sqlite3

Currently we only support Upsert for CockroachDB. Implementing same for MySQL should be pretty straightforward as well.

Wonder if we can also use INSERT ON CONFLICT UPDATE for PostgreSQL to ensure operation with same signature also works.

Is your feature request related to a problem? Please describe.
I want to be able to find a single random child from a parent. In my app there are "Deck" and "Card" entities, and I want to be able to choose a random card from a deck.

Describe the solution you'd like
I'd like to be able to do something like so:

let card = await em.findOne(
    Card,
    { deck: "my_dec

1. First question:
   Comparing to go-pg migration tool we've lost ability to use set_version for some edge cases (semi-automatic-hardcoded
   migrations). I guess it happens due the nature of new way of migrations naming (it is based on timestamp layout 20060102150405 now - [ref code](https:/

Describe the bug
Character greater then > breaks comment in formatter

To Reproduce
Steps to reproduce the behavior:

1. Go to https://vscode-sqltools.mteixeira.dev/playground/formatter
2. Click on insert into below text:
   -- comments are
   -- breaks by sign greater than >
   -- unfortunately
3. See error

Expected behavior
the comment should not be affected by a character grea