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中文
  • PowerCenter 10.4.0
  • 所有产品

目录

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  1. 前言
  2. 使用转换
  3. 汇总器转换
  4. 自定义转换
  5. 自定义转换函数
  6. 数据屏蔽转换
  7. 数据屏蔽示例
  8. 表达式转换
  9. 外部过程转换
  10. 筛选器转换
  11. HTTP 转换
  12. Identity Resolution 转换
  13. Java 转换
  14. Java 转换 API 引用
  15. Java 表达式
  16. Java 转换示例
  17. 联接器转换
  18. 查找转换
  19. 查找缓存
  20. 动态查找缓存
  21. 规范器转换
  22. 等级转换
  23. 路由器转换
  24. 序列生成器转换
  25. 排序器转换
  26. 源限定符转换
  27. SQL 转换
  28. 在映射中使用 SQL 转换
  29. 存储过程转换
  30. 事务控制转换
  31. 联合转换
  32. 非结构化数据转换
  33. 更新策略转换
  34. XML 转换

转换指南

转换指南

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Informix

Informix

在 Informix 中，声明输出参数的语法与其他数据库不同。对于大多数数据库，使用 IN 或 OUT 声明变量以指定是否将该变量用作输入或输出参数。Informix 使用关键字 RETURNING，使得输入/输出参数和返回值难以区分。例如，使用 RETURN 命令返回一个或多个输出参数： 
CREATE PROCEDURE GET_NAME_USING_ID (nID integer) 
RETURNING varchar(20);
define nID integer;
define outVAR as varchar(20);
SELECT FIRST_NAME INTO outVAR FROM CONTACT WHERE ID = nID
return outVAR;
END PROCEDURE;
请注意，这种情况下，RETURN 语句传递 outVAR 的值。但与其他数据库不同的是，outVAR 不是返回值，而是输出参数。将按以下方式返回多个输出参数： 
return outVAR1, outVAR2, outVAR3
Informix 确实会传递返回值。返回值不是用户定义的，而是生成为错误检查值。在转换中，必须检查 R 值。