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Revert SQL/JSON features
The reverts the following and makes some associated cleanups: commit f79b803: Common SQL/JSON clauses commit f4fb45d: SQL/JSON constructors commit 5f0adec: Make STRING an unreserved_keyword. commit 33a3776: IS JSON predicate commit 1a36bc9: SQL/JSON query functions commit 606948b: SQL JSON functions commit 49082c2: RETURNING clause for JSON() and JSON_SCALAR() commit 4e34747: JSON_TABLE commit fadb48b: PLAN clauses for JSON_TABLE commit 2ef6f11: Reduce running time of jsonb_sqljson test commit 14d3f24: Further improve jsonb_sqljson parallel test commit a6baa4b: Documentation for SQL/JSON features commit b46bcf7: Improve readability of SQL/JSON documentation. commit 112fdb3: Fix finalization for json_objectagg and friends commit fcdb35c: Fix transformJsonBehavior commit 4cd8717: Improve a couple of sql/json error messages commit f7a605f: Small cleanups in SQL/JSON code commit 9c3d25e: Fix JSON_OBJECTAGG uniquefying bug commit a79153b: Claim SQL standard compliance for SQL/JSON features commit a1e7616: Rework SQL/JSON documentation commit 8d9f963: Fix errors in copyfuncs/equalfuncs support for JSON node types. commit 3c633f3: Only allow returning string types or bytea from json_serialize commit 67b2670: expression eval: Fix EEOP_JSON_CONSTRUCTOR and EEOP_JSONEXPR size. The release notes are also adjusted. Backpatch to release 15. Discussion: https://postgr.es/m/40d2c882-bcac-19a9-754d-4299e1d87ac7@postgresql.org
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‎doc/src/sgml/func.sgml‎

Lines changed: 6 additions & 1059 deletions
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‎doc/src/sgml/keywords/sql2016-02-reserved.txt‎

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@@ -157,7 +157,6 @@ INTERVAL
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INTO
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IS
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JOIN
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JSON
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JSON_ARRAY
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JSON_ARRAYAGG
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JSON_EXISTS

‎doc/src/sgml/release-15.sgml‎

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@@ -2054,99 +2054,6 @@ Author: Tom Lane <tgl@sss.pgh.pa.us>
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</itemizedlist>
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<sect4>
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<title><acronym>JSON</acronym></title>
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<itemizedlist>
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<!--
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-03-27 [f79b803dc] Common SQL/JSON clauses
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-03-27 [f4fb45d15] SQL/JSON constructors
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-03-30 [606948b05] SQL JSON functions
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-03-31 [49082c2cc] RETURNING clause for JSON() and JSON_SCALAR()
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-04-07 [a6baa4bad] Documentation for SQL/JSON features
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-->
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<listitem>
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<para>
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Add <acronym>SQL</acronym>/<acronym>JSON</acronym>-standard
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<acronym>JSON</acronym> constructors (Nikita Glukhov)
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</para>
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<para>
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The construction functions are <link
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linkend="functions-sqljson-producing"><function>json()</function></link>,
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<function>json_scalar()</function>, and
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<function>json_serialize()</function>,
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<function>json_array()</function>,
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<function>json_arrayagg()</function>,
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<function>json_object()</function>, and
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<function>json_objectagg()</function>. They have a few functional
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advantages over the existing JSON functions.
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</para>
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</listitem>
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<!--
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-03-29 [1a36bc9db] SQL/JSON query functions
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-->
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<listitem>
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<para>
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Add <acronym>SQL</acronym>/<acronym>JSON</acronym>
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query functions <link
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linkend="functions-sqljson-querying"><function>json_exists()</function></link>,
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<function>json_query()</function>, and
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<function>json_value()</function> (Nikita Glukhov)
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</para>
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</listitem>
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<!--
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-03-28 [33a377608] IS JSON predicate
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-->
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<listitem>
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<para>
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Add <acronym>JSON</acronym> predicates to test
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<type>JSON</type>/<type>JSONB</type> values (Nikita Glukhov)
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</para>
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<para>
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The clauses are <link linkend="functions-sqljson-misc"><literal>IS
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JSON</literal></link> [ <literal>VALUE</literal> |
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<literal>ARRAY</literal>
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| <literal>OBJECT</literal> | <literal>SCALAR</literal> |
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[<literal>WITH</literal> | <literal>WITHOUT</literal> ]
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<literal>UNIQUE KEYS</literal> ].
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</para>
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</listitem>
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<!--
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-04-04 [4e34747c8] JSON_TABLE
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Author: Andrew Dunstan <andrew@dunslane.net>
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2022-04-05 [fadb48b00] PLAN clauses for JSON_TABLE
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-->
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<listitem>
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<para>
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Add function <link
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linkend="functions-sqljson-table"><function>JSON_TABLE()</function></link>
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to cause <acronym>JSON</acronym> data to be treated as a table
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(Nikita Glukhov)
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</para>
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</listitem>
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</itemizedlist>
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</sect4>
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</sect3>
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<sect3>

