7e1f366a5d
* The default schema format number is changed from 1 to 4. This means that, unless the PRAGMA legacy_file_format=ON statement is run, newly created database files will be unreadable by version of SQLite prior to 3.3.0 (2006-01-10). It also means that the descending indices are enabled by default. * The sqlite3_pcache_methods structure and the SQLITE_CONFIG_PCACHE and SQLITE_CONFIG_GETPCACHE configuration parameters are deprecated. They are replaced by a new sqlite3_pcache_methods2 structure and SQLITE_CONFIG_PCACHE2 and SQLITE_CONFIG_GETPCACHE2 configuration parameters. * Added the powersafe overwrite property to the VFS interface. Provide the SQLITE_IOCAP_POWERSAFE_OVERWRITE I/O capability, the SQLITE_POWERSAFE_OVERWRITE compile-time option, and the "psow=BOOLEAN" query parameter for URI filenames. * Added the sqlite3_db_release_memory() interface and the shrink_memory pragma. * Added the sqlite3_db_filename() interface. * Added the sqlite3_stmt_busy() interface. * Added the sqlite3_uri_boolean() and sqlite3_uri_int64() interfaces. * If the argument to PRAGMA cache_size is negative N, that means to use approximately -1024*N bytes of memory for the page cache regardless of the page size. * Enhanced the default memory allocator to make use of _msize() on windows, malloc_size() on Mac, and malloc_usable_size() on Linux. * Enhanced the query planner to support index queries with range constraints on the rowid. * Enhanced the query planner flattening logic to allow UNION ALL compounds to be promoted upwards to replace a simple wrapper SELECT even if the compounds are joins. * Enhanced the query planner so that the xfer optimization can be used with INTEGER PRIMARY KEY ON CONFLICT as long as the destination table is initially empty. * Enhanced the windows VFS so that all system calls can be overridden using the xSetSystemCall interface. * Updated the "unix-dotfile" VFS to use locking directories with mkdir() and rmdir() instead of locking files with open() and unlink(). * Enhancements to the test_quota.c extension to support stdio-like interfaces with quotas. * Change the unix VFS to be tolerant of read() system calls that return less then the full number of requested bytes. * Change both unix and windows VFSes to report a sector size of 4096 instead of the old default of 512. * In the TCL Interface, add the -uri option to the "sqlite3" TCL command used for creating new database connection objects. * Added the SQLITE_TESTCTRL_EXPLAIN_STMT test-control option with the SQLITE_ENABLE_TREE_EXPLAIN compile-time option to enable the command-line shell to display ASCII-art parse trees of SQL statements that it processes, for debugging and analysis. * Bug fix: Add an additional xSync when restarting a WAL in order to prevent an exceedingly unlikely but theoretically possible database corruption following power-loss. * Bug fix: Change the VDBE so that all registers are initialized to Invalid instead of NULL. * Bug fix: Fix problems that can result from 32-bit integer overflow. |
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