Historial de Versiones de PostgreSQL 9.1.13 (x64)

Changes

• Restore GIN metapages unconditionally to avoid torn-page risk (Heikki Linnakangas)
• Although this oversight could theoretically result in a corrupted index, it is unlikely to have caused any problems in practice, since the active part of a GIN metapage is smaller than a standard 512-byte disk sector.
• Avoid race condition in checking transaction commit status during receipt of a NOTIFY message (Marko Tiikkaja)
• This prevents a scenario wherein a sufficiently fast client might respond to a notification before database updates made by the notifier have become visible to the recipient.
• Allow regular-expression operators to be terminated early by query cancel requests (Tom Lane)
• This prevents scenarios wherein a pathological regular expression could lock up a server process uninterruptably for a long time.
• Remove incorrect code that tried to allow OVERLAPS with single-element row arguments (Joshua Yanovski)
• This code never worked correctly, and since the case is neither specified by the SQL standard nor documented, it seemed better to remove it than fix it.
• Avoid getting more than AccessShareLock when de-parsing a rule or view (Dean Rasheed)
• This oversight resulted in pg_dump unexpectedly acquiring RowExclusiveLock locks on tables mentioned as the targets of INSERT/UPDATE/DELETE commands in rules. While usually harmless, that could interfere with concurrent transactions that tried to acquire, for example, ShareLock on those tables.
• Improve performance of index endpoint probes during planning (Tom Lane)
• This change fixes a significant performance problem that occurred when there were many not-yet-committed rows at the end of the index, which is a common situation for indexes on sequentially-assigned values such as timestamps or sequence-generated identifiers.
• Fix walsender's failure to shut down cleanly when client is pg_receivexlog (Fujii Masao)
• Fix test to see if hot standby connections can be allowed immediately after a crash (Heikki Linnakangas)
• Prevent interrupts while reporting non-ERROR messages (Tom Lane)
• This guards against rare server-process freezeups due to recursive entry to syslog(), and perhaps other related problems.
• Fix memory leak in PL/Perl when returning a composite result, including multiple-OUT-parameter cases (Alex Hunsaker)
• Prevent intermittent "could not reserve shared memory region" failures on recent Windows versions (MauMau)
• Update time zone data files to tzdata release 2014a for DST law changes in Fiji and Turkey, plus historical changes in Israel and Ukraine.