Add binary column default value support to sqlite

[HParker]

This adds support for reading binary column default values before the column data is read from the database.
This makes binary columns behave more like other column types with default values.

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", path: "../code/rails"
  gem "sqlite3"
end

require "active_record"
require "minitest/autorun"
require "logger"

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts, force: true do |t|
    t.text :some_text, null: false, default: "hello-world"
    t.binary :some_binary, null: false, limit: 1024, default: "hello-world"
  end
end

class Post < ActiveRecord::Base
end

class BugTest < Minitest::Test
  def test_association_stuff

    post = Post.create!

    assert_equal "hello-world", post.some_binary # this passes after this change

    reloaded_post = Post.first
    assert_equal "hello-world", reloaded_post.some_binary # This passes before and after this change
  end
end

similar to #45832, but for sqlite.

[byroot]

But I'm confused on what the intended behavior for string type is.

Not sure what you mean here. Same as default value for other DBs. If you create a record without giving a value for that column, it should be set as the default value.

[swaathi]

Yes! My bad. Please ignore my comment!