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## SQLite Release 3.6.18 On 2009-09-11

- Versioning of the SQLite source code has transitioned from CVS to Fossil.
- Query planner enhancements.
- The SQLITE_ENABLE_STAT2 compile-time option causes the ANALYZE command to collect a small histogram of each index, to help SQLite better select among competing range query indices.
- Recursive triggers can be enabled using the PRAGMA recursive_triggers statement.
- Delete triggers fire when rows are removed due to a REPLACE conflict resolution. This feature is only enabled when recursive triggers are enabled.
- Added the SQLITE_OPEN_SHAREDCACHE and SQLITE_OPEN_PRIVATECACHE flags for sqlite3_open_v2() used to override the global shared cache mode settings for individual database connections.
- Added improved version identification features: C-Preprocessor macro SQLITE_SOURCE_ID, C/C++ interface sqlite3_sourceid(), and SQL function sqlite_source_id().
- Obscure bug fix on triggers ([efc02f9779]).

A complete list of SQLite releases in a single page and a chronology are both also available. A detailed history of every check-in is available at SQLite version control site.