Re: [patch] Proposal for \rotate in psql

Hi,

This is the 2nd iteration of this patch, for comments and review.

Changes:

- the arguments can be column names (rather than only numbers).

- the horizontal headers are sorted server-side according to their original
type. DESC order is possible by prefixing the column arg with a minus sign.

- the command is now modelled after \g so it can be used
in place of \g

- the title is no longer set by the command, it was getting in the
way when outputting to data file.

- there's a hard limit on 1600 columns. This is to fail early and clean
on large resultsets that are not amenable to being rotated.

- includes SGML user doc.

As I don't have plans for further improvements, I'll submit this one
to the open commitfest.

Best regards,
--
Daniel Vérité
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