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云数据库 GAUSSDB-CREATE TABLE SUBPARTITION:示例

云数据库 GAUSSDB-CREATE TABLE SUBPARTITION:示例

时间：2024-11-02 18:53:04
云数据库 GAUSSDB

示例

  • 示例1：创建各种组合类型的二级分区表 
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    CREATE TABLE list_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY LIST (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901 VALUES ( '201902' )
  (
    SUBPARTITION p_201901_a VALUES ( '1' ),
    SUBPARTITION p_201901_b VALUES ( '2' )
  ),
  PARTITION p_201902 VALUES ( '201903' )
  (
    SUBPARTITION p_201902_a VALUES ( '1' ),
    SUBPARTITION p_201902_b VALUES ( '2' )
  )
);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201902', '2', '1', 1);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
insert into list_list values('201903', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
select * from list_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(6 rows)

drop table list_list;
CREATE TABLE list_hash
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY LIST (month_code) SUBPARTITION BY HASH (dept_code)
(
  PARTITION p_201901 VALUES ( '201902' )
  (
    SUBPARTITION p_201901_a,
    SUBPARTITION p_201901_b
  ),
  PARTITION p_201902 VALUES ( '201903' )
  (
    SUBPARTITION p_201902_a,
    SUBPARTITION p_201902_b
  )
);
insert into list_hash values('201902', '1', '1', 1);
insert into list_hash values('201902', '2', '1', 1);
insert into list_hash values('201902', '3', '1', 1);
insert into list_hash values('201903', '4', '1', 1);
insert into list_hash values('201903', '5', '1', 1);
insert into list_hash values('201903', '6', '1', 1);
select * from list_hash;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 4         | 1       |         1
 201903     | 5         | 1       |         1
 201903     | 6         | 1       |         1
 201902     | 2         | 1       |         1
 201902     | 3         | 1       |         1
 201902     | 1         | 1       |         1
(6 rows)

drop table list_hash;
CREATE TABLE list_range
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY LIST (month_code) SUBPARTITION BY RANGE (dept_code)
(
  PARTITION p_201901 VALUES ( '201902' )
  (
    SUBPARTITION p_201901_a values less than ('4'),
    SUBPARTITION p_201901_b values less than ('6')
  ),
  PARTITION p_201902 VALUES ( '201903' )
  (
    SUBPARTITION p_201902_a values less than ('3'),
    SUBPARTITION p_201902_b values less than ('6')
  )
);
insert into list_range values('201902', '1', '1', 1);
insert into list_range values('201902', '2', '1', 1);
insert into list_range values('201902', '3', '1', 1);
insert into list_range values('201903', '4', '1', 1);
insert into list_range values('201903', '5', '1', 1);
insert into list_range values('201903', '6', '1', 1);
ERROR:  inserted partition key does not map to any table partition
select * from list_range;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 4         | 1       |         1
 201903     | 5         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 2         | 1       |         1
 201902     | 3         | 1       |         1
(5 rows)

drop table list_range;
CREATE TABLE range_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY RANGE (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901 VALUES LESS THAN( '201903' )
  (
    SUBPARTITION p_201901_a values ('1'),
    SUBPARTITION p_201901_b values ('2')
  ),
  PARTITION p_201902 VALUES LESS THAN( '201904' )
  (
    SUBPARTITION p_201902_a values ('1'),
    SUBPARTITION p_201902_b values ('2')
  )
);
insert into range_list values('201902', '1', '1', 1);
insert into range_list values('201902', '2', '1', 1);
insert into range_list values('201902', '1', '1', 1);
insert into range_list values('201903', '2', '1', 1);
insert into range_list values('201903', '1', '1', 1);
insert into range_list values('201903', '2', '1', 1);
select * from range_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
(6 rows)

