Posted on 2017-02-09
The PostgreSQL Global Development Group has released an update to all supported versions of our database system, including 9.6.2, 9.5.6, 9.4.11, 9.3.16, and 9.2.20. This release includes fixes that prevent data corruption issues in index builds and in certain write-ahead-log replay situations, which are detailed below. It also patches over 75 other bugs reported over the last three months.
Users should plan to apply this update at the next scheduled downtime.
Build corruption with CREATE INDEX CONCURRENTLY
There existed a race condition if CREATE INDEX CONCURRENTLY was called on a column that had not been indexed before, then rows that were updated by transactions running at the same time as the CREATE INDEX CONCURRENTLY command could have been indexed incorrectly.
If you suspect this may have happened, the most reliable solution is to rebuild affected indexes after installing this update.
This issue is present in the 9.2, 9.3, 9.4, 9.5, and 9.6 series
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