pgsql: Add some UUID support functions

Add some UUID support functions

Add uuid_extract_timestamp() and uuid_extract_version().

Author: Andrey Borodin
Reviewed-by: Sergey Prokhorenko, Kirk Wolak, Przemysław Sztoch
Reviewed-by: Nikolay Samokhvalov, Jelte Fennema-Nio, Aleksander Alekseev
Reviewed-by: Peter Eisentraut, Chris Travers, Lukas Fittl
Discussion: /messages/by-id/CAAhFRxitJv=yoGnXUgeLB_O+M7J2BJAmb5jqAT9gZ3bij3uLDA@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/794f10f6b920670cb9750b043a2b2587059d5051

Modified Files
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doc/src/sgml/func.sgml | 30 +++++++++++++++
src/backend/utils/adt/uuid.c | 64 ++++++++++++++++++++++++++++++++
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_proc.dat | 7 ++++
src/test/regress/expected/opr_sanity.out | 2 +
src/test/regress/expected/uuid.out | 39 +++++++++++++++++++
src/test/regress/sql/uuid.sql | 14 +++++++
7 files changed, 157 insertions(+), 1 deletion(-)