Home > Workflows > Using Workflows > Component Palette > Node Overview > Refresh a Node
Nodes such as Data Source node, Update Table node, and Model node rely on database resources for their definition. It may be necessary to refresh a node definition if the database resources change (for example, if the resources are deleted or recreated).
To refresh a node, go to the Property Inspector for the node; move to the appropriate tab:
Models tab for a Model node
Columns tab for an Update Table or Data Source node
then click
Data Miner connects to the database and validates the attributes or models. The status of the attribute or model status is set to either valid or invalid. Valid items have no mark associated with them. Invalid items are marked with error
or warning
If the source table is no longer present, Data Miner displays a dialog that tells you about the missing table, and allows you to select another table, or to cancel. Cancel leaves the node in the state prior to refresh operation. In a similar way, you are given the option of replacing a missing attribute.
For Model nodes, the node becomes invalid if a model if found to be invalid. The node cannot be run until you make the node valid again. If the model has been recreated, you can make the node valid by simply clicking the model refresh button on the Property Inspector models tool bar.
If the Model node is run and the server determines that the model is missing, the node is set to error and can be rerun after the missing model is replaced.