oracle优化(一) oracle数据库使用 TIMESTAMP(6)类型保存年月日时分秒

一 问题描述:

1.1 建表语句

-- drop datle 
drop table CMS_CHANNEL;

-- Create table
create table CMS_CHANNEL
(
  ID              NUMBER not null,
  PARENT_ID       NUMBER,
  NAME            VARCHAR2(100),
  KEYWORDS        VARCHAR2(100),
  CHANNEL_URL     VARCHAR2(500),
  OUT_SITE_URL    VARCHAR2(200),
  SHOW_POSTION    NUMBER,
  SHOW_LOCATION   NUMBER,
  STATUS          NUMBER,
  ACTION_FLAG     NUMBER,
  INDUSTRY_ID     NUMBER,
  ID_NO           VARCHAR2(50),
  
  LANGUAGE        NUMBER,
  CLIENT          NUMBER,
  CREATE_TIME     TIMESTAMP(6),
  UPDATE_TIME     TIMESTAMP(6)
) ;

-- Add comments to the table 
comment on table CMS_CHANNEL is '栏目管理表';

-- Add comments to the columns 
comment on column CMS_CHANNEL.ID is '栏目主键';
comment on column CMS_CHANNEL.PARENT_ID is '父栏目ID(根目录为0)';
comment on column CMS_CHANNEL.NAME is '栏目名称';
comment on column CMS_CHANNEL.KEYWORDS is '关键词';
comment on column CMS_CHANNEL.CHANNEL_URL is '栏目路径';
comment on column CMS_CHANNEL.OUT_SITE_URL is '站外路径';
comment on column CMS_CHANNEL.SHOW_POSTION is '显示顺序';
comment on column CMS_CHANNEL.SHOW_LOCATION is '显示位置';

comment on column CMS_CHANNEL.STATUS is '状态';
comment on column CMS_CHANNEL.ACTION_FLAG is '删除标识';
comment on column CMS_CHANNEL.INDUSTRY_ID is '行业类别';
comment on column CMS_CHANNEL.ID_NO is '栏目管理表ID编码';

comment on column CMS_CHANNEL.LANGUAGE is '语言';
comment on column CMS_CHANNEL.CLIENT is '显示的客户端';
comment on column CMS_CHANNEL.CREATE_TIME is '创建时间';
comment on column CMS_CHANNEL.UPDATE_TIME is '更新时间';


-- Create/Recreate primary, unique and foreign key constraints 
alter table CMS_CHANNEL
  add primary key (ID)
  using index 
  tablespace DSW
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    minextents 1
    maxextents unlimited
  );


-- Create sequence 
create sequence CMS_CHANNEL_SEQ
minvalue 1
maxvalue 999999999999999999999999999
start with 1
increment by 1
cache 20;

--Create trigger
create or replace trigger CMS_CHANNEL_TRI
  before insert on CMS_CHANNEL  
REFERENCING OLD AS "OLD" NEW AS "NEW" FOR EACH ROW
begin
    SELECT CMS_CHANNEL_SEQ.NEXTVAL INTO :NEW.ID FROM DUAL;
end;

二 项目启动后,页面显示

三 原因分析:

 3.1 先检查数据库保存的数据

3.2 查看mybatis配置

 

这边配置错了，故需要改成正确的配置为: