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>E.8. Release 9.2.17</A
></H1
><DIV
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><P
><B
>Release date: </B
>2016-05-12</P
></DIV
><P
> This release contains a variety of fixes from 9.2.16.
For information about new features in the 9.2 major release, see
<A
HREF="release-9-2.html"
>Section E.25</A
>.
</P
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>E.8.1. Migration to Version 9.2.17</A
></H2
><P
> A dump/restore is not required for those running 9.2.X.
</P
><P
> However, if you are upgrading from a version earlier than 9.2.11,
see <A
HREF="release-9-2-11.html"
>Section E.14</A
>.
</P
></DIV
><DIV
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><H2
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><A
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>E.8.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Clear the OpenSSL error queue before OpenSSL calls, rather than
assuming it's clear already; and make sure we leave it clear
afterwards (Peter Geoghegan, Dave Vitek, Peter Eisentraut)
</P
><P
> This change prevents problems when there are multiple connections
using OpenSSL within a single process and not all the code involved
follows the same rules for when to clear the error queue.
Failures have been reported specifically when a client application
uses SSL connections in <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> concurrently with
SSL connections using the PHP, Python, or Ruby wrappers for OpenSSL.
It's possible for similar problems to arise within the server as well,
if an extension module establishes an outgoing SSL connection.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="QUOTE"
>"failed to build any <TT
CLASS="REPLACEABLE"
><I
>N</I
></TT
>-way joins"</SPAN
>
planner error with a full join enclosed in the right-hand side of a
left join (Tom Lane)
</P
></LI
><LI
><P
> Fix incorrect handling of equivalence-class tests in multilevel
nestloop plans (Tom Lane)
</P
><P
> Given a three-or-more-way equivalence class of variables, such
as <TT
CLASS="LITERAL"
>X.X = Y.Y = Z.Z</TT
>, it was possible for the planner to omit
some of the tests needed to enforce that all the variables are actually
equal, leading to join rows being output that didn't satisfy
the <TT
CLASS="LITERAL"
>WHERE</TT
> clauses. For various reasons, erroneous plans
were seldom selected in practice, so that this bug has gone undetected
for a long time.
</P
></LI
><LI
><P
> Fix possible misbehavior of <TT
CLASS="LITERAL"
>TH</TT
>, <TT
CLASS="LITERAL"
>th</TT
>,
and <TT
CLASS="LITERAL"
>Y,YYY</TT
> format codes in <CODE
CLASS="FUNCTION"
>to_timestamp()</CODE
>
(Tom Lane)
</P
><P
> These could advance off the end of the input string, causing subsequent
format codes to read garbage.
</P
></LI
><LI
><P
> Fix dumping of rules and views in which the <TT
CLASS="REPLACEABLE"
><I
>array</I
></TT
>
argument of a <TT
CLASS="LITERAL"
><TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>operator</I
></TT
>
ANY (<TT
CLASS="REPLACEABLE"
><I
>array</I
></TT
>)</TT
> construct is a sub-SELECT
(Tom Lane)
</P
></LI
><LI
><P
> Make <SPAN
CLASS="APPLICATION"
>pg_regress</SPAN
> use a startup timeout from the
<TT
CLASS="ENVAR"
>PGCTLTIMEOUT</TT
> environment variable, if that's set (Tom Lane)
</P
><P
> This is for consistency with a behavior recently added
to <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
>; it eases automated testing on slow machines.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>pg_upgrade</SPAN
> to correctly restore extension
membership for operator families containing only one operator class
(Tom Lane)
</P
><P
> In such a case, the operator family was restored into the new database,
but it was no longer marked as part of the extension. This had no
immediate ill effects, but would cause later <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
>
runs to emit output that would cause (harmless) errors on restore.
</P
></LI
><LI
><P
> Back-port 9.4-era memory-barrier code changes into 9.2 and 9.3 (Tom Lane)
</P
><P
> These changes were not originally needed in pre-9.4 branches, but we
recently back-patched a fix that expected the barrier code to work
properly. Only IA64 (when using icc), HPPA, and Alpha platforms are
affected.
</P
></LI
><LI
><P
> Reduce the number of SysV semaphores used by a build configured with
<TT
CLASS="OPTION"
>--disable-spinlocks</TT
> (Tom Lane)
</P
></LI
><LI
><P
> Rename internal function <CODE
CLASS="FUNCTION"
>strtoi()</CODE
>
to <CODE
CLASS="FUNCTION"
>strtoint()</CODE
> to avoid conflict with a NetBSD library
function (Thomas Munro)
</P
></LI
><LI
><P
> Fix reporting of errors from <CODE
CLASS="FUNCTION"
>bind()</CODE
>
and <CODE
CLASS="FUNCTION"
>listen()</CODE
> system calls on Windows (Tom Lane)
</P
></LI
><LI
><P
> Reduce verbosity of compiler output when building with Microsoft Visual
Studio (Christian Ullrich)
</P
></LI
><LI
><P
> Avoid possibly-unsafe use of Windows' <CODE
CLASS="FUNCTION"
>FormatMessage()</CODE
>
function (Christian Ullrich)
</P
><P
> Use the <TT
CLASS="LITERAL"
>FORMAT_MESSAGE_IGNORE_INSERTS</TT
> flag where
appropriate. No live bug is known to exist here, but it seems like a
good idea to be careful.
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2016d
for DST law changes in Russia and Venezuela. There are new zone
names <TT
CLASS="LITERAL"
>Europe/Kirov</TT
> and <TT
CLASS="LITERAL"
>Asia/Tomsk</TT
> to reflect
the fact that these regions now have different time zone histories from
adjacent regions.
</P
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