86ab7f4c72
This patch adds the PLAN clauses for JSON_TABLE, which allow the user to specify how data from nested paths are joined, allowing considerable freedom in shaping the tabular output of JSON_TABLE. PLAN DEFAULT allows the user to specify the global strategies when dealing with sibling or child nested paths. This is often sufficient to achieve the necessary goal, and is considerably simpler than the full PLAN clause, which allows the user to specify the strategy to be used for each named nested path. Path names may be attached to the row pattern and to each NESTED path using AS. Unlike the SQL/JSON standard, which requires a name for every NESTED path when a PLAN clause is present, PostgreSQL does not require them and generates a name for any path left unnamed; a specific PLAN() can only reference paths by name, so unnamed paths it must mention are reported as not covered by the plan. Author: Nikita Malakhov <n.malakhov@postgrespro.ru> Co-authored-by: Nikita Glukhov <n.gluhov@postgrespro.ru> Co-authored-by: Teodor Sigaev <teodor@sigaev.ru> Co-authored-by: Oleg Bartunov <obartunov@gmail.com> Co-authored-by: Alexander Korotkov <aekorotkov@gmail.com> Co-authored-by: Andrew Dunstan <andrew@dunslane.net> Co-authored-by: Amit Langote <amitlangote09@gmail.com> Co-authored-by: Anton Melnikov <a.melnikov@postgrespro.ru> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com> Reviewed-by: Andrew Alsup <bluesbreaker@gmail.com> Reviewed-by: Erik Rijkers <er@xs4all.nl> Reviewed-by: Zhihong Yu <zyu@yugabyte.com> Reviewed-by: Himanshu Upadhyaya <upadhyaya.himanshu@gmail.com> Reviewed-by: Daniel Gustafsson <daniel@yesql.se> Reviewed-by: Justin Pryzby <pryzby@telsasoft.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Reviewed-by: jian he <jian.universality@gmail.com> Reviewed-by: Vladlen Popolitov <v.popolitov@postgrespro.ru> Discussion: https://postgr.es/m/cd0bb935-0158-78a7-08b5-904886deac4b@postgrespro.ru Discussion: https://postgr.es/m/20220616233130.rparivafipt6doj3@alap3.anarazel.de Discussion: https://postgr.es/m/abd9b83b-aa66-f230-3d6d-734817f0995d%40postgresql.org Discussion: https://postgr.es/m/CA+HiwqE4XTdfb1nW=Ojoy_tQSRhYt-q_kb6i5d4xcKyrLC1Nbg@mail.gmail.com Discussion: https://postgr.es/m/CAN-LCVP7HXmGu-WcinsHvdKqMGEdv=1Y67H4U58F6Y=Q0M5GyQ@mail.gmail.com |
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| aclocal.m4 | ||
| configure | ||
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| COPYRIGHT | ||
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| README.md | ||
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.