queryInterface.bulkInsert behaviour in SQLite / MySQL / PostreSQL is different

What are you doing?

        const battlefield = await queryInterface.bulkInsert(
            'battlefields',
            [
                {
                    owner: user1,
                    game,
                },
                {
                    owner: user2,
                    game
                },
            ],
            {}
        );

if you execute it against MySQL it will return 1st created ID. e.g 1 if you execute it against SQLite it will return last created ID. e.g 2

To Reproduce git clone from this branch/PR https://github.com/eugene-matvejev/node-js-battleship/pull/1 commit hash: 0452f13828a4223c1dcea87c7d6004fb4ae20b77

MySQL:
$ npm i
setup your mysql with root/password as credentials
$ npm run sequlize db:create
$ npm run sequlize db:migrate
$ npm run sequlize db:seed:all

observe in console logs:
== 20190708135942-example-game: migrating =======
{ battlefield: 1 }
== 20190708135942-example-game: migrated (0.015s)

SQLite:
$ npm i
$ npm test
observe in console logs:
      Executing (default): INSERT INTO `battlefields` (`owner`,`game`) VALUES (3,1),(4,1);
    console.log undefined:45
      { battlefield: 2 }

What do you expect to happen?

id should be last or/and first for every dialect

What is actually happening?

one got last insert, another got first insert

Output, either JSON or SQL

Environment

Sequelize CLI [Node: 10.16.0, CLI: 5.5.0, ORM: 5.8.12] Dialect:

• [ x ] mysql
• postgres
• [ x ] sqlite
• mssql
• any Dialect library version: 5.8.12 Database version: 5.7.26 Sequelize version: 5.8.12 Node Version: 10.16.0 OS: MacBook If TypeScript related: TypeScript version: XXX Tested with latest release:
• [ x ] No
• Yes, specify that version:

[eugene-matvejev]

id should be last or/and first for every dialect

Is this stated in the docs somewhere? (Just asking to label this correctly, depending on the response it’s bug/feature. Thanks!)

I haven’t found any docs which would state such behaviour, except docs for posgreSQL where it got option ‘returning’

[github-actions[bot]]

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