pgsql: Allow CREATE OR REPLACE VIEW to add columns to the _end_ of the

Log Message:
-----------
Allow CREATE OR REPLACE VIEW to add columns to the _end_ of the view.

Robert Haas

Modified Files:
--------------
pgsql/doc/src/sgml/ref:
create_view.sgml (r1.37 -> r1.38)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_view.sgml?r1=1.37&r2=1.38)
pgsql/src/backend/commands:
tablecmds.c (r1.271 -> r1.272)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c?r1=1.271&r2=1.272)
view.c (r1.107 -> r1.108)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/view.c?r1=1.107&r2=1.108)
pgsql/src/backend/parser:
parse_utilcmd.c (r2.17 -> r2.18)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_utilcmd.c?r1=2.17&r2=2.18)
pgsql/src/include/nodes:
parsenodes.h (r1.381 -> r1.382)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/parsenodes.h?r1=1.381&r2=1.382)
pgsql/src/test/regress/expected:
create_view.out (r1.13 -> r1.14)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/create_view.out?r1=1.13&r2=1.14)
pgsql/src/test/regress/sql:
create_view.sql (r1.7 -> r1.8)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/create_view.sql?r1=1.7&r2=1.8)