feat: support disable dialect's feature

[j2gg0s]

Issue: #1045

[vmihailenco]

I'd say this should be done one the dialect level, e.g.:

myDialect := pgdialect.New(pgdialect.WithoutFeature(...))

And then the db will just use the features from the dialect:

db := bun.NewDB(sqldb, myDialect)

[j2gg0s]

@vmihailenco

Can we support both levels? Dialect and DB
I don’t think we should assume which level the user should use.

[j2gg0s]

@vmihailenco

Can we support both levels? Dialect and DB I don’t think we should assume which level the user should use.

And i dont want to add method for every dialect.

[vmihailenco]

The problem with your current approach is that now we have bun.DB with one set of features and dialect with another set features. It might be that we currently don't use dialect.features anywhere, but it will probably create a problem in the long term.

And i dont want to add method for every dialect.

We can try to create BaseDialect and extract this functionality to the dialect package, but TBH it looks easier to just copy/paste 2 simple methods in each package.

[j2gg0s]

@vmihailenco

Let use remove DB.features, and use only the dialect?

[vmihailenco]

Looks good 👍

I still think that options should be named WithFeature and WithoutFeature, not AddFeature and RemoveFeature, but no biggie.