Currently in the usage information for the RepairGeometry_management geoprocessing tool..."Valid inputs are shapefiles, personal and file geodatabase feature classes." We recently had an ESRI tech support incident that found that null geometries in our polygon SDE feature classes degraded performance significantly. The current ESRI suggested workflow to repair these SDE feature class geometries is to export the feature class into a file geodatabase, run the repair geometry geoprocessing tool, and then reimport into SDE. It would be beneficial to have the repair geometry tool accept an SDE feature class as a valid input in order to avoid the additional workflow.
This Idea has been marked as a duplicate of Enable Repair Geometry tool for ArcSDE geodatabases by Nana Dei. Please consider voting on this Idea.