pgsql: Add geometry/range functions to support BRIN inclusion

Add geometry/range functions to support BRIN inclusion

This commit adds the following functions:
    box(point) -> box
    bound_box(box, box) -> box
    inet_same_family(inet, inet) -> bool
    inet_merge(inet, inet) -> cidr
    range_merge(anyrange, anyrange) -> anyrange

The first of these is also used to implement a new assignment cast from
point to box.

These functions are the first part of a base to implement an "inclusion"
operator class for BRIN, for multidimensional data types.

Author: Emre Hasegeli
Reviewed by: Andreas Karlsson

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/3b6db1f445e14bd189ebc99ce1e5535a1c624613

Modified Files
--------------
doc/src/sgml/func.sgml                   |   47 ++++++++++++++++++++++++++
src/backend/utils/adt/geo_ops.c          |   39 +++++++++++++++++++++
src/backend/utils/adt/network.c          |   52 ++++++++++++++++++++++++++++
src/backend/utils/adt/rangetypes.c       |   54 +++++++++++++++++++++++-------
src/include/catalog/catversion.h         |    2 +-
src/include/catalog/pg_cast.h            |    1 +
src/include/catalog/pg_proc.h            |   10 ++++++
src/include/utils/builtins.h             |    2 ++
src/include/utils/geo_decls.h            |    2 ++
src/include/utils/rangetypes.h           |    1 +
src/test/regress/expected/geometry.out   |   34 +++++++++++++++++++
src/test/regress/expected/geometry_1.out |   34 +++++++++++++++++++
src/test/regress/expected/geometry_2.out |   34 +++++++++++++++++++
src/test/regress/expected/inet.out       |   28 ++++++++++++++++
src/test/regress/expected/rangetypes.out |   20 ++++++++++-
src/test/regress/sql/geometry.sql        |    6 ++++
src/test/regress/sql/inet.sql            |    7 ++++
src/test/regress/sql/rangetypes.sql      |    6 +++-
18 files changed, 363 insertions(+), 16 deletions(-)