How To Convert A Partitioned Table To A Non-Partitioned Table Using DataPump In 11g (Doc ID 1276049.

Posted 2021-03-23 zylong-sys

How To Convert A Partitioned Table To A Non-Partitioned Table Using DataPump In 11g (Doc ID 1276049.1)

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GOAL

How to convert a partitioned table to a non-partitioned table using DataPump.  如何使用DataPump将分区表转换为非分区表

SOLUTION

A new import DataPump parameter PARTITION_OPTIONS has been introduced with 11g. The allowed values are:  
11g中引入了新的导入DataPump参数PARTITION_OPTIONS。允许的值为
NONE - Creates tables as they existed on the system from which the export operation was performed. This is the default value.
NONE - 创建表，该表存在于执行导出操作的系统上。这是默认值
DEPARTITION - Promotes each partition or subpartition to a new individual table. The default name of the new table will be the concatenation of the table and partition name or the table and subpartition name, as appropriate.
DEPARTITION - 将每个分区或子分区提升为新的单个表。 新表的默认名称将是表和分区名称或表和子分区名称的串联（视情况而定）。
MERGE - Combines all partitions and subpartitions into one table.
MERGE - 将所有分区和子分区合并到一个表中。
The parameter PARTITION_OPTIONS specifies how table partitions should be created during an import operation. To convert a partitioned table to a non-partitoned table we have to use PARTITION_OPTIONS=MERGE during the process of import.
参数 PARTITION_OPTIONS 指定在导入操作期间应如何创建表分区。要将分区表转换为非分区表，我们必须在导入过程中使用 PARTITION_OPTIONS = MERGE
The below example illustrates how to convert partitioned table to a non-partitioned table using expdp/impdp.
下面的示例说明了如何使用expdp / impdp将分区表转换为非分区表
1. Create a partitioned table and insert values into the partitioned table  创建一个分区表并将值插入该分区表

connect scott/<PASSWORD>
create table part_tab
(
   year    number(4),
   product varchar2(10),
   amt     number(10,2)
)
partition by range (year)
(
   partition p1 values less than (1992) tablespace u1,
   partition p2 values less than (1993) tablespace u2,
   partition p3 values less than (1994) tablespace u3,
   partition p4 values less than (1995) tablespace u4,
   partition p5 values less than (MAXVALUE) tablespace u5
);

select * from PART_TAB;

YEAR       PRODUCT    AMT
---------- ---------- ----------
      1992 p1                100
      1993 p2                200
      1994 p3                300
      1995 p4                400
      2010 p5                500

select OWNER, TABLE_NAME, PARTITIONED
from   dba_tables
where  table_name = ‘PART_TAB‘ and owner = ‘SCOTT‘;

OWNER                          TABLE_NAME PAR
------------------------------ ---------- ---
SCOTT                          PART_TAB   YES

select TABLE_OWNER, TABLE_NAME, PARTITION_NAME, TABLESPACE_NAME
from   dba_tab_partitions
where  TABLE_NAME = ‘PART_TAB‘ and TABLE_OWNER = ‘SCOTT‘;

TABLE_OWNER                    TABLE_NAME PARTITION_ TABLESPACE
------------------------------ ---------- ---------- ----------
SCOTT                          PART_TAB   P1         U1
SCOTT                          PART_TAB   P2         U2
SCOTT                          PART_TAB   P3         U3
SCOTT                          PART_TAB   P4         U4
SCOTT                          PART_TAB   P5         U5

 

2. Export the partitioned table:  导出分区表

#> expdp TABLES=scott.part_tab USERID="‘ / as sysdba‘" DIRECTORY=test_dir DUMPFILE=part_tab.dmp LOGFILE=part_tab.log

Export: Release 11.2.0.2.0 - Production on Thu Dec 23 08:27:24 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYS"."SYS_EXPORT_TABLE_01": TABLES=scott.part_tab USERID="/******** AS SYSDBA" DIRECTORY=test_dir DUMPFILE=part_tab.dmp LOGFILE=part_tab.log
Estimate in progress using BLOCKS method...
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 32 MB
Processing object type TABLE_EXPORT/TABLE/TABLE
. . exported "SCOTT"."PART_TAB":"P2" 5.898 KB 1 rows
. . exported "SCOTT"."PART_TAB":"P3" 5.898 KB 1 rows
. . exported "SCOTT"."PART_TAB":"P4" 5.898 KB 1 rows
. . exported "SCOTT"."PART_TAB":"P5" 5.914 KB 2 rows
. . exported "SCOTT"."PART_TAB":"P1" 0 KB 0 rows
Master table "SYS"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SYS.SYS_EXPORT_TABLE_01 is:
  /tmp/part_tab.dmp
Job "SYS"."SYS_EXPORT_TABLE_01" successfully completed at 08:28:02

