Я создал класс, который выполняет многострочный текст, который используется следующим образом:
$pdo->beginTransaction();
$pmi = new PDOMultiLineInserter($pdo, "foo", array("a","b","c","e"), 10);
$pmi->insertRow($data);
// ....
$pmi->insertRow($data);
$pmi->purgeRemainingInserts();
$pdo->commit();
где класс определяется следующим образом:
class PDOMultiLineInserter {
private $_purgeAtCount;
private $_bigInsertQuery, $_singleInsertQuery;
private $_currentlyInsertingRows = array();
private $_currentlyInsertingCount = 0;
private $_numberOfFields;
private $_error;
private $_insertCount = 0;
/**
* Create a PDOMultiLine Insert object.
*
* @param PDO $pdo The PDO connection
* @param type $tableName The table name
* @param type $fieldsAsArray An array of the fields being inserted
* @param type $bigInsertCount How many rows to collect before performing an insert.
*/
function __construct(PDO $pdo, $tableName, $fieldsAsArray, $bigInsertCount = 100) {
$this->_numberOfFields = count($fieldsAsArray);
$insertIntoPortion = "REPLACE INTO `$tableName` (`".implode("`,`", $fieldsAsArray)."`) VALUES";
$questionMarks = " (?".str_repeat(",?", $this->_numberOfFields - 1).")";
$this->_purgeAtCount = $bigInsertCount;
$this->_bigInsertQuery = $pdo->prepare($insertIntoPortion.$questionMarks.str_repeat(", ".$questionMarks, $bigInsertCount - 1));
$this->_singleInsertQuery = $pdo->prepare($insertIntoPortion.$questionMarks);
}
function insertRow($rowData) {
// @todo Compare speed
// $this->_currentlyInsertingRows = array_merge($this->_currentlyInsertingRows, $rowData);
foreach($rowData as $v) array_push($this->_currentlyInsertingRows, $v);
//
if (++$this->_currentlyInsertingCount == $this->_purgeAtCount) {
if ($this->_bigInsertQuery->execute($this->_currentlyInsertingRows) === FALSE) {
$this->_error = "Failed to perform a multi-insert (after {$this->_insertCount} inserts), the following errors occurred:".implode('<br/>', $this->_bigInsertQuery->errorInfo());
return false;
}
$this->_insertCount++;
$this->_currentlyInsertingCount = 0;
$this->_currentlyInsertingRows = array();
}
return true;
}
function purgeRemainingInserts() {
while ($this->_currentlyInsertingCount > 0) {
$singleInsertData = array();
// @todo Compare speed - http://www.evardsson.com/blog/2010/02/05/comparing-php-array_shift-to-array_pop/
// for ($i = 0; $i < $this->_numberOfFields; $i++) $singleInsertData[] = array_pop($this->_currentlyInsertingRows); array_reverse($singleInsertData);
for ($i = 0; $i < $this->_numberOfFields; $i++) array_unshift($singleInsertData, array_pop($this->_currentlyInsertingRows));
if ($this->_singleInsertQuery->execute($singleInsertData) === FALSE) {
$this->_error = "Failed to perform a small-insert (whilst purging the remaining rows; the following errors occurred:".implode('<br/>', $this->_singleInsertQuery->errorInfo());
return false;
}
$this->_currentlyInsertingCount--;
}
}
public function getError() {
return $this->_error;
}
}