我有三张桌子。AvailableOptions 和 PlanTypeRef 与名为 AvailOptionPlanTypeAssoc 的 ManyToMany 关联表。修剪下来的架构看起来像这样
CREATE TABLE [dbo].[AvailableOptions](
[SourceApplication] [char](8) NOT NULL,
[OptionId] [int] IDENTITY(1,1) NOT NULL,
...
)
CREATE TABLE [dbo].[AvailOptionPlanTypeAssoc](
[SourceApplication] [char](8) NOT NULL,
[OptionId] [int] NOT NULL,
[PlanTypeCd] [char](2) NOT NULL,
)
CREATE TABLE [dbo].[PlanTypeRef](
[PlanTypeCd] [char](2) NOT NULL,
[PlanTypeDesc] [varchar](32) NOT NULL,
)
Java 代码看起来像这样。
//AvailableOption.java
@ManyToMany(cascade={CascadeType.ALL}, fetch=FetchType.EAGER)
@JoinTable(
name = "AvailOptionPlanTypeAssoc",
joinColumns = { @JoinColumn(name = "OptionId"),
@JoinColumn(name="SourceApplication")},
inverseJoinColumns=@JoinColumn(name="PlanTypeCd"))
List<PlanType> planTypes = new ArrayList<PlanType>();
//PlanType.java
@ManyToMany
@JoinTable(
name = "AvailOptionPlanTypeAssoc",
joinColumns = { @JoinColumn(name = "PlanTypeCd")},
inverseJoinColumns={@JoinColumn(name="OptionId"),
@JoinColumn(name="SourceApplication")})
List<AvailableOption> options = new ArrayList<AvailableOption>();
当在 AvailableOptions 上进行选择时会出现问题,它会重新连接到自身上。请注意回溯中的以下 SQL 代码。第二个内部连接应该在 PlanTypeRef 上。
SELECT t0.OptionId,
t0.SourceApplication,
t2.PlanTypeCd,
t2.EffectiveDate,
t2.PlanTypeDesc,
t2.SysLstTrxDtm,
t2.SysLstUpdtUserId,
t2.TermDate
FROM dbo.AvailableOptions t0
INNER JOIN dbo.AvailOptionPlanTypeAssoc t1
ON t0.OptionId = t1.OptionId AND t0.SourceApplication = t1.SourceApplication
INNER JOIN dbo.AvailableOptions t2
ON t1.PlanTypeCd = t2.PlanTypeCd
WHERE (t0.SourceApplication = ? AND t0.OptionType = ?)
ORDER BY t0.OptionId ASC, t0.SourceApplication ASC
[params=(String) testApp, (String) junit0]}