User`s guide

On some occasions, you might want to unmap or unlink report and database fields that you have already
mapped. For example, you might mistakenly map the wrong fields or want to map a report field to a
database field that you have already mapped. In these cases, you can select a report field in the lower
boxes (the program then automatically selects the database field) and click Unmap. The field names
will move from the lower boxes to the upper boxes.
Note:
Crystal Reports does not automatically refresh the report data when you close the Map Fields dialog
box. To refresh your data, click Refresh on the Standard toolbar.
23.7.2 Remapping processes
If you make changes to the active database or universe fields that require you to remap the corresponding
report fields, you can display the Map Fields dialog box by choosing any of these commands from the
Database menu:
• Verify Database
• Verify on First Refresh
• Set Datasource Location
Note:
There is also a global option called Verify When Database Driver Upgraded (set on Database tab of
the Options dialog box) that can make the Map Fields dialog box appear when you first refresh a report's
data after updating its database driver.
You can use each of these commands for a specific function; however, any of these commands will
open the Map Fields dialog box if the program detects a mismatch between the field names in the report
and the field names in the database or universe. In order to detect any possible mismatches, the program
checks each field name in the report against the field names in the database or universe. If one of the
field names does not match any of the field names in the database or universe, the Map Fields dialog
box appears.
Note:
Report fields that are left unmapped are removed from the report.
23.7.2.1 Using the Verify Database process
When you choose Verify Database from the Database menu, the program checks the active databases
or universes, and reports. If it detects changes, the report must be adapted to prevent errors.
The program displays the Map Fields dialog box when it detects either of these types of changes to the
database or universe:
2012-03-14548
Understanding Databases