we do this in other adapters, and it's a nice speed improvement

AR: translate_exception_class() no longer logs error.

Spike on new transaction callbacks

Rely on through table name in has_many fixtures

[fixes #18903]

Add after_commit_without_transaction_enrollment and
after_rollback_without_transaction_enrollment private callbacks so we
can create after_commit and after_rollback callbacks without having the
records automatic enrolled in the transaction.

[fixes #18904]

Fixes #19057

Fix c4794806 to account for from_value -> from_clause in bdc51416

Fix appending table_name to select and group when used with subquery (fr...

Fix mysql's schema.rb dumper so it does not include limit on emulated booleans

activemodel: make .model_name json encodable

Previously, calling `User.model_name.to_json` would result in an infinite
recursion as `.model_name` inherited its `.as_json` behavior from Object. This
patch fixes that unexpected behavior by delegating `.as_json` to :name.

Deprecate `AbstractController::Callbacks#skip_action_callback`

[Toby Ovod-Everett & Andrey Nering & Yves Senn]

Closes #17726.
Closes #10939.

This patch makes three distinct modifications:

1. no longer fall back to disabling user triggers if system triggers can't be disabled
2. warn the user when referential integrity can't be disabled
3. restore aborted transactions when referential integrity can't be disabled

The motivation behind these changes is to make the behavior of Rails
transparent and less error-prone. To require superuser privileges is not optimal
but it's what Rails currently needs. Users who absolutely rely on disabling user triggers
can patch `disable_referential_integrity`.

We should investigate `SET CONSTRAINTS` as a possible solution which does not require
superuser privileges.

/cc @matthewd

Remove unused table

`postgresql_xml_data_type` table is used from nowhere.

Move back `new_column_definition` into `TableDefinition`

Only `primary_key` should be extracted by d47357e2 in #19030, but
`new_coclumn_definition` was also extracted because #17631 is merged
previously, then #19030 is auto merged without conflicts.

This commit is for move back `new_column_definition` into
`TableDefinition`.

As part of #19029, in future `skip_before_action`, `skip_after_action` and
`skip_around_action` will raise an ArgumentError if the specified
callback does not exist. `skip_action_callback` calls all three of these
methods and will almost certainly result in an ArgumentError. If anyone
wants to remove all three callbacks then they can still call the three
individual methods. Therefore let's deprecate `skip_action_callback` now
and remove it when #19029 is merged.

`ActiveJob::QueueAdapters::TestAdapter` is now a singleton

Extract the short-hand column methods into `ColumnMethods`

Since `ActiveJob::TestHelper` globally sets
`ActiveJob::Base.queue_adapter` on setup, there is no benefit in
instantiating a new `TestAdapter` per tests. The original rationale was
to allow parallel tests to run without interference, but since they'd
all mutate the global `ActiveJob::Base.queue_adapter`, that was never
realized.

Cleaning actionpack tests

Allow limit option for MySQL bigint primary key support.

Fix typo

I think this was supposed to be "roundTrip".

Example:

    create_table :foos, id: :primary_key, limit: 8 do |t|
    end

    # or

    create_table :foos, id: false do |t|
      t.column :id, limit: 8
    end

Improve generator name suggestions a bit.

[ci skip] Fix `Object-Relational` to `Object Relational`

Require `belongs_to` by default.