pgsql: Add json(b)_to_tsvector function

Add json(b)_to_tsvector function

Jsonb has a complex nature so there isn't best-for-everything way to convert it
to tsvector for full text search. Current to_tsvector(json(b)) suggests to
convert only string values, but it's possible to index keys, numerics and even
booleans value. To solve that json(b)_to_tsvector has a second required
argument contained a list of desired types of json fields. Second argument is
a jsonb scalar or array right now with possibility to add new options in a
future.

Bump catalog version

Author: Dmitry Dolgov with some editorization by me
Reviewed by: Teodor Sigaev
Discussion: https://www.postgresql.org/message-id/CA+q6zcXJQbS1b4kJ_HeAOoOc=unfnOrUEL=KGgE32QKDww7d8g@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/1c1791e00065f6986f9d44a78ce7c28b2d1322dd

Modified Files
--------------
doc/src/sgml/func.sgml | 20 ++++
src/backend/tsearch/to_tsany.c | 128 ++++++++++++++++++++++----
src/backend/utils/adt/jsonfuncs.c | 179 ++++++++++++++++++++++++++++++++----
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_proc.h | 24 +++--
src/include/utils/jsonapi.h | 21 ++++-
src/test/regress/expected/json.out | 122 ++++++++++++++++++++++++
src/test/regress/expected/jsonb.out | 122 ++++++++++++++++++++++++
src/test/regress/sql/json.sql | 30 ++++++
src/test/regress/sql/jsonb.sql | 30 ++++++
10 files changed, 629 insertions(+), 49 deletions(-)