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The replication issue affects some users of PostgreSQL binary replication, and can cause minor data loss between the master and the standby. While not all users are affected, it is difficult to predict when the bug will occur, so we urge all users of replication and continuous backup (PITR) to update immediately. Additionally, users who had replication running under PostgreSQL minor versions 9.3.0, 9.3.1, 9.2.5, 9.1.10, or 9.0.14 should plan to take a fresh base backup of each standby after update, in order to ensure no prior data corruption already exists. This release also fixes two timing issues with VACUUM, which can cause old, overwritten or deleted rows to re-appear at a later date under some circumstances. Users with very high transaction rates, particularly those who experience "transaction ID wraparound" every few weeks or less, are the most at risk for this issue. Those users should set vacuum_freeze_table_age to 0, and run a database-wide VACUUM after the update. The second of the two VACUUM issues affects only 9.3, making it expecially important for 9.3 users to update.
36 lines
1.8 KiB
Text
36 lines
1.8 KiB
Text
This package provides the following PostgreSQL modules: citext, hstore,
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intarray, isn, ltree, lo, uuid-ossp, unaccent.
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The "citext" module provides a case-insensitive character string type,
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citext. Essentially, it internally calls lower when comparing values.
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Otherwise, it behaves almost exactly like text.
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The "hstore" module implements the "hstore" data type for storing sets
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of key/value pairs within a single PostgreSQL value. This can be useful
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in various scenarios, such as rows with many attributes that are rarely
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examined, or semi-structured data. Keys and values are simply text strings.
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The "intarray" module provides a number of useful functions and operators
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for manipulating one-dimensional arrays of integers. There is also support
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for indexed searches using some of the operators.
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The "isn" module provides data types for the following international
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product numbering standards: EAN13, UPC, ISBN (books), ISMN (music),
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and ISSN (serials). Numbers are validated on input, and correctly
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hyphenated on output.
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The "ltree" module implements a data type ltree for representing
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labels of data stored in a hierarchical tree-like structure.
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Extensive facilities for searching through label trees are provided.
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The "lo" module provides support for managing Large Objects (also called
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LOs or BLOBs). This includes a data type "lo" and a trigger "lo_manage."
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The "uuid-ossp" module provides functions to generate universally unique
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identifiers (UUIDs) using one of several standard algorithms. There are
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also functions to produce certain special UUID constants.
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"unaccent" is a text search dictionary that removes accents (diacritic signs)
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from lexemes. It's a filtering dictionary, which means its output is always
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passed to the next dictionary (if any), unlike the normal behavior of
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dictionaries. This allows accent-insensitive processing for full text search.
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