SQLITE源码剖析(11)

娟斌心

　　声明：本SQLite源码剖析系列为刘兴(http://deepfuture.iyunv.com/)原创，未经笔者授权，任何人和机构不能转载
　　**应用程序必须在关闭sqlite3对象前，[sqlite3_finalize | finalize]
　　**所有的与该对象相关的[prepared statements]，必须[sqlite3_blob_close | **close]所有的与该对象相关的
　　**[BLOB handles] (BLOB大二进制句柄)
　　** Applications must [sqlite3_**finalize | finalize] all [prepared statements]
　　** and [sqlite3_blob_close | close] all [BLOB handles] associated with
　　** the [sqlite3] object prior to attempting to close the object.  ^If
　　** sqlite3_close() is called on a [database connection] that still has
　　** outstanding [prepared statements] or [BLOB handles], then it returns
　　** SQLITE_BUSY.
　　**如果sqlite3_close()在[database connection]数据库连接被调用，该数
　　**据库连接中仍有显式的[prepared statements][BLOB handles]，则返回
　　**SQLITE_BUSY。当事务打开时，调用sqlite3_close()，事务自动回滚。
　　** ^If [sqlite3_close()] is invoked while a transaction is open,
　　** the transaction is automatically rolled back.
　　**sqlite3_close(C)的C参数可以是NULL指针或从sqlite3_open()、sqlite3_**open16()、sqlite3_open_v2()获取的[sqlite3]对象指针
　　**使用NULL参数调用sqlite3_close()为没负作用的空操作
　　** The C parameter to [sqlite3_close(C)] must be either a NULL
　　** pointer or an [sqlite3] object pointer obtained
　　** from [sqlite3_open()], [sqlite3_open16()], or
　　** [sqlite3_open_v2()], and not previously closed.
　　** ^Calling sqlite3_close() with a NULL pointer argument is a 
　　** harmless no-op.
　　*/
　　SQLITE_API int sqlite3_close(sqlite3 *);