§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.....................................................................................................................328
§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.....................................................................................................................336
§20.1 DBMS_PIPE...................................................................................................................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...............................................................................................................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...................................................................................361
第二十一章 数据库作业和文件 I/O...............................................................................................361
§21.1 数据库作业.....................................................................................................................361
§21.1.1 后台进程..............................................................................................................362
§21.1.2 运行作业..............................................................................................................362
§21.1.3 失效作业..............................................................................................................364
§21.1.4 删除作业..............................................................................................................365
§21.1.5 修改作业参数......................................................................................................366
§21.1.6 与作业参数有关数据字典.................................................................................368
§21.2 文件 I/O...........................................................................................................................368
§21.2.1 安全性..................................................................................................................369
§21.2.2 打开和关闭文件.................................................................................................369
§21.2.3 文件输出..............................................................................................................371
§21.2.3 文件输入..............................................................................................................372
§21.2.4 文件操作例子......................................................................................................372
第二十二章 在 PL/SQL 使用 SQL 语句.........................................................................................373
§22.1 在 PL/SQL 使用 DML 语句...........................................................................................373
§22.2 伪列.................................................................................................................................375
§22.3 GRANT、REVOKE 和权限.........................................................................................376
§22.3.1 对象和系统权限.................................................................................................376
§22.3.2 GRANT 和 REVOKE 命令语法.........................................................................377
§22.4 事务控制.........................................................................................................................377
§22.4.1 COMMIT 和 ROLLBACK.................................................................................378
§22.4.2 保留点 SAVEPOINT..........................................................................................378
§22.5 在 PL/SQL 中使用 SQL 函数........................................................................................380
§22.5.1 错误处理函数.....................................................................................................382
§22.5.2 数字函数..............................................................................................................382
第二十三章 PL/SQL 程序的测试和调试.......................................................................................383
§23.1 问题诊断.........................................................................................................................383