Redshift escape string literal logic.

[zdenal]

Why

We want to be able accept in regexp escaped string literals.

[lustefaniak]

Looks good but did you verify escape rules with the docs? I'm a little bit surprised it doesn't behave in same way as Postgres as normally you connect to resist using Postgres driver 🤔

[zdenal]

@lustefaniak TBH I didn't find doc about escaping sequences for redshift. If you have some could you provide a link please 🙏 .

But I couldn't do it like Postgresql as Postgresql doesn't have escaping behaviour in source code. Also I am not sure how similar are these 2 languages are. Postgresql has escaping singliquote by '' where redshift by example you provided has \' (and also by some others I found).
They are mentioning Postgres vs Mysql difference also in origin PR to Mysql escaping (apache#373 (comment)), so I think it doesn't need to be same as for redshift also.

Also by checking dialects (postgres and reshift) in source code they are kind of different related to identifiers logic and so on (what is also related with qouting logic).