| Publisher | SAS Institute | ||
|---|---|---|---|
| Format | 91.5KB PDF | Date added | 28 Mar 2001 |
| Topics | Knowledge and Data Management | ||
| Downloads | 1048 | ||
A custom query tool written for a broad audience presents certain problems for the programmer. Some users are content with the point and click interface while power users want to type in code. In variable transformations such as logs and ratios, both approaches can result in errors if the data is at all dirty. The authors wanted to protect their system against mistakes in user-entered code as well as data problems, while still providing the flexibility of user defined variables. The new string functions rxparse and rxsubstr provide a clean approach to the problem that is easy to implement. This paper presents two SCL methods that utilize these functions to generate code-saving code: checks that prevent defined run-time errors.
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