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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>E.4. Release 15.1</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="release-15-2.html" title="E.3. Release 15.2" /><link rel="next" href="release-15.html" title="E.5. Release 15" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">E.4. Release 15.1</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="release-15-2.html" title="E.3. Release 15.2">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="release.html" title="Appendix E. Release Notes">Up</a></td><th width="60%" align="center">Appendix E. Release Notes</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="release-15.html" title="E.5. Release 15">Next</a></td></tr></table><hr /></div><div class="sect1" id="RELEASE-15-1"><div class="titlepage"><div><div><h2 class="title" style="clear: both">E.4. Release 15.1</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="release-15-1.html#id-1.11.6.8.4">E.4.1. Migration to Version 15.1</a></span></dt><dt><span class="sect2"><a href="release-15-1.html#id-1.11.6.8.5">E.4.2. Changes</a></span></dt></dl></div><p><strong>Release date: </strong>2022-11-10</p><p>
This release contains a variety of fixes from 15.0.
For information about new features in major release 15, see
<a class="xref" href="release-15.html" title="E.5. Release 15">Section E.5</a>.
</p><div class="sect2" id="id-1.11.6.8.4"><div class="titlepage"><div><div><h3 class="title">E.4.1. Migration to Version 15.1</h3></div></div></div><p>
A dump/restore is not required for those running 15.X.
</p><p>
However, if you regularly create and drop tables exceeding 1GB,
see the first changelog entry below.
</p></div><div class="sect2" id="id-1.11.6.8.5"><div class="titlepage"><div><div><h3 class="title">E.4.2. Changes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
Fix failure to remove non-first segments of large tables
(Tom Lane)
</p><p>
<span class="productname">PostgreSQL</span> splits large tables into
multiple files (normally with 1GB per file). The logic for dropping
a table was broken and would miss removing all but the first such
file, in two cases: drops of temporary tables and WAL replay of
drops of regular tables. Applications that routinely create
multi-gigabyte temporary tables could suffer significant disk space
leakage.
</p><p>
Orphaned temporary-table files are removed during postmaster start,
so the mere act of updating to 15.1 is sufficient to clear any
leaked temporary-table storage. However, if you suffered any
database crashes while using 15.0, and there might have been
large tables dropped just before such crashes, it's advisable
to check the database directories for files named according to the
pattern
<code class="literal"><em class="replaceable"><code>NNNN</code></em>.<em class="replaceable"><code>NN</code></em></code>.
If there is no matching file named
just <code class="literal"><em class="replaceable"><code>NNNN</code></em></code> (without
the <code class="literal">.<em class="replaceable"><code>NN</code></em></code> suffix), these
files should be removed manually.
</p></li><li class="listitem"><p>
Fix handling of <code class="literal">DEFAULT</code> tokens that appear
in a multi-row <code class="literal">VALUES</code> clause of an
<code class="command">INSERT</code> on an updatable view (Tom Lane)
</p><p>
This oversight could lead to <span class="quote">“<span class="quote">cache lookup failed for
type</span>”</span> errors, or in older branches even to crashes.
</p></li><li class="listitem"><p>
Disallow rules named <code class="literal">_RETURN</code> that are
not <code class="literal">ON SELECT</code> (Tom Lane)
</p><p>
This avoids confusion between a view's <code class="literal">ON SELECT</code>
rule and any other rules it may have.
</p></li><li class="listitem"><p>
Avoid failure in <code class="command">EXPLAIN VERBOSE</code> for a query
using <code class="literal">SEARCH BREADTH FIRST</code> with constant
initial values (Tom Lane)
</p></li><li class="listitem"><p>
Prevent use of <code class="command">MERGE</code> on a partitioned table with
foreign-table partitions (Álvaro Herrera)
</p><p>
The case isn't supported, and previously threw an incomprehensible
error.
</p></li><li class="listitem"><p>
Fix construction of per-partition foreign key constraints while
doing <code class="command">ALTER TABLE ATTACH PARTITION</code>
(Jehan-Guillaume de Rorthais, Álvaro Herrera)
</p><p>
Previously, incorrect or duplicate constraints could be constructed
for the newly-added partition.
