feat(postgres, sqlite): support where clause in 'on conflict do update set ... WHERE <condition>'

[DjellalAbdou]

Pull Request Checklist

• Have you added new tests to prevent regressions?
• If a documentation update is necessary, have you opened a PR to the documentation repository?
• Did you update the typescript typings accordingly (if applicable)?
• Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
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Description of Changes

• Added the option onConflictUpdateWhere to QueryGenerator.prototype.insertQuery and QueryGenerator.prototype.bulkInsertQuery. This option is used to generate the ON CONFLICT DO UPDATE SET... WHERE part of the query.

Example use case :

  await User.bulkCreate({ id: 'Abdou', score: '56', last_used_date: some_date }, {
    conflictAttributes: ['id'],
    updateOnDuplicate: ['score', 'last_used_date'],
    onConflictUpdateWhere: {
      last_used_date: { [Op.gte]: some_base_date },
    },
  });

Note: This option is only available for Postgres and SQLite

The resulting Query will be something like this :

INSERT INTO "Users" ("id", "score", "last_used_date") 
VALUES (DEFAULT, '33', '2024-02-29 17:43:48.530 +00:00'),
ON CONFLICT ("id") DO UPDATE SET 
	"score"=EXCLUDED."score",
	"last_used_date"=EXCLUDED."last_used_date" 
WHERE "Users"."last_used_date" <= (some_date_here)
RETURNING "id", "score", "last_used_date";

This feature was already discussed in this issue, Sequalize already has an opened PR treating the same issue but with a lot of conflicts to the current version of Sequelize.

[DjellalAbdou]

@WikiRik or @ephys can you take a look at this? I really need it 🙏