public function remove($key, $column_name = null)
{
$timestamp = time();
$column_path = new cassandra_ColumnPath();
$column_path->column_family = $this->column_family;
if ($this->is_super) {
$column_path->super_column = $this->unparse_column_name($column_name, true);
} else {
$column_path->column = $this->unparse_column_name($column_name, false);
}
$client = CassandraConn::get_client();
$resp = $client->remove($this->keyspace, $key, $column_path, $timestamp, $this->write_consistency_level);
return $resp;
}
/**
* 清除指定colnames
* @param $key
* @param $super
* @param $colnames
* @return
*/
public function erase($key, $colnames, $sc_name = null)
{
$mu = new cassandra_Mutation();
$del = new cassandra_Deletion();
$slice = new cassandra_SlicePredicate();
$slice->column_names = array('name', 'time');
$del->predicate = $slice;
$del->super_column = $this->unparse_column_name($sc_name, $this->column_type);
$del->timestamp = CassandraUtil::get_time();
$mu->deletion = $del;
$mus[] = $mu;
$client = CassandraConn::get_client();
$mmap = array();
$mmap[$key][$this->column_family] = $mus;
$client->batch_mutate($this->keyspace, $mmap, $this->write_consistency_level);
}