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Alexander Korotkov bffe1bd684 Implement jsonpath .datetime() method 
This commit implements jsonpath .datetime() method as it's specified in
SQL/JSON standard.  There are no-argument and single-argument versions of
this method.  No-argument version selects first of ISO datetime formats
matching input string.  Single-argument version accepts template string as
its argument.

Additionally to .datetime() method itself this commit also implements
comparison ability of resulting date and time values.  There is some difficulty
because exising jsonb_path_*() functions are immutable, while comparison of
timezoned and non-timezoned types involves current timezone.  At first, current
timezone could be changes in session.  Moreover, timezones themselves are not
immutable and could be updated.  This is why we let existing immutable functions
throw errors on such non-immutable comparison.  In the same time this commit
provides jsonb_path_*_tz() functions which are stable and support operations
involving timezones.  As new functions are added to the system catalog,
catversion is bumped.

Support of .datetime() method was the only blocker prevents T832 from being
marked as supported.  sql_features.txt is updated correspondingly.

Extracted from original patch by Nikita Glukhov, Teodor Sigaev, Oleg Bartunov.
Heavily revised by me.  Comments were adjusted by Liudmila Mantrova.

Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com
Discussion: https://postgr.es/m/CAPpHfdsZgYEra_PeCLGNoXOWYx6iU-S3wF8aX0ObQUcZU%2B4XTw%40mail.gmail.com
Author: Alexander Korotkov, Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Liudmila Mantrova
Reviewed-by: Anastasia Lubennikova, Peter Eisentraut
2019-09-25 22:51:51 +03:00
..
.gitignore Replace our traditional initial-catalog-data format with a better design. 2018-04-08 13:17:27 -04:00
binary_upgrade.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
catalog.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
catversion.h Implement jsonpath .datetime() method 2019-09-25 22:51:51 +03:00
dependency.h Install dependencies to prevent dropping partition key columns. 2019-07-22 14:55:40 -04:00
duplicate_oids Update copyright for 2019 2019-01-02 12:44:25 -05:00
genbki.h Move the built-in conversions into the initial catalog data. 2019-01-03 19:47:53 -05:00
heap.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
index.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
indexing.h Rework the pg_statistic_ext catalog 2019-06-16 01:20:31 +02:00
Makefile Minor improvements for reformat_dat_file.pl. 2019-03-08 11:48:49 -05:00
namespace.h Fix inconsistencies and typos in the tree, take 10 2019-08-13 13:53:41 +09:00
objectaccess.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
objectaddress.h Don't include utils/array.h from acl.h. 2019-08-16 10:33:30 -07:00
opfam_internal.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
partition.h Fix more typos and inconsistencies in the tree 2019-06-17 16:13:16 +09:00
pg_aggregate.dat Add min() and max() aggregates for pg_lsn 2019-07-05 12:21:11 +09:00
pg_aggregate.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_am.dat tableam: introduce table AM infrastructure. 2019-03-06 09:54:38 -08:00
pg_am.h tableam: introduce table AM infrastructure. 2019-03-06 09:54:38 -08:00
pg_amop.dat Add support for <-> (box, point) operator to SP-GiST box_ops 2019-07-14 15:09:23 +03:00
pg_amop.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_amproc.dat Add sort support routine for the inet data type. 2019-08-01 09:34:14 -07:00
pg_amproc.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_attrdef.h Initial pgindent run for v12. 2019-05-22 12:55:34 -04:00
pg_attribute.h Generated columns 2019-03-30 08:15:57 +01:00
pg_auth_members.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_authid.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_authid.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_cast.dat Add support for multivariate MCV lists 2019-03-27 18:32:18 +01:00
pg_cast.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_class.dat Generated columns 2019-03-30 08:15:57 +01:00
pg_class.h Add BKI_DEFAULT to pg_class.relrewrite 2019-03-14 21:25:39 +01:00
pg_collation.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_collation.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_constraint.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_control.h Add basic infrastructure for 64 bit transaction IDs. 2019-03-28 18:12:20 +13:00
pg_conversion.dat Remove dead encoding-conversion functions. 2019-07-05 14:17:27 -04:00
pg_conversion.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_database.dat Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_database.h Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_db_role_setting.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_default_acl.h Initial pgindent run for v12. 2019-05-22 12:55:34 -04:00
pg_depend.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_description.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_enum.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_event_trigger.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_extension.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_foreign_data_wrapper.h Fix more typos and inconsistencies in the tree 2019-06-17 16:13:16 +09:00
pg_foreign_server.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_foreign_table.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_index.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_inherits.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_init_privs.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_language.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_language.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_largeobject.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_largeobject_metadata.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_namespace.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_namespace.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_opclass.dat Fix up handling of nondeterministic collations with pattern_ops opclasses. 2019-09-21 16:29:17 -04:00
pg_opclass.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_operator.dat Fix up handling of nondeterministic collations with pattern_ops opclasses. 2019-09-21 16:29:17 -04:00
pg_operator.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_opfamily.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_opfamily.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_partitioned_table.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_pltemplate.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_pltemplate.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_policy.h Initial pgindent run for v12. 2019-05-22 12:55:34 -04:00
pg_proc.dat Implement jsonpath .datetime() method 2019-09-25 22:51:51 +03:00
pg_proc.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_publication.h Remove redundant prototypes for SQL callable functions. 2019-08-16 10:17:32 -07:00
pg_publication_rel.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_range.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_range.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_replication_origin.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_rewrite.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_seclabel.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_sequence.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_shdepend.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_shdescription.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_shseclabel.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_statistic.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_statistic_ext.h Allow setting statistics target for extended statistics 2019-09-11 00:25:51 +02:00
pg_statistic_ext_data.h pgindent run prior to branching v12. 2019-07-01 12:37:52 -04:00
pg_subscription.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_subscription_rel.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_tablespace.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_tablespace.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_transform.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_trigger.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_ts_config.dat Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_ts_config.h Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_ts_config_map.dat Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_ts_config_map.h Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_ts_dict.dat Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_ts_dict.h Remove remaining hard-wired OID references in the initial catalog data. 2019-03-12 12:30:35 -04:00
pg_ts_parser.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_ts_parser.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_ts_template.dat Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_ts_template.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
pg_type.dat Do pre-release housekeeping on catalog data, and fix jsonpath send/recv. 2019-04-28 17:16:50 -04:00
pg_type.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
pg_user_mapping.h Update copyright for 2019 2019-01-02 12:44:25 -05:00
reformat_dat_file.pl Minor improvements for reformat_dat_file.pl. 2019-03-08 11:48:49 -05:00
renumber_oids.pl Create a script that can renumber manually-assigned OIDs. 2019-03-12 10:50:48 -04:00
storage.h Phase 2 pgindent run for v12. 2019-05-22 13:04:48 -04:00
storage_xlog.h Fix several recently introduced issues around handling new relation forks. 2019-04-29 19:28:05 -07:00
toasting.h Rework the pg_statistic_ext catalog 2019-06-16 01:20:31 +02:00
unused_oids Show specific OID suggestion in unused_oids output. 2019-08-05 11:47:34 -07:00