public function streamExecuteKeyRanges(Context $ctx, $query, $keyspace, array $key_ranges, array $bind_vars, $tablet_type)
{
$request = new Proto\Vtgate\StreamExecuteKeyRangesRequest();
$request->setQuery(ProtoUtils::BoundQuery($query, $bind_vars));
$request->setKeyspace($keyspace);
ProtoUtils::addKeyRanges($request, $key_ranges);
$request->setTabletType($tablet_type);
if ($ctx->getCallerId()) {
$request->setCallerId($ctx->getCallerId());
}
$call = $this->client->streamExecuteKeyRanges($ctx, $request);
return new StreamCursor($call);
}