Issue #3346898 by mondrake, alexpott: Remove obsolete code from...

      }

    }

    // In some weird cases, 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.

    $rename_columns = [];

    foreach ($this->columnNames as $k => $column) {

      // In some SQLite versions, SELECT DISTINCT(field) will return "(field)"

      // instead of "field".

      if (preg_match("/^\((.*)\)$/", $column, $matches)) {

        $rename_columns[$column] = $matches[1];

        $this->columnNames[$k] = $matches[1];

        $column = $matches[1];

      }

      // Remove "table." prefixes.

      if (preg_match("/^.*\.(.*)$/", $column, $matches)) {

        $rename_columns[$column] = $matches[1];

        $this->columnNames[$k] = $matches[1];

      }

    }

    if ($rename_columns) {

      // DatabaseStatementPrefetch already extracted the first row,

      // put it back into the result set.

      if (isset($this->currentRow)) {

        $this->data[0] = &$this->currentRow;

      }

      // Then rename all the columns across the result set.

      foreach ($this->data as $k => $row) {

        foreach ($rename_columns as $old_column => $new_column) {

          $this->data[$k][$new_column] = $this->data[$k][$old_column];

          unset($this->data[$k][$old_column]);

        }

      }

      // Finally, extract the first row again.

      $this->currentRow = $this->data[0];

      unset($this->data[0]);

    }

    return $return;

  }