Oracle怎么迁移数据到Greenplum

这篇文章主要介绍“Oracle怎么迁移数据到Greenplum”，在日常操作中，相信很多人在Oracle怎么迁移数据到Greenplum问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”Oracle怎么迁移数据到Greenplum”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

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端表结构

SQL> select dbms_metadata.get_ddl('TABLE','TAB_ORA','ZWC') from dual;

CREATE TABLE "ZWC"."TAB_ORA"

( "ID" NUMBER,

"OWNER" VARCHAR2(30),

"NAME" VARCHAR2(128),

CONSTRAINT "PK_ID" PRIMARY KEY ("ID")

USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS

STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645

PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1

BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)

TABLESPACE "USERS" ENABLE

) SEGMENT CREATION IMMEDIATE

PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255

NOCOMPRESS LOGGING

STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645

PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1

BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)

TABLESPACE "USERS"

使用sqluldr工具导出Oracle表数据

[oracle@ggos ~]$ ./sqluldr zwc/zwc@oraprod query="select * from tab_ora" field=0x7c records=0x0d0x0a charset=gbk file=tab_ora.csv head=off

0 rows exported at 2013-12-04 22:08:14, size 0 MB.

87975 rows exported at 2013-12-04 22:08:14, size 3 MB.

output file tab_ora.csv closed at 87975 rows, size 3 MB.

[oracle@ggos ~]$ more tab_ora.csv

20|SYS|ICOL$

46|SYS|I_USER1

28|SYS|CON$

15|SYS|UNDO$

29|SYS|C_COBJ#

3|SYS|I_OBJ#

25|SYS|PROXY_ROLE_DATA$

41|SYS|I_IND1

54|SYS|I_CDEF2

40|SYS|I_OBJ5

26|SYS|I_PROXY_ROLE_DATA$_1

17|SYS|FILE$

13|SYS|UET$

9|SYS|I_FILE#_BLOCK#

43|SYS|I_FILE1

51|SYS|I_CON1

38|SYS|I_OBJ3

7|SYS|I_TS#

56|SYS|I_CDEF4

19|SYS|IND$

14|SYS|SEG$

6|SYS|C_TS#

44|SYS|I_FILE2

21|SYS|COL$

.......................................

GP端创建表

[gpadmin@mdw gpseg-1]$ psql -h 192.168.1.23 -d zwcdb -U zhongwc -W

Password for user zhongwc:

psql (8.2.15)

Type "help" for help.

zwcdb=# create table tab_gp(

zwcdb(# id integer primary key,

zwcdb(# owner varchar(200),

zwcdb(# name varchar(200)

zwcdb(# );

NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "tab_gp_pkey" for table "tab_gp"

CREATE TABLE

zwcdb=# \d+ tab_gp

Table "public.tab_gp"

Column | Type | Modifiers | Storage | Description

--------+------------------------+-----------+----------+-------------

id | integer | not null | plain |

owner | character varying(200) | | extended |

name | character varying(200) | | extended |

Indexes:

"tab_gp_pkey" PRIMARY KEY, btree (id)

Has OIDs: no

Distributed by: (id)

导入数据

zwcdb=# copy tab_gp from '/tmp/tab_ora.csv' delimiter '|';

COPY 87975

zwcdb=# select count(*) from tab_gp;

count

-------

87975

(1 row)

zwcdb=# select * from tab_gp;

id | owner | name

-------+--------------------+--------------------------------

15 | SYS | UNDO$

29 | SYS | C_COBJ#

3 | SYS | I_OBJ#

25 | SYS | PROXY_ROLE_DATA$

41 | SYS | I_IND1

17 | SYS | FILE$

13 | SYS | UET$

9 | SYS | I_FILE#_BLOCK#

43 | SYS | I_FILE1

51 | SYS | I_CON1

7 | SYS | I_TS#

19 | SYS | IND$

21 | SYS | COL$

45 | SYS | I_TS1

35 | SYS | I_UNDO2

5 | SYS | CLU$

23 | SYS | PROXY_DATA$

47 | SYS | I_USER2

49 | SYS | I_COL2

37 | SYS | I_OBJ2

39 | SYS | I_OBJ4

57 | SYS | I_CCOL1

59 | SYS | BOOTSTRAP$

33 | SYS | I_TAB1

31 | SYS | CDEF$

53 | SYS | I_CDEF1

55 | SYS | I_CDEF3

11 | SYS | I_USER#

27 | SYS | I_PROXY_ROLE_DATA$_2

61 | SYS | OBJAUTH$

63 | SYS | I_OBJAUTH2

65 | SYS | I_UGROUP1

67 | SYS | TSQ$

69 | SYS | VIEW$

71 | SYS | SUPEROBJ$

73 | SYS | I_SUPEROBJ2

75 | SYS | I_VIEW1

77 | SYS | I_SYN1

79 | SYS | I_SEQ1

81 | SYS | I_LOB1

83 | SYS | COLTYPE$

85 | SYS | I_COLTYPE2

zwcdb=# select gp_segment_id,count(*) from tab_gp group by gp_segment_id;

gp_segment_id | count

---------------+-------

1 | 43982

0 | 43993

(2 rows)

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