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| {{header|docs}} | | {{header|docs}} |
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| = mysql =
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| Fedora 17 includes '''mysql''' 5.5.20, updated from 5.5.14 in Fedora 16.
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| = postgresql =
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| '''postgresql''' has been upgraded to 9.1.2
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| {{admon/warning | Potentially Incompatible Change | If you rely on the information_schema.referential_constraints view, or if you have columns of type citext, you may need to take special action. Refer to http://www.postgresql.org/docs/9.1/static/release-9-1-2.html }} | |
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| This is primarily a bugfix release.
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| = sqlite =
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| '''sqlite''' has been upgraded to 3.7.9
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| {{admon/warning | Potentially Incompatible Change | If a search token (on the right-hand side of the MATCH operator) in FTS4 begins with "^" then that token must be the first in its field of the document. }}
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| There are many changes and improvements:
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| * Orders of magnitude performance improvement for CREATE INDEX on very large tables.
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| * Improved the windows VFS to better defend against interference from anti-virus software.
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| * Improved query plan optimization when the DISTINCT keyword is present.
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| * Allow more system calls to be overridden in the unix VFS - to provide better support for chromium sandboxes.
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| * Increase the default size of a lookahead cache line from 100 to 128 bytes.
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| * Enhancements to the test_quota.c module so that it can track preexisting files.
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| * Added options SQLITE_DBSTATUS_CACHE_HIT and SQLITE_DBSTATUS_CACHE_MISS to the sqlite3_db_status() interface.
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| * Removed support for SQLITE_ENABLE_STAT2, replacing it with the much more capable SQLITE_ENABLE_STAT3 option.
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| * Enhancements to the sqlite3_analyzer utility program, including the --pageinfo and --stats options and support for multiplexed databases.
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| * Enhance the sqlite3_data_count() interface so that it can be used to determine if SQLITE_DONE has been seen on the prepared statement.
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| * Added the SQLITE_FCNTL_OVERWRITE file-control by which the SQLite core indicates to the VFS that the current transaction will overwrite the entire database file.
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| * Increase the default lookaside memory allocator allocation size from 100 to 128 bytes.
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| * Enhanced the query planner so that it can factor terms in and out of OR expressions in the WHERE clause in an effort to find better indices.
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| * Added the SQLITE_DIRECT_OVERFLOW_READ compile-time option, causing overflow pages to be read directly from the database file, bypassing the page cache.
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| * Remove limits on the magnitude of precision and width value in the format specifiers of the sqlite3_mprintf() family of string rendering routines.
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| [[Category:Docs Project]] | | [[Category:Docs Project]] |
| [[Category:Draft documentation]] | | [[Category:Draft documentation]] |
| [[Category:Documentation beats]] | | [[Category:Documentation beats]] |
