Apache Atlas Types System V2

[#1]

1. Going through the Atlas Technical user guide I see the attribute isComposite, which I do not see in any of the new model definitions for V2. Is this attribute still valid? how can this be specified in v2?
2. I also see that constraints are defined in the Hive mode such as : ownedRef, mappedFromRef,foriegnKey, OnDelete. Where can I get the complete list of constraints and their meaning.
3. What is the relationship for? I see that Hive table refers to array of columns as its attributes and vice versa. and then there is a relationship also defined called hive_table_columns. what additional benefit does creating the relation provide?
4. How to create entities when handling compositions? If the table is composed of columns, will i define columns within the table creation request? An example creation of hive table and column (entities for V2) would be of great help. Thanks

@Ashutosh Mestry

[#2]

thank you @Ashutosh Mestry for such a detailed response. Helps alot! Unfortunately the hive entities are not created. I copied your hive table entities JSON in POSTMAN and i get the following error:

{
    "errorCode": "ATLAS-404-00-00A",
    "errorMessage": "Referenced entity 027a987e-867a-4c98-ac1e-c5ded41130d3 is not found"
}
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[#3]

I copied the JSON contents from the create-hive-table-entity.txt to a file entity-create.json. Now I had to make a change to it so that the hive_db guid present in it had to be replaced with a guid of an already existing database. I replaced 90a7d3af-873a-4c10-a815-069f2d47d490 with 53ce4850-803e-457f-9f41-dfd01a761d9c.

I used this CURL command:

curl -k -X POST -u admin:admin -H "Content-Type: application/json" -H "Cache-Control: no-cache"  "https://localhost:21443/api/atlas/v2/entity" -d @../docs/entity-create.json

I was able to create the entities.

Note that my instance of Atlas has SSL enabled.

Can you please attempt this and let me know the results.

[#4]

Hi @Ashutosh Mestry I was using the json you provided in the Zip file. I tried the other file which works fine. The zip file is probably the response once the entities are created. Thanks

[#5]

That is correct. The ZIP file has the output and the TXT is the input.