在 Microsoft Oslo SDK CTP 2008(使用 Intellipad)中,以下代码编译良好:
module T {
type A {
Id : Integer32 = AutoNumber();
} where identity Id;
As : A*;
type B {
Id : Integer32 = AutoNumber();
// A : A;
// } where A in As && identity Id;
} where identity Id;
Bs : B*;
type C {
Id : Integer32 = AutoNumber();
B : B;
} where B in Bs && identity Id;
Cs : C*;
}
并导致以下到达 SQL 输出:
set xact_abort on;
go
begin transaction;
go
set ansi_nulls on;
go
create schema [T];
go
create table [T].[As]
(
[Id] int not null identity,
constraint [PK_As] primary key clustered ([Id])
);
go
create table [T].[Bs]
(
[Id] int not null identity,
constraint [PK_Bs] primary key clustered ([Id])
);
go
create table [T].[Cs]
(
[Id] int not null identity,
[B] int not null,
constraint [PK_Cs] primary key clustered ([Id]),
constraint [FK_Cs_B_T_Bs] foreign key ([B]) references [T].[Bs] ([Id])
);
go
commit transaction;
go
但是在将模块 T 中的注释行更改如下
A : A;
} where A in As && identity Id;
// } where identity Id;
显示错误消息“M2037: SQL Generation Internal Error: Missing generator for variable 'A'”(在 Intellipad 的 Reach SQL 窗口中)。
有任何想法吗?
问候,坦伯格