Where to implement reserved keyword check? cds-dbm or cds-pg

[gregorwolf]

In #179 this issue was identified:

But 'user' turns out to be a reserved keyword in Postgresql.
https://www.postgresql.org/docs/current/sql-keywords-appendix.html
Might be an idea to scan for those and give a warning ?

the question is where do we implement this? in cds-dbm or cds-pg.

[gregorwolf]

What do you think @vobu?

[vobu]

I'd vote for both:

• in cds-pg when serving any .cds that contains user as an entity
• in cds-dbm at deploy-time

[sedacrivity]

Great. It could also be nice to include a warning on the combined length of a table / view exceeding the hard limit of 63 characters. See #180