数据仓库服务 GAUSSDB(DWS)-CREATE FOREIGN TABLE (GDS导入导出):示例

时间：2025-01-08 11:12:39

示例

创建外表customer_ft，用来以TEXT格式导入GDS服务器10.10.123.234上的数据：

  
   
     
     
       CREATE FOREIGN TABLE customer_ft
(
    c_customer_sk             integer               ,
    c_customer_id             char(16)              ,
    c_current_cdemo_sk        integer               ,
    c_current_hdemo_sk        integer               ,
    c_current_addr_sk         integer               ,
    c_first_shipto_date_sk    integer               ,
    c_first_sales_date_sk     integer               ,
    c_salutation              char(10)              ,
    c_first_name              char(20)              ,
    c_last_name               char(30)              ,
    c_preferred_cust_flag     char(1)               ,
    c_birth_day               integer               ,
    c_birth_month             integer               ,
    c_birth_year              integer                       ,
    c_birth_country           varchar(20)                   ,
    c_login                   char(13)                      ,
    c_email_address           char(50)                      ,
    c_last_review_date        char(10)
)
    SERVER gsmpp_server
    OPTIONS
(
    location 'gsfs://10.10.123.234:5000/customer1*.dat',
    FORMAT 'TEXT' ,
    DELIMITER '|',
    encoding 'utf8',
    mode 'Normal')
READ ONLY;

      

    

  
 

创建外表foreign_HR_staffS_ft，用来以TEXT格式导入GDS服务器192.168.0.90和192.168.0.91上的数据，导入过程错误信息将记录到err_HR_staffS中。本次数据导入允许出现的数据格式错误个数为2。

  
       CREATE FOREIGN TABLE foreign_HR_staffS_ft
(
  staff_ID       NUMBER(6) ,
  FIRST_NAME     VARCHAR2(20),
  LAST_NAME      VARCHAR2(25),
  EMAIL          VARCHAR2(25),
  PHONE_NUMBER   VARCHAR2(20),
  HIRE_DATE      DATE,
  employment_ID  VARCHAR2(10),
  SALARY         NUMBER(8,2),
  COMMISSION_PCT NUMBER(2,2),
  MANAGER_ID     NUMBER(6),
  section_ID  NUMBER(4)
) SERVER gsmpp_server OPTIONS (location 'gsfs://192.168.0.90:5000/* | gsfs://192.168.0.91:5000/*', format 'TEXT', delimiter E'\x08',  null '',reject_limit '2') WITH err_HR_staffS_ft;

建立外表，用来以 CS V格式导入input_data目录下存放在各个节点名文件下的所有文件。

  
       CREATE FOREIGN TABLE foreign_HR_staffS_ft1
(
  staff_ID       NUMBER(6) ,
  FIRST_NAME     VARCHAR2(20),
  LAST_NAME      VARCHAR2(25),
  EMAIL          VARCHAR2(25),
  PHONE_NUMBER   VARCHAR2(20),
  HIRE_DATE      DATE,
  employment_ID  VARCHAR2(10),
  SALARY         NUMBER(8,2),
  COMMISSION_PCT NUMBER(2,2),
  MANAGER_ID     NUMBER(6),
  section_ID     NUMBER(4)
) SERVER gsmpp_server OPTIONS (location 'file:///input_data/*', format 'csv', quote E'\x08', mode 'private', delimiter ',') WITH err_HR_staffS_ft1;

建立外表，用来以CSV格式导出数据到output_data目录下。

  
       CREATE FOREIGN TABLE foreign_HR_staffS_ft2
(
  staff_ID       NUMBER(6) ,
  FIRST_NAME     VARCHAR2(20),
  LAST_NAME      VARCHAR2(25),
  EMAIL          VARCHAR2(25),
  PHONE_NUMBER   VARCHAR2(20),
  HIRE_DATE      DATE,
  employment_ID  VARCHAR2(10),
  SALARY         NUMBER(8,2),
  COMMISSION_PCT NUMBER(2,2),
  MANAGER_ID     NUMBER(6),
  section_ID  NUMBER(4)
) SERVER gsmpp_server OPTIONS (location 'file:///output_data/', format 'csv', quote E'\x08', delimiter '|', header 'on') WRITE ONLY;