bitwarden-server/util/Migrator/DbScripts/2020-06-23_00_OrgIdentifier.sql

IF COL_LENGTH('[dbo].[Organization]', 'Identifier') IS NULL
BEGIN
    ALTER TABLE
        [dbo].[Organization]
    ADD
        [Identifier] NVARCHAR (50) NULL
END
GO

IF NOT EXISTS (
    SELECT * FROM sys.indexes  WHERE [Name]='IX_Organization_Identifier'
    AND object_id = OBJECT_ID('[dbo].[Organization]')
)
BEGIN
    CREATE UNIQUE NONCLUSTERED INDEX [IX_Organization_Identifier]
        ON [dbo].[Organization]([Identifier] ASC)
        WHERE [Identifier] IS NOT NULL;
END
GO