Re: [PATCH] Make various variables read-only (const)

Oskari Saarenmaa <os(at)ohmu(dot)fi> writes:
> This allows the variables to be moved from .data to .rodata section which
> means that more data can be shared by processes and makes sure that nothing
> can accidentally overwrite the read-only definitions. On a x86-64 Linux
> system this moves roughly 9 kilobytes of previously writable data to the
> read-only data segment in the backend and 4 kilobytes in libpq.

Committed, with the changes mentioned upthread and some other minor
editorialization. I also adopted Wim Lewis' suggestion to not export
pg_encname_tbl[] at all anymore, since it's hard to see what the point
is of doing anything besides pg_char_to_encoding() with it.

regards, tom lane