getting index type

[Bobako]

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Pull request type

Please check the type of change your PR introduces:

• [ ] Bugfix
• [x] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

What is the current behavior?

Метод session.describe_table возвращает в том числе объекты, описывающие индексы таблицы - TableIndex. Этот объект не содержит информации о типе индекса (синхронный или асинхронный), хотя эта информация есть в protobuf сообщении, на основе которого формируется объект.

Issue Number: #351

What is the new behavior?

TableIndex содержать поле type - enum, описывающий тип индекса.

[Valeria1235]

Привет! Спасибо за патч. Можешь, пожалуйста, ещё тестом это покрыть?)

[LuckySting]

@Valeria1235, Hi! I tried to use the same approach, but I get nither global_async_index nor global_index from the describe_table, it seems like the server doesn't set this "oneof" field at all. Could you check it, please

[Valeria1235]

@Valeria1235, Hi! I tried to use the same approach, but I get nither global_async_index nor global_index from the describe_table, it seems like the server doesn't set this "oneof" field at all. Could you check it, please

Hi! I was just only reviewed this patch and as you can see there are no one tests cases. So perhaps it's no longer working or relevant.