§18.6.1 触发器数据字典.................................................................................................325
§18.6.2 无效触发器的编译.............................................................................................326
第十九章 外部存储过程.................................................................................................................327
§19.1 什么是外部例程.............................................................................................................327
§19.2 C 外部例程.....................................................................................................................327
§19.2.1 调用步骤..............................................................................................................329
§19.2.2 参数映射( 转换)..................................................................................................334
第二十章 会话间通信与警告.........................................................................................................336
§20.1 DBMS_PIPE 包..............................................................................................................336
§20.1.1 发送消息..............................................................................................................336
§20.1.2 接收消息..............................................................................................................337
§20.1.3 示例......................................................................................................................338
§20.2 DBMS_ALERT 包..........................................................................................................357
§20.2.1 使用警告..............................................................................................................358
§20.2.2 警告所用的各个过程.........................................................................................358
§20.2.3 警告例子..............................................................................................................360
§20.3 DBMS_PIPE 和 DBMS_ALERT 差别..........................................................................360
第二十一章 数据库作业和文件 I/O...............................................................................................361
§21.1 数据库作业与 DBMS_JOB 包......................................................................................361
§21.1.1 后台进程..............................................................................................................361
§21.1.2 运行作业方法.....................................................................................................362
§21.1.3 DBMS_JOB 包所包含的程序-...........................................................................365
§21.1.4 失效作业..............................................................................................................369
§21.1.5 删除作业..............................................................................................................370
§21.1.6 修改作业参数.....................................................................................................371
§21.1.7 与作业参数有关数据字典.................................................................................373
§21.2 文件 I/O...........................................................................................................................374
§21.2.1 安全性..................................................................................................................374
§21.2.2 打开和关闭文件.................................................................................................375
§21.2.3 文件输出..............................................................................................................376
§21.2.3 文件输入..............................................................................................................378
§21.2.4 文件操作例子......................................................................................................378
第二十二章 在 PL/SQL 使用 SQL 语句.........................................................................................379
§22.1 在 PL/SQL 使用 DML 语句...........................................................................................379
§22.2 伪列.................................................................................................................................381
§22.3 GRANT、REVOKE 和权限.........................................................................................382
§22.3.1 对象和系统权限.................................................................................................382
§22.3.2 GRANT 和 REVOKE 命令语法.........................................................................382
§22.4 事务控制.........................................................................................................................383
§22.4.1 COMMIT 和 ROLLBACK.................................................................................383
§22.4.2 保留点 SAVEPOINT..........................................................................................384
§22.5 在 PL/SQL 中使用 SQL 函数........................................................................................385
§22.5.1 错误处理函数.....................................................................................................387
§22.5.2 数字函数..............................................................................................................387