pgsql: Extend COPY to support COPY (SELECT ...) TO ...

Log Message:
-----------
Extend COPY to support COPY (SELECT ...) TO ...

Bernd Helmle

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        copy.sgml (r1.74 -> r1.75)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/copy.sgml.diff?r1=1.74&r2=1.75)
        psql-ref.sgml (r1.167 -> r1.168)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml.diff?r1=1.167&r2=1.168)
    pgsql/src/backend/commands:
        copy.c (r1.268 -> r1.269)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/copy.c.diff?r1=1.268&r2=1.269)
    pgsql/src/backend/nodes:
        copyfuncs.c (r1.349 -> r1.350)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/copyfuncs.c.diff?r1=1.349&r2=1.350)
        equalfuncs.c (r1.283 -> r1.284)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/equalfuncs.c.diff?r1=1.283&r2=1.284)
    pgsql/src/backend/parser:
        analyze.c (r1.348 -> r1.349)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/analyze.c.diff?r1=1.348&r2=1.349)
        gram.y (r2.558 -> r2.559)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/gram.y.diff?r1=2.558&r2=2.559)
    pgsql/src/backend/tcop:
        dest.c (r1.69 -> r1.70)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/dest.c.diff?r1=1.69&r2=1.70)
    pgsql/src/bin/psql:
        copy.c (r1.67 -> r1.68)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/copy.c.diff?r1=1.67&r2=1.68)
    pgsql/src/include/commands:
        copy.h (r1.27 -> r1.28)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/copy.h.diff?r1=1.27&r2=1.28)
    pgsql/src/include/nodes:
        parsenodes.h (r1.325 -> r1.326)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/parsenodes.h.diff?r1=1.325&r2=1.326)
    pgsql/src/include/tcop:
        dest.h (r1.51 -> r1.52)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/tcop/dest.h.diff?r1=1.51&r2=1.52)
    pgsql/src/test/regress:
        parallel_schedule (r1.34 -> r1.35)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/parallel_schedule.diff?r1=1.34&r2=1.35)
        serial_schedule (r1.32 -> r1.33)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/serial_schedule.diff?r1=1.32&r2=1.33)

Added Files:
-----------
    pgsql/src/test/regress/expected:
        copyselect.out (r1.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/copyselect.out?rev=1.1&content-type=text/x-cvsweb-markup)
    pgsql/src/test/regress/sql:
        copyselect.sql (r1.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/copyselect.sql?rev=1.1&content-type=text/x-cvsweb-markup)