</p></li><li class="listitem"><p>
Fix planner failure with extended statistics on partitioned or
inherited tables (Richard Guo, Justin Pryzby)
</p><p>
Some cases failed with <span class="quote">“<span class="quote">cache lookup failed for statistics
object</span>”</span>.
</p></li><li class="listitem"><p>
Fix mis-ordering of WAL operations in fast insert path for GIN
indexes (Matthias van de Meent, Zhang Mingli)
</p><p>
This mistake is not known to have any negative consequences within
core <span class="productname">PostgreSQL</span>, but it did cause issues
for some extensions.
</p></li><li class="listitem"><p>
Fix bugs in logical decoding when replay starts from a point
between the beginning of a transaction and the beginning of its
subtransaction (Masahiko Sawada, Kuroda Hayato)
</p><p>
These errors could lead to assertion failures in debug builds, and
otherwise to memory leaks.
</p></li><li class="listitem"><p>
Accept interrupts in more places during logical decoding (Amit
Kapila, Masahiko Sawada)
</p><p>
This ameliorates problems with slow shutdown of replication workers.
</p></li><li class="listitem"><p>
Prevent attempts to replicate into a foreign-table partition in
replication workers (Shi Yu, Tom Lane)
</p><p>
Although partitioned tables can have foreign tables as partitions,
replicating into such a partition isn't currently supported.
The logical replication worker process would crash if it was
attempted. Now, an error is thrown.
</p></li><li class="listitem"><p>
Avoid crash after function syntax error in replication workers
(Maxim Orlov, Anton Melnikov, Masahiko Sawada, Tom Lane)
</p><p>
If a syntax error occurred in a SQL-language or PL/pgSQL-language
<code class="command">CREATE FUNCTION</code> or <code class="command">DO</code> command
executed in a logical replication worker, the worker process would
crash with a null pointer dereference or assertion failure.
</p></li><li class="listitem"><p>
Avoid double call of the shutdown callback of an archiver module
(Nathan Bossart, Bharath Rupireddy)
</p></li><li class="listitem"><p>
Add plan-time check for attempted access to a table that has no
table access method (Tom Lane)
</p><p>
This prevents a crash in some catalog-corruption scenarios, for
example use of a view whose <code class="literal">ON SELECT</code> rule is
missing.
</p></li><li class="listitem"><p>
Prevent postmaster crash when shared-memory state is corrupted
(Tom Lane)
</p><p>
The postmaster process is supposed to survive and initiate a
database restart if shared memory becomes corrupted, but one
bit of code was being insufficiently cautious about that.
</p></li><li class="listitem"><p>
In <span class="application">libpq</span>, handle single-row mode
correctly when pipelining (Denis Laxalde)
</p><p>
The single-row flag was not reset at the correct time if pipeline
mode was also active.
</p></li><li class="listitem"><p>
Fix <span class="application">psql</span>'s exit status when a
command-line query is canceled (Peter Eisentraut)
</p><p>
<code class="literal">psql -c <em class="replaceable"><code>query</code></em></code> would
exit successfully if the query was canceled. Fix it to exit with
nonzero status, as in other error cases.
</p></li><li class="listitem"><p>
Allow cross-platform tablespace relocation
in <span class="application">pg_basebackup</span> (Robert Haas)
</p><p>
Allow the remote path in <code class="option">--tablespace-mapping</code> to be
either a Unix-style or Windows-style absolute path, since the source
server could be on a different OS than the local system.
</p></li><li class="listitem"><p>
Fix <span class="application">pg_dump</span>'s failure to dump comments
attached to some <code class="literal">CHECK</code> constraints (Tom Lane)
</p></li><li class="listitem"><p>
Fix <code class="command">CREATE DATABASE</code> to allow
its <code class="literal">oid</code> parameter to exceed
2<sup>31</sup> (Tom Lane)
</p><p>
This oversight prevented <span class="application">pg_upgrade</span> from
succeeding when the source installation contained databases with
OIDs larger than that.