 

3. Import the table in user "USER2" to convert the partitioned table into a non-partitioned table:  导入用户“ USER2”中的表，以将分区表转换为未分区表

#> impdp USERID="‘/ as sysdba‘" TABLES=scott.part_tab DIRECTORY=test_dir DUMPFILE=part_tab.dmp LOGFILE=imp_part_tab.log REMAP_SCHEMA=scott:user2 PARTITION_OPTIONS=merge

Import: Release 11.2.0.2.0 - Production on Thu Dec 23 08:39:08 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "SYS"."SYS_IMPORT_TABLE_01" successfully loaded/unloaded
Starting "SYS"."SYS_IMPORT_TABLE_01": USERID="/******** AS SYSDBA" TABLES=scott.part_tab DIRECTORY=test_dir DUMPFILE=part_tab.dmp LOGFILE=imp_part_tab.log REMAP_SCHEMA=scott:user2 PARTITION_OPTIONS=merge
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "USER2"."PART_TAB":"P2" 5.898 KB 1 rows
. . imported "USER2"."PART_TAB":"P3" 5.898 KB 1 rows
. . imported "USER2"."PART_TAB":"P4" 5.898 KB 1 rows
. . imported "USER2"."PART_TAB":"P5" 5.914 KB 2 rows
. . imported "USER2"."PART_TAB":"P1" 0 KB 0 rows
Job "SYS"."SYS_IMPORT_TABLE_01" successfully completed at 08:39:17

select * from user2.part_tab;

YEAR       PRODUCT    AMT
---------- ---------- ----------
      1992 p1                100
      1993 p2                200
      1994 p3                300
      1995 p4                400
      2010 p5                500

select OWNER, TABLE_NAME, PARTITIONED
from   dba_tables
where  table_name = ‘PART_TAB‘ and owner = ‘USER2‘;

OWNER                          TABLE_NAME PAR
------------------------------ ---------- ---
USER2                          PART_TAB   NO

select TABLE_OWNER, TABLE_NAME, PARTITION_NAME, TABLESPACE_NAME
from   dba_tab_partitions
where  TABLE_NAME = ‘PART_TAB‘ and TABLE_OWNER = ‘USER2‘;

no rows selected


Note:
------
If there is a local or global prefixed index created on the partitioned table, import with PARTITION_OPTIONS=merge also converts the index to non-partitioned.
--如果在分区表上创建了本地或全局前缀索引，则使用PARTITION_OPTIONS = merge导入也会将索引转换为非分区索引。

- local prefixed index:
CREATE INDEX part_tab_loc_idx ON part_tab(year) LOCAL;

After import with REMAP_SCHEMA=scott:user2 PARTITION_OPTIONS=merge, the local prefixed index is also converted to a non-partitioned index:

select OWNER, INDEX_NAME, PARTITIONED
from dba_indexes
where index_name=‘PART_TAB_GLOB_IDX‘;
OWNER INDEX_NAME PAR
---------- -------------------- ---
SCOTT PART_TAB_LOC_IDX YES
USER2 PART_TAB_LOC_IDX NO  


  -or-

- global prefixed index:
CREATE INDEX part_tab_glob_idx ON part_tab(year)
GLOBAL PARTITION BY RANGE (year)
(partition p1 values less than (1992),
partition p2 values less than (1993),
partition p3 values less than (1994),
partition p4 values less than (1995),
partition p5 values less than (MAXVALUE)
);

After import with REMAP_SCHEMA=scott:user2 PARTITION_OPTIONS=merge, the local prefixed index is also converted to a non-partitioned index:

select OWNER, INDEX_NAME, PARTITIONED
from dba_indexes
where index_name=‘PART_TAB_GLOB_IDX‘;
OWNER INDEX_NAME PAR
---------- -------------------- ---
SCOTT PART_TAB_GLOB_IDX YES
USER2 PART_TAB_GLOB_IDX NO

Note:
1/ The DEPARTITION option is applicable to Transportable tablespace. For more details refer Note 1063299.1 - Tablespace Transport for a Single Partition.  DEPARTITION选项适用于传输表空间。有关更多详细信息，请参见注释1063299.1-单分区的表空间传输。
2/ The DEPARTITION option can be used against a Standard database, even though Partitioning isn‘t available in Standard Edition.  即使Partitioning在Standard Edition中不可用，DEPARTITION选项也可用于Standard数据库。