function Insert::execute

File

core/modules/pgsql/src/Driver/Database/pgsql/Insert.php, line 30

Class

Insert

PostgreSQL implementation of \Drupal\Core\Database\Query\Insert.

Namespace

Code

public function execute() {
  if (!$this->preExecute()) {
    return NULL;
  }
  $stmt = $this->connection
    ->prepareStatement((string) $this, $this->queryOptions);
  // Fetch the list of blobs and sequences used on that table.
  $table_information = $this->connection
    ->schema()
    ->queryTableInformation($this->table);
  $max_placeholder = 0;
  $blobs = [];
  $blob_count = 0;
  foreach ($this->insertValues as $insert_values) {
    foreach ($this->insertFields as $idx => $field) {
      if (isset($table_information->blob_fields[$field]) && $insert_values[$idx] !== NULL) {
        $blobs[$blob_count] = fopen('php://memory', 'a');
        fwrite($blobs[$blob_count], $insert_values[$idx]);
        rewind($blobs[$blob_count]);
        $stmt->getClientStatement()
          ->bindParam(':db_insert_placeholder_' . $max_placeholder++, $blobs[$blob_count], \PDO::PARAM_LOB);
        // Pre-increment is faster in PHP than increment.
        ++$blob_count;
      }
      else {
        $stmt->getClientStatement()
          ->bindParam(':db_insert_placeholder_' . $max_placeholder++, $insert_values[$idx]);
      }
    }
    // Check if values for a serial field has been passed.
    if (!empty($table_information->serial_fields)) {
      foreach ($table_information->serial_fields as $index => $serial_field) {
        $serial_key = array_search($serial_field, $this->insertFields);
        if ($serial_key !== FALSE) {
          $serial_value = $insert_values[$serial_key];
          // Sequences must be greater than or equal to 1.
          if ($serial_value === NULL || !$serial_value) {
            $serial_value = 1;
          }
          // Set the sequence to the bigger value of either the passed
          // value or the max value of the column. It can happen that another
          // thread calls nextval() which could lead to a serial number being
          // used twice. However, trying to insert a value into a serial
          // column should only be done in very rare cases and is not thread
          // safe by definition.
          $this->connection
            ->query("SELECT setval('" . $table_information->sequences[$index] . "', GREATEST(MAX(" . $serial_field . "), :serial_value)) FROM {" . $this->table . "}", [
            ':serial_value' => (int) $serial_value,
          ]);
        }
      }
    }
  }
  if (!empty($this->fromQuery)) {
    // bindParam stores only a reference to the variable that is followed when
    // the statement is executed. We pass $arguments[$key] instead of $value
    // because the second argument to bindParam is passed by reference and
    // the foreach statement assigns the element to the existing reference.
    $arguments = $this->fromQuery
      ->getArguments();
    foreach ($arguments as $key => $value) {
      $stmt->getClientStatement()
        ->bindParam($key, $arguments[$key]);
    }
  }
  // Create a savepoint so we can rollback a failed query. This is so we can
  // mimic MySQL and SQLite transactions which don't fail if a single query
  // fails. This is important for tables that are created on demand. For
  // example, \Drupal\Core\Cache\DatabaseBackend.
  $this->connection
    ->addSavepoint();
  try {
    $stmt->execute(NULL, $this->queryOptions);
    if (isset($table_information->serial_fields[0])) {
      $last_insert_id = $stmt->fetchField();
    }
    $this->connection
      ->releaseSavepoint();
  } catch (\Exception $e) {
    $this->connection
      ->rollbackSavepoint();
    $this->connection
      ->exceptionHandler()
      ->handleExecutionException($e, $stmt, [], $this->queryOptions);
  }
  // Re-initialize the values array so that we can re-use this query.
  $this->insertValues = [];
  return $last_insert_id ?? NULL;
}