‎src/backend/catalog/sql_features.txt‎

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@@ -527,28 +527,28 @@ T652 SQL-dynamic statements in SQL routines NO
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T653 SQL-schema statements in external routines YES
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T654 SQL-dynamic statements in external routines NO
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T655 Cyclically dependent routines YES
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T811 Basic SQL/JSON constructor functions YES
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T812 SQL/JSON: JSON_OBJECTAGG YES
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T813 SQL/JSON: JSON_ARRAYAGG with ORDER BY YES
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T814 Colon in JSON_OBJECT or JSON_OBJECTAGG YES
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T821 Basic SQL/JSON query operators YES
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T822 SQL/JSON: IS JSON WITH UNIQUE KEYS predicate YES
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T823 SQL/JSON: PASSING clause YES
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T824 JSON_TABLE: specific PLAN clause YES
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T825 SQL/JSON: ON EMPTY and ON ERROR clauses YES
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T826 General value expression in ON ERROR or ON EMPTY clauses YES
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T827 JSON_TABLE: sibling NESTED COLUMNS clauses YES
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T828 JSON_QUERY YES
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T829 JSON_QUERY: array wrapper options YES
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T830 Enforcing unique keys in SQL/JSON constructor functions YES
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T811 Basic SQL/JSON constructor functions NO
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T812 SQL/JSON: JSON_OBJECTAGG NO
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T813 SQL/JSON: JSON_ARRAYAGG with ORDER BY NO
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T814 Colon in JSON_OBJECT or JSON_OBJECTAGG NO
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T821 Basic SQL/JSON query operators NO
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T822 SQL/JSON: IS JSON WITH UNIQUE KEYS predicate NO
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T823 SQL/JSON: PASSING clause NO
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T824 JSON_TABLE: specific PLAN clause NO
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T825 SQL/JSON: ON EMPTY and ON ERROR clauses NO
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T826 General value expression in ON ERROR or ON EMPTY clauses NO
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T827 JSON_TABLE: sibling NESTED COLUMNS clauses NO
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T828 JSON_QUERY NO
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T829 JSON_QUERY: array wrapper options NO
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T830 Enforcing unique keys in SQL/JSON constructor functions NO
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T831 SQL/JSON path language: strict mode YES
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T832 SQL/JSON path language: item method YES
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T833 SQL/JSON path language: multiple subscripts YES
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T834 SQL/JSON path language: wildcard member accessor YES
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T835 SQL/JSON path language: filter expressions YES
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T836 SQL/JSON path language: starts with predicate YES
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T837 SQL/JSON path language: regex_like predicate YES
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T838 JSON_TABLE: PLAN DEFAULT clause YES
551+
T838 JSON_TABLE: PLAN DEFAULT clause NO
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T839 Formatted cast of datetimes to/from character strings NO
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M001 Datalinks NO
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M002 Datalinks via SQL/CLI NO

‎src/backend/commands/explain.c‎

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@@ -3830,13 +3830,7 @@ ExplainTargetRel(Plan *plan, Index rti, ExplainState *es)
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break;
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case T_TableFuncScan:
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Assert(rte->rtekind == RTE_TABLEFUNC);
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if (rte->tablefunc)
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if (rte->tablefunc->functype == TFT_XMLTABLE)
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objectname = "xmltable";
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else /* Must be TFT_JSON_TABLE */
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objectname = "json_table";
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else
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objectname = NULL;
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objectname = "xmltable";
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objecttag = "Table Function Name";
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break;
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case T_ValuesScan:

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