Adding where condition into NHibernate update statements

MultitenantEntityPersister.cs

public class MultitenantEntityPersister : SingleTableEntityPersister
{
    public MultitenantEntityPersister(PersistentClass persistentClass, ICacheConcurrencyStrategy cache, ISessionFactoryImplementor factory, IMapping mapping)
        : base(persistentClass, cache, factory, mapping)
    {
    }

    protected override NHibernate.SqlCommand.SqlCommandInfo GenerateUpdateString(bool[] includeProperty, int j, bool useRowId)
    {
        var index = base.GetPropertyIndex("TenantId");
        foreach (bool p in includeProperty)
        {
            if (!p)
                index--;
        }
        var result = base.GenerateUpdateString(includeProperty, j, useRowId);

        var tenantWhereBuilder = new SqlStringBuilder();
        tenantWhereBuilder
            .Add(" AND ")
            .Add("TenantId")
            .Add(" = ")
            .Add(Parameter.WithIndex(index));

        result = new SqlCommandInfo(result.Text.Append(tenantWhereBuilder.ToSqlString()), result.ParameterTypes);
        return result;
    }
}