Question: Can DynamoDB table have adhoc attributes?

Answer

DynamoDB tables can have ad-hoc attributes, which are non-schema-bound or schema-less attributes. In DynamoDB, each item in a table is a collection of one or more key-value pairs.

DynamoDB does not enforce a fixed schema on the attributes of an item, which means that an item can have any number of attributes, and each item can have a different set of attributes. This allows you to add new attributes to items without changing the table's schema, making it more flexible and easier to adapt to changing data requirements.

However, it's important to keep in mind that the total size of an item, including all of its attributes, must not exceed 400 KB. Also, when you create a secondary index, you need to specify the attributes that will be projected into the index, meaning that only the specified attributes will be available for querying the index.