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Merged
merged 2 commits into from
Jun 7, 2025
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[pull] master from postgres:master #72

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37e5f0b
doc PG 18 relnotes: adjust wording of initdb item 48814415d5a
bmomjian Jun 7, 2025
73e26cb
doc PG 18 relnotes: add AFTER trigger user change item
bmomjian Jun 7, 2025
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55 changes: 34 additions & 21 deletions doc/src/sgml/release-18.sgml
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,24 @@

<itemizedlist>

<!--
Author: Peter Eisentraut <[email protected]>
2024-10-16 [04bec894a04] initdb: Change default to using data checksums.
-->

<listitem>
<para>
Change initdb default to enable data checksums
<ulink url="&commit_baseurl;04bec894a04">&sect;</ulink>
</para>

<para>
Checksums can be disabled with the new initdb option --no-data-checksums.
pg_upgrade requires matching cluster checksum settings, so this new
option can be useful to upgrade non-checksum old clusters.
</para>
</listitem>

<!--
Author: Tom Lane <[email protected]>
2025-01-16 [d7674c9fa] Seek zone abbreviations in the IANA data before timezone
Expand Down Expand Up @@ -139,6 +157,22 @@ Previously ALTER TABLE SET [UN]LOGGED did nothing, and the creation of an unlogg
</para>
</listitem>

<!--
Author: Tom Lane <[email protected]>
2025-01-23 [01463e1cc] Ensure that AFTER triggers run as the instigating user.
-->

<listitem>
<para>
Execute AFTER triggers as the role that was active when trigger events were queued (Laurenz Albe)
</para>

<para>
Previously such triggers were run as the role that was active at trigger execution time (e.g., at COMMIT). This is significant for cases where the role is changed between queue time and
transaction commit.
</para>
</listitem>

<!--
Author: Fujii Masao <[email protected]>
2024-09-12 [fefa76f70] Remove old RULE privilege completely.
Expand Down Expand Up @@ -192,27 +226,6 @@ Change pg_backend_memory_contexts.level and pg_log_backend_memory_contexts() to
<para>
These were previously zero-based.
</para>
</listitem>

<!--
Author: Peter Eisentraut <[email protected]>
2024-10-16 [04bec894a04] initdb: Change default to using data checksums.
-->

<listitem>
<para>
initdb defaults to enabling data checksums
<ulink url="&commit_baseurl;04bec894a04">&sect;</ulink>
</para>

<para>
The previous default behavior (checksums disabled) can be obtained using the
new option --no-data-checksums. Note that pg_upgrade will reject upgrading
between clusters with different checksum settings, so if the old cluster does
not have checksums enabled (the previous default), then the new cluster will
need to be initialized with --no-data-checksums in order to allow pg_upgrade
to succeed.
</para>
</listitem>

</itemizedlist>
Expand Down