Modifying Database Files (dbmodify)
dbmodify changes the data in a file based on the instructions in a field assignment file.
At a Landmark command prompt, type
dbmodify [-bBq] -A FieldAssignmentFile [-f "FilterString"] [-i IndexName] [--threads n] DataArea [Module|File [...]]
Consider the following
| Program Option | Description |
|---|---|
b |
Brief mode - do not display progress while the copy is in operation. |
q |
Quiet mode (do not print informational messages) |
A FieldAssignmentFile |
Use information in a specified file to change field or file names, or initialize field values in the destination file. FieldAssignmentFile is the Field assignment file name. |
B |
Use the business class parser when filtering. The default is to parse against the dictionary -B rather than the business class spec repository. However, if filtering on such things as derived fields, the business class parser may be necessary. |
i IndexName |
Exports the data using an index sequence (for example, -iGLMSET1). The index name must follow the -i. |
f "FilterString" |
Limit the output based on the specified filter value for the index keys of the file. The filter can be a conditional expression, such as
- or -
For an example of a filter in a similar command, see Example: Displaying a Field's Data Using a Filter . |
--threads n |
Run the dbmodify with the specified number of threads. If you use multiple threads, you may see a performance improvement. However, performance is dependent on other factors as well. Note also that a very large table will be processed in a single thread. |
DataArea [Module [...]] [File [...]] |
Specify the module(s) and/or file(s) that you want to export. |