pgsql: Add batch mode, make new libpq section: < * Add a libpq function

Log Message:
-----------
Add batch mode, make new libpq section:

< * Add a libpq function to support Parse/DescribeStatement capability
< * Add PQescapeIdentifier() to libpq
< * Prevent PQfnumber() from lowercasing unquoted the column name
<
< PQfnumber() should never have been doing lowercasing, but historically
< it has so we need a way to prevent it
<
648a642,661
>
>
> libpq
>
> o Add a function to support Parse/DescribeStatement capability
> o Add PQescapeIdentifier()
> o Prevent PQfnumber() from lowercasing unquoted the column name
>
> PQfnumber() should never have been doing lowercasing, but
> historically it has so we need a way to prevent it
>
> o Allow query results to be automatically batched to the client
>
> Currently, all query results are transfered to the libpq
> client before libpq makes the results available to the
> application. This feature would allow the application to make
> use of the first result rows while the rest are transfered, or
> held on the server waiting for them to be requested by libpq.
> One complexity is that a query like SELECT 1/col could error
> out mid-way through the result set.

Modified Files:
--------------
pgsql/doc:
TODO (r1.1697 -> r1.1698)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1697&r2=1.1698)
pgsql/doc/src/FAQ:
TODO.html (r1.204 -> r1.205)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.204&r2=1.205)