datax抄写oracle抛出错误ORA-32795说明

1.在使用datax抄写的时候出现如下抛错：

2021-10-29 15:49:01.201 [0-0-0-writer] WARN  CommonRdbmsWriter$Task - 回滚此次写入, 采用每次写入一行方式提交. 因为:ORA-32795: cannot insert into a generated always identity column
2021-10-29 15:49:01.205 [0-0-0-writer] ERROR StdoutPluginCollector - 
java.sql.SQLException: ORA-32795: cannot insert into a generated always identity column

2.查看表结构

create table hbhe.T1
(
  type    VARCHAR2(20) not null,
  subject VARCHAR2(200),
  od_date DATE not null,
  id      NUMBER(18) generated always as identity (start with 1)
)
tablespace hbhe_T1_TBS
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 80K
    next 1M
    minextents 1
    maxextents unlimited
  );
-- Add comments to the columns 
comment on column hbhe.t1.type
  is '0：为假日工作，1为工作日放假';
-- Create/Recreate indexes 
create unique index hbhe.t1_PK1 on hbhe.t1 (ID)
  tablespace hbhe_DATA_TBS
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );
-- Create/Recreate primary, unique and foreign key constraints 
alter table hbhe.t1
add constraint t1_PK primary key (ID);

3.禁用identity

alter table T1 modify id drop identity;

4.如果需要添加

alter table hbhe.t1 modify id generated always as identity;

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oracle,linux