http://www.diybl.com/course/3_program/java/javajs/2008429/111906.html
如果要使用池的话,就必须使用OracleConnectionCacheImpl,共有三种池的策略:
DYNAMIC_SCHEME(是动态增加.用完如果超过上限则关掉)
The cache will create connections above the specified maximum limit
when necessary but will in turn close connections as they are
returned to the cache until the number of connections is within the
maximum limit. Connections will never be cached above the maximum
limit. This is the default setting.
FIXED_RETURN_NULL_SCHEME (直接返回Null)
The cache will return a null connection once the maximum connection limit has been exceeded.
FIXED_WAIT_SCHEME (始终等待)
The cache will wait until there is a connection available and will then return it to the calling application.
oracle.jdbc.pool
Class OracleConnectionCacheImpl
http://download.oracle.com/otn/utilities_drivers/jdbc/101020/javadoc/index.html
oracle Javadoc JDBC 11.2.0.1
http://publish.it168.com/2005/1215/20051215001801.shtml
OC4J 10g 10.1.3 数据源中的连接高速缓存
在Oracle8i或以上版本中，可以创建以下两种临时表：
1。会话特有的临时表
CREATE GLOBAL TEMPORARY <TABLE_NAME> (<column specification>)
ON COMMIT PRESERVE ROWS；
2。事务特有的临时表
CREATE GL ......
