Re: Why do we let CREATE DATABASE reassign encoding?

Tom Lane wrote:
> If I have locale set to C, I can do this:
>
> regression=# create database u8 encoding 'utf8';
> CREATE DATABASE
> regression=# create database l1 encoding 'latin1' template u8;
> CREATE DATABASE
>
> Had I had any actual utf8 data in u8, l1 would now contain
> encoding-corrupt information. Given that we've tried to
> clamp down on encoding violations in recent releases, I wonder
> why this case is still allowed.
>
> (In non-C locales, this will typically fail because the two
> different encodings can't both match the locale. But I don't
> believe it's our policy to enforce encoding validity only for
> non-C locales.)
>
> We should presumably let the encoding be changed when cloning
> from template0, and probably it's reasonable to trust the user
> if either source or destination DB encoding is SQL_ASCII.
> In other cases I'm thinking it should fail.
>
>
>

Really? You want to forbid selecting an encoding when the source is
template1, which is the default, and template1 is not SQL_ASCII? So the
following sequence woiuld be illegal:

initdb -E latin1
createdb -E utf8

I think we have a bit more thinking to do on this - I don't have a
reasonable solution immediately in my head.

cheers

andrew