Reloading Definitions from a Database - 6.3

Talend Data Mapper User Guide

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Often the database will have changed and you need to get the current table definitions. To do this, simply right-click the database object and select [Re]Load Table Definitions. This will recreate all of the database structures from their current values. It will recreate the structures in place so it will not disturb any other structures or maps that depend on these. If there are changes, these changes will be automatically seen by the maps that depend on them.