嵌入式数据库引擎，SQLite 3.8.0 发布

SQLite，是一款轻型的数据库，是遵守ACID的关联式数据库管理系统，它的设计目标是嵌入式的，而且目前已经在很多嵌入式产品中使用了它，它占用资源非常的低，在嵌入式设备中，可能只需要几百K的内存就够了。它能够支持Windows/Linux/Unix等等主流的操作系统，同时能够跟很多程序语言相结合，比如 Tcl、C#、PHP、Java等，还有ODBC接口。

SQLite 3.8.0 发布了，改进记录包括：

• Add support for partial indexes
• Cut-over to the next generation query planner for faster and better query plans.
• The EXPLAIN QUERY PLAN output no longer shows an estimate of the number of rows generated by each loop in a join.
• Added the FTS4 notindexed option, allowing non-indexed columns in an FTS4 table.
• Added the SQLITE_STMTSTATUS_VM_STEP option to sqlite3_stmt_status().
• Added the cache_spill pragma.
• Added the query_only pragma.
• Added the defer_foreign_keys pragma and the sqlite3_db_status(db, SQLITE_DBSTATUS_DEFERRED_FKS,...) C-language interface.
• Added the "percentile()" function as a loadable extension in the ext/misc subdirectory of the source tree.
• Added the SQLITE_ALLOW_URI_AUTHORITY compile-time option.
• Add the sqlite3_cancel_auto_extension(X) interface.
• A running SELECT statement that lacks a FROM clause (or any other statement that never reads or writes from any database file) will not prevent a read transaction from closing.
• Add the SQLITE_DEFAULT_AUTOMATIC_INDEX compile-time option. Setting this option to 0 disables automatic indices by default.
• Issue an SQLITE_WARNING_AUTOINDEX warning on the SQLITE_CONFIG_LOG whenever the query planner uses an automatic index.
• Added the SQLITE_FTS3_MAX_EXPR_DEPTH compile-time option.
• Added an optional 5th parameter defining the collating sequence to the next_char() extension SQL function.
• The SQLITE_BUSY_SNAPSHOT extended error code is returned in WAL mode when a read transaction cannot be upgraded to a write transaction because the read is on an older snapshot.
• Enhancements to the sqlite3_analyzer utility program to provide size information separately for each individual index of a table, in addition to the aggregate size.
• Allow read transactions to be freely opened and closed by SQL statements run from within the implementation of application-defined SQL functions if the function is called by a SELECT statement that does not access any database table.
• Disable the use of posix_fallocate() on all (unix) systems unless the HAVE_POSIX_FALLOCATE compile-time option is used.
• Update the ".import" command in the command-line shell to support multi-line fields and correct RFC-4180 quoting and to issue warning and/or error messages if the input text is not strictly RFC-4180 compliant.
• Bug fix: In the unicode61 tokenizer of FTS4, treat all private code points as identifier symbols.
• Bug fix: Bare identifiers in ORDER BY clauses bind more tightly to output column names, but identifiers in expressions bind more tightly to input column names. Identifiers in GROUP BY clauses always prefer output column names, however.
• Bug fixes: Multiple problems in the legacy query optimizer were fixed by the move to NGQP.
• SQLITE_SOURCE_ID: "2013-08-26 04:50:08 f64cd21e2e23ed7cff48f7dafa5e76adde9321c2"
• SHA1 for sqlite3.c: b7347f4b4c2a840e6ba12040093d606bd16ea21e

下载地址：sqlite-amalgamation-3080000.zip(1.37 MiB)