尝试插入schema.table.ID时ORA-01400

Question

我有一张表存储被拒绝的合同提案.

CREATE TABLE "STATUS_CONTRATO" (
  "STC_ID" NUMBER NOT NULL,
  "CTB_CONTRATO" NUMBER NOT NULL,
  "STC_DATA" DATE NOT NULL,
  "STC_OBSERVACAO" VARCHAR2(200) NOT NULL,
  CONSTRAINT "STATUS_CONTRATO_PK" 
    PRIMARY KEY ( "STC_ID") 
    ENABLE 
    VALIDATE,
  CONSTRAINT "FK_CONTRATO" 
    FOREIGN KEY ( "CTB_CONTRATO")
       REFERENCES "CONTRATO" ( CTB_CONTRATO) 
       ON DELETE SET NULL 
    ENABLE 
    VALIDATE)
;

(Visual Studio 2010生成的脚本)

该表有一个简单的Trigger,其值STC_ID设置为:

TRIGGER "STATUS_CONTRATO_TRIGGER1"
  BEFORE
  INSERT
  ON "STATUS_CONTRATO"
  FOR EACH ROW

when (new.STC_ID = 0)
DECLARE
BEGIN 
  SELECT SEQ_STATUS_ID.NEXTVAL INTO :NEW.STC_ID FROM DUAL;
END;

SEQ_STATUS_ID 是一个简单的序列.

这是我的问题:

我可以在VS2010查询窗口中成功执行此插入:

insert into myschema.STATUS_CONTRATO s(
  s.STC_ID, s.CTB_CONTRATO, s.STC_DATA, s.STC_OBSERVACAO
)values(
  0, 10, SYSDATE, 'Inserting by hand works'
);

但是,当我尝试使用EF插入时,我遇到了这个异常:

System.Data.UpdateException: An error occurred while updating the entries. 
See the inner exception for details. ---> Oracle.DataAccess.Client.OracleException: 
ORA-01400: cannot insert NULL into ("MYSCHEMA"."STATUS_CONTRATO"."STC_ID")
ORA-06512: at line 4

我正在使用此代码插入

STATUS_CONTRATO statusContrato = new STATUS_CONTRATO() {
    STC_ID = 0,
    CTB_CONTRATO = codContrato,
    STC_DATA = DateTime.Today,
    STC_OBSERVACAO = observacao
};
ent.STATUS_CONTRATO.AddObject(statusContrato);
ent.SaveChanges();

我正在使用VS2010,Oracle 11g(CentOS服务器),ODP.NET客户端11.2.0.3.0生产,.NET Framework 4.0,EF 4.

Answer 1

检查一下：http://www.oracle.com/technetwork/issue-archive/2011/11-sep/o51odt-453447.html

特别是“触发器和序列”部分

从“工具”菜单中，选择“运行 SQL Plus 脚本”。浏览到提取代码和脚本的位置，选择 triggers.sql 脚本，从列表中选择 HR 连接，然后单击运行。每当为该值传入 NULL 时，由脚本创建的 INSERTEMPLOYEES 触发器都会为 EMPLOYEE_ID 生成一个新序列......