doc PG 17 relnotes: add major features list
Reported-by: Tom Lane Discussion: https://postgr.es/m/d1748552-31f5-4f80-937b-767b5f7d8324@postgresql.org Author: Jonathan Katz Backpatch-through: 17 only
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</para>
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<itemizedlist>
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<listitem><para>TO BE COMPLETED LATER</para></listitem>
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<listitem>
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<para>
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New memory management system for <command>VACUUM</command>, which reduces
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memory consumption and can improve overall vacuuming performance.
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</para>
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</listitem>
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<listitem>
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<para>
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New <acronym>SQL/JSON</acronym> capabilities, including constructors,
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identity functions, and the <link
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linkend="functions-sqljson-table"><function>JSON_TABLE()</function></link>
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function, which converts JSON data into a table representation.
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</para>
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</listitem>
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<listitem>
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<para>
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Various query performance improvements, including to sequential reads
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using streaming I/O, write throughput under high concurrency, and
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searches over multiple values in a <link linkend="btree">btree</link>
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index.
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</para>
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</listitem>
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<listitem>
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<para>
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Logical replication enhancements, including:
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<itemizedlist>
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<listitem>
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<para>
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Failover control
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</para>
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</listitem>
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<listitem>
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<para>
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<link
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linkend="app-pgcreatesubscriber"><application>pg_createsubscriber</application></link>,
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a utility that logical replicas from physical standbys
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</para>
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</listitem>
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<listitem>
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<para>
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<link
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linkend="pgupgrade"><application>pg_upgrade</application></link> now
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preserves replication slots on both publishers and subscribers
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</para>
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</listitem>
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</itemizedlist>
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</para>
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</listitem>
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<listitem>
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<para>
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New client-side connection option, <link
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linkend="libpq-connect-sslnegotiation"><literal>sslnegotiation=direct</literal></link>,
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that allows direct TLS handshakes that avoids a round-trip negotation.
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</para>
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</listitem>
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<listitem>
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<para>
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<link
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linkend="app-pgbasebackup"><application>pg_basebackup</application></link>
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now supports incremental backup.
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</para>
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</listitem>
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<listitem>
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<para>
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<link linkend="sql-copy"><command>COPY</command></link> adds a new option,
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<literal>ON_ERROR ignore</literal>, that allows a copy operation to
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continue in the event of an error.
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</para>
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</listitem>
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</itemizedlist>
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<para>
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