A struct that represents the result of a query that modifies the schema.

This struct has the following fields:

• :effect - the type of change involved. It’s one of "CREATED", "UPDATED", or "DROPPED".

• :target - what has been modified. It’s one of "KEYSPACE", "TABLE", or "TYPE".

• :options - a map of options that depends on the value of :target:

  • if target is "KEYSPACE", the map will have the form %{keyspace: keyspace}
  • if the target is "TABLE" or "TYPE", the map will have the form %{keyspace: keyspace, subject: subject} where keyspace is the keyspace where the change happened and subject is the name of what changed (so the name of the changed table or type)