
}
|
|
return $this->fetchOptions['object'];
|
|
case PDO::FETCH_COLUMN:
|
|
if (isset($this->columnNames[$this->fetchOptions['column']])) {
|
|
return $this->currentRow[$k][$this->columnNames[$this->fetchOptions['column']]];
|
|
}
|
|
else {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Implementations of Iterator. */
|
|
|
|
public function key() {
|
|
return $this->currentKey;
|
|
}
|
|
|
|
public function rewind() {
|
|
// Nothing to do: our DatabaseStatement can't be rewound.
|
|
}
|
|
|
|
public function next() {
|
|
if (!empty($this->data)) {
|
|
$this->currentRow = reset($this->data);
|
|
$this->currentKey = key($this->data);
|
|
unset($this->data[$this->currentKey]);
|
|
}
|
|
else {
|
|
$this->currentRow = NULL;
|
|
}
|
|
}
|
|
|
|
public function valid() {
|
|
return isset($this->currentRow);
|
|
}
|
|
|
|
/* Implementations of DatabaseStatementInterface. */
|
|
|
|
public function rowCount() {
|
|
return $this->rowCount;
|
|
}
|
|
|
|
public function fetch($fetch_style = NULL, $cursor_orientation = PDO::FETCH_ORI_NEXT, $cursor_offset = NULL) {
|
|
if (isset($this->currentRow)) {
|
|
// Set the fetch parameter.
|
|
$this->fetchStyle = isset($fetch_style) ? $fetch_style : $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
|
|
// Grab the row in the format specified above.
|
|
$return = $this->current();
|
|
// Advance the cursor.
|
|
$this->next();
|
|
|
|
// Reset the fetch parameters to the value stored using setFetchMode().
|
|
$this->fetchStyle = $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
return $return;
|
|
}
|
|
else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
public function fetchColumn($index = 0) {
|
|
if (isset($this->currentRow) && isset($this->columnNames[$index])) {
|
|
// We grab the value directly from $this->data, and format it.
|
|
$return = $this->currentRow[$this->columnNames[$index]];
|
|
$this->next();
|
|
return $return;
|
|
}
|
|
else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
public function fetchField($index = 0) {
|
|
return $this->fetchColumn($index);
|
|
}
|
|
|
|
public function fetchObject($class_name = NULL, $constructor_args = array()) {
|
|
if (isset($this->currentRow)) {
|
|
if (!isset($class_name)) {
|
|
// Directly cast to an object to avoid a function call.
|
|
$result = (object) $this->currentRow;
|
|
}
|
|
else {
|
|
$this->fetchStyle = PDO::FETCH_CLASS;
|
|
$this->fetchOptions = array('constructor_args' => $constructor_args);
|
|
// Grab the row in the format specified above.
|
|
$result = $this->current();
|
|
// Reset the fetch parameters to the value stored using setFetchMode().
|
|
$this->fetchStyle = $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
}
|
|
|
|
$this->next();
|
|
|
|
return $result;
|
|
}
|
|
else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
public function fetchAssoc() {
|
|
if (isset($this->currentRow)) {
|
|
$result = $this->currentRow;
|
|
$this->next();
|
|
return $result;
|
|
}
|
|
else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
public function fetchAll($fetch_style = NULL, $fetch_column = NULL, $constructor_args = NULL) {
|
|
$this->fetchStyle = isset($fetch_style) ? $fetch_style : $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
if (isset($fetch_column)) {
|
|
$this->fetchOptions['column'] = $fetch_column;
|
|
}
|
|
if (isset($constructor_args)) {
|
|
$this->fetchOptions['constructor_args'] = $constructor_args;
|
|
}
|
|
|
|
$result = array();
|
|
// Traverse the array as PHP would have done.
|
|
while (isset($this->currentRow)) {
|
|
// Grab the row in the format specified above.
|
|
$result[] = $this->current();
|
|
$this->next();
|
|
}
|
|
|
|
// Reset the fetch parameters to the value stored using setFetchMode().
|
|
$this->fetchStyle = $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
return $result;
|
|
}
|
|
|
|
public function fetchCol($index = 0) {
|
|
if (isset($this->columnNames[$index])) {
|
|
$column = $this->columnNames[$index];
|
|
$result = array();
|
|
// Traverse the array as PHP would have done.
|
|
while (isset($this->currentRow)) {
|
|
$result[] = $this->currentRow[$this->columnNames[$index]];
|
|
$this->next();
|
|
}
|
|
return $result;
|
|
}
|
|
else {
|
|
return array();
|
|
}
|
|
}
|
|
|
|
public function fetchAllKeyed($key_index = 0, $value_index = 1) {
|
|
if (!isset($this->columnNames[$key_index]) || !isset($this->columnNames[$value_index]))
|
|
return array();
|
|
|
|
$key = $this->columnNames[$key_index];
|
|
$value = $this->columnNames[$value_index];
|
|
|
|
$result = array();
|
|
// Traverse the array as PHP would have done.
|
|
while (isset($this->currentRow)) {
|
|
$result[$this->currentRow[$key]] = $this->currentRow[$value];
|
|
$this->next();
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
public function fetchAllAssoc($key, $fetch_style = NULL) {
|
|
$this->fetchStyle = isset($fetch_style) ? $fetch_style : $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
|
|
$result = array();
|
|
// Traverse the array as PHP would have done.
|
|
while (isset($this->currentRow)) {
|
|
// Grab the row in its raw PDO::FETCH_ASSOC format.
|
|
$row = $this->currentRow;
|
|
// Grab the row in the format specified above.
|
|
$result_row = $this->current();
|
|
$result[$this->currentRow[$key]] = $result_row;
|
|
$this->next();
|
|
}
|
|
|
|
// Reset the fetch parameters to the value stored using setFetchMode().
|
|
$this->fetchStyle = $this->defaultFetchStyle;
|
|
$this->fetchOptions = $this->defaultFetchOptions;
|
|
return $result;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @} End of "addtogroup database".
|
|
*/
|
|
|