How does apache atlas version entity metadata?

bryancjacobs — Thu, 18 Jan 2018 01:41:30 GMT

Here is an apache atlas hive column entity:

{
  "referredEntities": {
    
  },
  "entity": {
    "typeName": "hive_column",
    "attributes": {
      "owner": null,
      "qualifiedName": "make",
      "name": "make",
      "description": null,
      "comment": null,
      "position": 0,
      "type": "make",
      "table": {
        "guid": "03fca616-ee26-4273-bf73-afb10fd1127c",
        "typeName": "hive_table"
      }
    },
    "guid": "d4ef03da-4659-4001-9597-02649a24e30b",
    "status": "ACTIVE",
    "createdBy": "admin",
    "updatedBy": "admin",
    "createTime": 1516120300604,
    "updateTime": 1516132015809,
    "version": 0,
    "classifications": [
      
    ]
  }
}

The above JSON contains a version property which has the value of 0.

I have changed the name property, qualifiedName property in the UI but the version value has remained 0.

Can someone explain what causes that value to change and explain how versioning works in Apache Atlas?

Re: How does apache atlas version entity metadata?

amestry — Thu, 08 Feb 2018 08:38:15 GMT

(@Sarath Subramanian Thanks for your help on this!)

Version number is primarily used for patch updates to existing data types.
On master, note the patches directory under addons/models/1000-Hadoop/patches

AtlasTypeDefSoreInitializer.loadBootstrapTypeDefs (repository/store/bootstrap/AtlasTypeDefStoreInitializer.java) scans this directory and updates type definitions based on the version.

In short, it is used for maintenance of types.

Beyond this, version is NOT used internally for validation, etc.

question How does apache atlas version entity metadata? in Support Questions

How does apache atlas version entity metadata?

Re: How does apache atlas version entity metadata?