3.3.3. MS SQL Server Specifics

Microsoft SQL Server uses cluster indexes for tables.

By default, a clustered index is based on the table’s primary key, however, keys of the UUID type used by CUBA applications are poorly suited for clustered indexes. We recommend creating UUID primary keys with the nonclustered modificator:

create table SALES_CUSTOMER (
    ID uniqueidentifier not null,
    CREATE_TS datetime,
    primary key nonclustered (ID)