Rails 7 adds ActiveRecord::Relation#structurally_compatible? to provide an easy way to check if two relations are structurally compatible before running `or` or `and` query on it.
ECMAScript 2021 introduces the replaceAll() method to replace all occurrences of a substring in a string with another string and numeric separators to allow a separator character between digits.
Rails 7 remove_columns will now trigger a single SQL statement to remove all columns if the database supports it, instead of querying multiple SQL statements for removing individual columns.
Pass `:unlimited` symbol to `attempts` parameter of ActiveJob's `retry_on` method, which allows a developer to specify that a job should retry forever until it succeeds.
