/**
*
* @return \ClickHouseDB\Statement
*/
public function insert()
{
$read_stream = $this->read;
$this->insert->header('Transfer-Encoding', 'chunked');
$this->insert->setReadFunction(function ($ch, $fd, $length) use($read_stream) {
$d = fread($read_stream, $length);
return $d ? $d : "";
});
$this->insert->setCallbackFunction(function (\Curler\Request $request) use($read_stream) {
fclose($read_stream);
});
$this->roll->addQueLoop($this->insert);
$this->roll->execLoopWait();
$state = new \ClickHouseDB\Statement($this->insert);
$state->error();
return $state;
}