# Class Migration20CreateUniqueIndexes

OptimaJet.Workflow.SQLite.Migrations.Migration20CreateUniqueIndexes

Migration that creates unique indexes for the workflow engine tables.

Namespace: [OptimaJet.Workflow.SQLite.Migrations](https://api.workflowengine.io/sqlite/OptimaJet.Workflow.SQLite.Migrations/)

```csharp
[Migration(20, TransactionBehavior.Default, null)]
[WorkflowEngineMigration("OptimaJet.Workflow.SQLite.Scripts.CreateUniqueIndexes.sql")]
[ProductVersion("WorkflowEngine", "14.0.0")]
public class Migration20CreateUniqueIndexes : Migration, IMigration
```

## Type Hierarchy

-   [MigrationBase](https://github.com/fluentmigrator/fluentmigrator/blob/0374ce832784745ede9b0013fd3f83c6d9bb5a44/src/FluentMigrator/MigrationBase.cs)
    -   [Migration](https://github.com/fluentmigrator/fluentmigrator/blob/0374ce832784745ede9b0013fd3f83c6d9bb5a44/src/FluentMigrator/Migration.cs)
        -   Migration20CreateUniqueIndexes Current type
            -   Implemented interfaces
                -   [IMigration](https://github.com/fluentmigrator/fluentmigrator/blob/0374ce832784745ede9b0013fd3f83c6d9bb5a44/src/FluentMigrator.Abstractions/IMigration.cs)

## Attributes

-   `FluentMigrator.MigrationAttribute`: Attribute of type FluentMigrator.MigrationAttribute
-   `OptimaJet.Workflow.Migrator.WorkflowEngineMigrationAttribute`: Attribute of type OptimaJet.Workflow.Migrator.WorkflowEngineMigrationAttribute
-   `OptimaJet.Workflow.Migrator.ProductVersionAttribute`: Attribute of type OptimaJet.Workflow.Migrator.ProductVersionAttribute

## Methods

`public override void Up()` 

`public override void Down()` 

[Previous Migration15CreateCalendarNameColumn](https://api.workflowengine.io/sqlite/OptimaJet.Workflow.SQLite.Migrations/Migration15CreateCalendarNameColumn/) [Next Migration30CreateUniqueIndexes](https://api.workflowengine.io/sqlite/OptimaJet.Workflow.SQLite.Migrations/Migration30CreateUniqueIndexes/)