Re: [HACKERS] pgbench - allow to store select results into variables

Here is a v11.

It is basically a simple rebase after Tom committed the "pgbench -M order" patch. It interfered because the compound command management also needs
to delay part of the SQL command initialization. Some patch are luckier than others:-)

Here is a v10:

- does not talk about ASCII variable name constraint, as a patch has been
  submitted independently to lift this constraint.

- rename gcset to cset (compound set, \; + \set), where gset is ; + \set,
  because "\gcset" looked really strange.

- simplify the code a little bit.

Also attached is an updated test script.

--
Fabien.