pgsql: GIN support for @@ and @? jsonpath operators

GIN support for @@ and @? jsonpath operators

This commit makes existing GIN operator classes jsonb_ops and json_path_ops
support "jsonb @@ jsonpath" and "jsonb @? jsonpath" operators. Basic idea is
to extract statements of following form out of jsonpath.

key1.key2. ... .keyN = const

The rest of jsonpath is rechecked from heap.

Catversion is bumped.

Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com
Author: Nikita Glukhov, Alexander Korotkov
Reviewed-by: Jonathan Katz, Pavel Stehule

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/0a02e2ae0236103e641f6570b8135b7ee8a83686

Modified Files
--------------
doc/src/sgml/gin.sgml | 4 +
doc/src/sgml/json.sgml | 19 +-
src/backend/utils/adt/jsonb_gin.c | 948 ++++++++++++++++++++++++++++---
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_amop.dat | 12 +
src/include/utils/jsonb.h | 3 +
src/include/utils/jsonpath.h | 2 +
src/test/regress/expected/jsonb.out | 453 +++++++++++++++
src/test/regress/expected/opr_sanity.out | 4 +-
src/test/regress/sql/jsonb.sql | 79 +++
src/tools/pgindent/typedefs.list | 8 +
11 files changed, 1456 insertions(+), 78 deletions(-)