| Name | Description | Type | Package | Framework |
| Reader | The interface for reading ORC files. | Interface | org.apache.hadoop.hive.ql.io.orc | Apache Hive |
| Reader .Options | Options for creating a RecordReader. | Class | org.apache.hadoop.hive.ql.io.orc.Reader | Apache Hive |
| ReaderImpl | Class | org.apache.hadoop.hive.ql.io.orc | Apache Hive | |