greenplum数据导入导出

简介

一、数据导入
greenplum数据导入有五种方式：

1、 insert：通过sql直接插入数据

2.、copy：通过master节点加载，无法实现并行高效数据加载
copy tablename from ‘/home/…/test.cvs’ with delimiter ‘,’;

3.、外部表：
创建外部表，然后插入数据

4.、gpload：外部表的封装
通过编辑gpload控制文件test.yml完成导入
gpload -f test.yml

5.、可执行外部表：不需要启动gpfdist服务
create external web table test1(…)
execute ‘cat /home/…/test.dat’ on master
format ‘text’ (delimiter ‘,’ null as ‘’ escape ‘off’)
encoding ‘’;
insert into test select * from test1;

二、数据导出：
1、copy命令导出

2、可写外部表导出数据：
create writable external table test1
(like test)
location (‘gpfdist://localhost:8888/test.dat’)
format ‘text’ (delimiter ‘,’)
distribute by …;
insert into test1 select * from test;

3、通过 pg_dump导出
pg_dump -f basicmod.sql -h hostname -U username -s -n schema_name db_name # -s 代表只导出schema元信息，不包括数据

4、通过psql进行数据库导出 –
psql “host=XX.XX.XX.XX port=5432 user=XXX password=XXX dbname=XXX” -f table_name.sql

使用copy导出

1、使用navicat工具

1）选择所要导出库，右键点击选择“命令列界面”
2）步骤如下：

db_name=# show server_encoding;
 server_encoding
-----------------
 UTF8
(1 row)

SHOW
db_name=# show client_encoding;
 client_encoding
-----------------
 UNICODE
(1 row)

SHOW
db_name=# 
db_name=# set client_encoding to utf8;
SET

db_name=# COPY schema_name.test_03(tjriqi,zhangh,id,name,description,amount,balance,last_balance,kehhao,jiejuh,yuangh,guiyul,shijch,create_time,create_user,modify_time,time_diff,check_time,submit_time) TO '/test_exp/schema_name_test_03.txt' with DELIMITER '&' null as '' ;
COPY 7
db_name=# COPY schema_name.test_05(id,numb,bignumb,amout,balance) TO '/test_exp/schema_name_test_05.txt' with DELIMITER '&' null as '' ;
COPY 3

db_name=# 

2、使用PG SQL客户端

cmd
chdir /d D:\Program Files\PG SQL\bin
psql -d dbname -h 10.110.1.11 -p 5432 -U gpadmin -w
show server_encoding;
show client_encoding;
set client_encoding to utf8;
\copy (select jigdma||'!',jgmngc||'!',kehhao||'!',kehmch||'!',zhangh||'!',huobdh||'!',hrjine||'!',hcjine||'!',yewupz||'!',hklxin||'!',qsfshi||'!',wbzkzh||'!',hukurq||'!',sbdate||'!',sbtime||'!',sbjigo||'!',cxbzhi||'!',cxtime||'!',status||'!',id||'!',remark||'!',del_flag||'!',create_user||'!',create_time||'!',modified_user||'!',modified_time||'!',check_user||'!',check_time||'!',beizhu||'!',coalesce(cast(ryname as text),'') from schemaname.tablename) TO 'D:\test\00EXPDATA\tablename.txt' with DELIMITER '^' null as '!' ;