DynamoDB - Global Secondary Index on set items

Question

I have a dynamo table with the following attributes :

• id (Number - primary key )
• title (String)
• created_at (Number - long)
• tags (St

Answer 1

• DynamoDB is not designed to optimize indexing on set values. Below is a copy of the amazon's relevant documentation (from Improving Data Access with Secondary Indexes in DynamoDB).

The key schema for the index. Every attribute in the index key schema must be a top-level attribute of type String, Number, or Binary. Nested attributes and multi-valued sets are not allowed. Other requirements for the key schema depend on the type of index: For a global secondary index, the hash attribute can be any scalar table attribute. A range attribute is optional, and it too can be any scalar table attribute. For a local secondary index, the hash attribute must be the same as the table's hash attribute, and the range attribute must be a non-key table attribute.

• Amazon recommends creating a separate one-to-many table for these kind of problems. More info here : Use one to many tables