# Namespace OptimaJet.Workflow.DbPersistence ## Classes - [ColumnInfo](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/ColumnInfo/) - [DBColumnsExtensions](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/DBColumnsExtensions/) - [DbObject](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/DbObject-TEntity/) - [Extensions](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/Extensions/) - [FileSchemePersistenceMSSQLProvider](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/FileSchemePersistenceMSSQLProvider/) - [MSSQLProvider](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/MSSQLProvider/) - [ProcessInstanceTree](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/ProcessInstanceTree/) - [WorkflowApprovalHistory](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowApprovalHistory/) - [WorkflowGlobalParameter](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowGlobalParameter/) - [WorkflowInbox](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowInbox/) - [WorkflowProcessInstance](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowProcessInstance/) - [WorkflowProcessInstancePersistence](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowProcessInstancePersistence/) - [WorkflowProcessInstanceStatus](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowProcessInstanceStatus/) - [WorkflowProcessScheme](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowProcessScheme/) - [WorkflowProcessTimer](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowProcessTimer/) - [WorkflowProcessTransitionHistory](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowProcessTransitionHistory/) - [WorkflowScheme](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/WorkflowScheme/)