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Download PostgreSQL 9.5.3

PostgreSQL  9.5.3

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# Changes
- Clear the OpenSSL error queue before OpenSSL calls, rather than assuming it's clear already; and make sure we leave it clear afterwards
- 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 libpq 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.
- Fix "failed to build any N-way joins" planner error with a full join enclosed in the right-hand side of a left join
- Fix incorrect handling of equivalence-class tests in multilevel nestloop plans
- Given a three-or-more-way equivalence class of variables, such as X.X = Y.Y = Z.Z, 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 WHERE clauses. For various reasons, erroneous plans were seldom selected in practice, so that this bug has gone undetected for a long time.
- Fix corner-case parser failures occurring when operator_precedence_warning is turned on
- An example is that SELECT (ARRAY[])::text[] gave an error, though it worked without the parentheses.
- Fix query-lifespan memory leak in GIN index scans
- Fix query-lifespan memory leak and potential index corruption hazard in GIN index insertion
- The memory leak would typically not amount to much in simple queries, but it could be very substantial during a large GIN index build with high maintenance_work_mem.
- Fix possible misbehavior of TH, th, and Y,YYY format codes in to_timestamp()
- These could advance off the end of the input string, causing subsequent format codes to read garbage.
- Fix dumping of rules and views in which the array argument of a value operator ANY (array) construct is a sub-SELECT
- Disallow newlines in ALTER SYSTEM parameter values
- The configuration-file parser doesn't support embedded newlines in string literals, so we mustn't allow them in values to be inserted by ALTER SYSTEM.
- Fix ALTER TABLE ... REPLICA IDENTITY USING INDEX to work properly if an index on OID is selected
- Avoid possible misbehavior after failing to remove a tablespace symlink
- Fix crash in logical decoding on alignment-picky platforms
- The failure occurred only with a transaction large enough to spill to disk and a primary-key change within that transaction.
- Avoid repeated requests for feedback from receiver while shutting down walsender
- Make pg_regress use a startup timeout from the PGCTLTIMEOUT environment variable, if that's set
- This is for consistency with a behavior recently added to pg_ctl; it eases automated testing on slow machines.
- Fix pg_upgrade to correctly restore extension membership for operator families containing only one operator class
- 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 pg_dump runs to emit output that would cause (harmless) errors on restore.
- Fix pg_upgrade to not fail when new-cluster TOAST rules differ from old
- pg_upgrade had special-case code to handle the situation where the new PostgreSQL version thinks that a table should have a TOAST table while the old version did not. That code was broken, so remove it, and instead do nothing in such cases; there seems no reason to believe that we can't get along fine without a TOAST table if that was okay according to the old version's rules.
- Fix atomic operations for PPC when using IBM's XLC compiler
- Reduce the number of SysV semaphores used by a build configured with --disable-spinlocks
- Rename internal function strtoi() to strtoint() to avoid conflict with a NetBSD library function
- Fix reporting of errors from bind() and listen() system calls on Windows
- Reduce verbosity of compiler output when building with Microsoft Visual Studio
- Support building with Visual Studio 2015
- Note that builds made with VS2015 will not run on Windows versions before Windows Vista.
- Fix putenv() to work properly with Visual Studio 2013
- Avoid possibly-unsafe use of Windows' FormatMessage() function
- Use the FORMAT_MESSAGE_IGNORE_INSERTS flag where appropriate. No live bug is known to exist here, but it seems like a good idea to be careful.
- Update time zone data files to tzdata release 2016d for DST law changes in Russia and Venezuela. There are new zone names Europe/Kirov and Asia/Tomsk to reflect the fact that these regions now have different time zone histories from adjacent regions.

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