Implement PredictionUDF using api-endpoint

[tkilias]

Background

• The extension only gets useful with prediction from Exasol
• Question:
  1. Do we create UDF per Model, TrainingJob (preferred)
     • possible to hard code model specific things, like model connection object name
     • the connection object can be changed without changing the UDF
     • you can do proper typing -> proper types Input and output variables
  2. use generic UDF, where you variadic parameters
• Option 1. requires a Luascript which create the UDF, connection object and the api endpoint
• How to shut down and resume endpoint?

[umitbuyuksahin]

Reads connection object

• if "Not running" then Error("Endpoint not running")
• else send data for prediction