</p></li><li class="listitem"><p>
In <span class="application">pg_stat_statements</span>, fix access to
already-freed memory (zhaoqigui)
</p><p>
This occurred if <span class="application">pg_stat_statements</span>
tracked a <code class="command">ROLLBACK</code> command issued via extended
query protocol. In debug builds it consistently led to an assertion
failure. In production builds there would often be no visible ill
effect; but if the freed memory had already been reused, the likely
result would be to store garbage for the query string.
</p></li><li class="listitem"><p>
Fix incompatibilities with LLVM 15 (Thomas Munro, Andres Freund)
</p></li><li class="listitem"><p>
Allow use of <code class="function">__sync_lock_test_and_set()</code> for
spinlocks on any machine (Tom Lane)
</p><p>
This eases porting to new machine architectures, at least if you're
using a compiler that supports this GCC builtin function.
</p></li><li class="listitem"><p>
Rename symbol <code class="literal">REF</code> to <code class="literal">REF_P</code> to
avoid compile failure on recent macOS (Tom Lane)
</p></li><li class="listitem"><p>
Avoid using <code class="function">sprintf</code>, to avoid compile-time
deprecation warnings (Tom Lane)
</p></li><li class="listitem"><p>
Update time zone data files to <span class="application">tzdata</span>
release 2022f for DST law changes in Chile, Fiji, Iran, Jordan,
Mexico, Palestine, and Syria, plus historical corrections for Chile,
Crimea, Iran, and Mexico.
</p><p>
Also, the Europe/Kiev zone has been renamed to Europe/Kyiv.
Also, the following zones have been merged into nearby,
more-populous zones whose clocks have agreed with them since 1970:
Antarctica/Vostok, Asia/Brunei,
Asia/Kuala_Lumpur, Atlantic/Reykjavik, Europe/Amsterdam,
Europe/Copenhagen, Europe/Luxembourg, Europe/Monaco, Europe/Oslo,
Europe/Stockholm, Indian/Christmas, Indian/Cocos, Indian/Kerguelen,
Indian/Mahe, Indian/Reunion, Pacific/Chuuk, Pacific/Funafuti,
Pacific/Majuro, Pacific/Pohnpei, Pacific/Wake and Pacific/Wallis.
(This indirectly affects zones that were already links to one of
these: Arctic/Longyearbyen, Atlantic/Jan_Mayen, Iceland,
Pacific/Ponape, Pacific/Truk, and Pacific/Yap.) America/Nipigon,
America/Rainy_River, America/Thunder_Bay, Europe/Uzhgorod, and
Europe/Zaporozhye were also merged into nearby zones after
discovering that their claimed post-1970 differences from those
zones seem to have been errors.
In all these cases, the previous zone name remains as an alias;
but the actual data is that of the zone that was merged into.
</p><p>
These zone mergers result in loss of pre-1970 timezone history for
the merged zones, which may be troublesome for applications
expecting consistency of <code class="type">timestamptz</code> display. As an
example, the stored value <code class="literal">1944-06-01 12:00 UTC</code>
would previously display as <code class="literal">1944-06-01
13:00:00+01</code> if the Europe/Stockholm zone is selected, but
now it will read out as <code class="literal">1944-06-01 14:00:00+02</code>.
</p><p>
It is possible to build the time zone data files with options that
will restore the older zone data, but that choice also inserts a lot
of other old (and typically poorly-attested) zone data, resulting in
more total changes from the previous release than accepting these
upstream changes does. <span class="productname">PostgreSQL</span> has
chosen to ship the <span class="productname">tzdb</span> data
as-recommended, and so far as we are aware most major operating
system distributions are doing likewise. However, if these changes
cause significant problems for your application, a possible solution
is to install a local build of the time zone data files using
<span class="productname">tzdb</span>'s backwards-compatibility options
(see their <code class="literal">PACKRATDATA</code>
and <code class="literal">PACKRATLIST</code> options).
</p></li></ul></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="release-15-2.html" title="E.3. Release 15.2">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="release.html" title="Appendix E. Release Notes">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="release-15.html" title="E.5. Release 15">Next</a></td></tr><tr><td width="40%" align="left" valign="top">E.3. Release 15.2 </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> E.5. Release 15</td></tr></table></div></body></html>
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