GORA-109: Pig Adapter for Gora
may-2018 under development
Apache Gora is an Object Datastore Mapper which has its own data model. At the same time, Apache Pig has its own data model too. Because of this, it is needed an adaptation between both data models.
The aim of this document is to analyze, determine and propose a suitable mapping between both data models.
Data models
Gora's data entities are generated from Apache Avro schemas, and inherits the same datatypes defined in Avro.
Pig has its own data model.
The following table shows the different types and a possible direct conversion from types to types.
| Gora | Pig | |
|---|---|---|
| Primitive/Simple types | null boolean int (32-bit) long (64-bit) float (32-bit) double (64-bit) bytes (8-bit) string (unicode) |
null boolean int (32-bit) long (64-bit) float (32-bit) double (64-bit) bytearray chararray (string UTF-8) datetime biginteger bigdecimal |
| Complex types | record enum array map union fixed |
tuple int bag map |