drop table range_list;
CREATE TABLE range_hash
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY RANGE (month_code) SUBPARTITION BY HASH (dept_code)
(
  PARTITION p_201901 VALUES LESS THAN( '201903' )
  (
    SUBPARTITION p_201901_a,
    SUBPARTITION p_201901_b
  ),
  PARTITION p_201902 VALUES LESS THAN( '201904' )
  (
    SUBPARTITION p_201902_a,
    SUBPARTITION p_201902_b
  )
);
insert into range_hash values('201902', '1', '1', 1);
insert into range_hash values('201902', '2', '1', 1);
insert into range_hash values('201902', '1', '1', 1);
insert into range_hash values('201903', '2', '1', 1);
insert into range_hash values('201903', '1', '1', 1);
insert into range_hash values('201903', '2', '1', 1);
select * from range_hash;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
(6 rows)

drop table range_hash;
CREATE TABLE range_range
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY RANGE (month_code) SUBPARTITION BY RANGE (dept_code)
(
  PARTITION p_201901 VALUES LESS THAN( '201903' )
  (
    SUBPARTITION p_201901_a VALUES LESS THAN( '2' ),
    SUBPARTITION p_201901_b VALUES LESS THAN( '3' )
  ),
  PARTITION p_201902 VALUES LESS THAN( '201904' )
  (
    SUBPARTITION p_201902_a VALUES LESS THAN( '2' ),
    SUBPARTITION p_201902_b VALUES LESS THAN( '3' )
  )
);
insert into range_range values('201902', '1', '1', 1);
insert into range_range values('201902', '2', '1', 1);
insert into range_range values('201902', '1', '1', 1);
insert into range_range values('201903', '2', '1', 1);
insert into range_range values('201903', '1', '1', 1);
insert into range_range values('201903', '2', '1', 1);
select * from range_range;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 2         | 1       |         1
 201903     | 1         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
(6 rows)

drop table range_range;
CREATE TABLE hash_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY hash (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901
  (
    SUBPARTITION p_201901_a VALUES ( '1' ),
    SUBPARTITION p_201901_b VALUES ( '2' )
  ),
  PARTITION p_201902
  (
    SUBPARTITION p_201902_a VALUES ( '1' ),
    SUBPARTITION p_201902_b VALUES ( '2' )
  )
);
insert into hash_list values('201901', '1', '1', 1);
insert into hash_list values('201901', '2', '1', 1);
insert into hash_list values('201901', '1', '1', 1);
insert into hash_list values('201903', '2', '1', 1);
insert into hash_list values('201903', '1', '1', 1);
insert into hash_list values('201903', '2', '1', 1);
select * from hash_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
 201901     | 2         | 1       |         1
 201901     | 1         | 1       |         1
 201901     | 1         | 1       |         1
(6 rows)

drop table hash_list;
CREATE TABLE hash_hash
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY hash (month_code) SUBPARTITION BY hash (dept_code)
(
  PARTITION p_201901
  (
    SUBPARTITION p_201901_a,
    SUBPARTITION p_201901_b
  ),
  PARTITION p_201902
  (
    SUBPARTITION p_201902_a,
    SUBPARTITION p_201902_b
  )
);
insert into hash_hash values('201901', '1', '1', 1);
insert into hash_hash values('201901', '2', '1', 1);
insert into hash_hash values('201901', '1', '1', 1);
insert into hash_hash values('201903', '2', '1', 1);
insert into hash_hash values('201903', '1', '1', 1);
insert into hash_hash values('201903', '2', '1', 1);
select * from hash_hash;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
 201901     | 2         | 1       |         1
 201901     | 1         | 1       |         1
 201901     | 1         | 1       |         1
(6 rows)

drop table hash_hash;
CREATE TABLE hash_range
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY hash (month_code) SUBPARTITION BY range (dept_code)
(
  PARTITION p_201901
  (
    SUBPARTITION p_201901_a VALUES LESS THAN ( '2' ),
    SUBPARTITION p_201901_b VALUES LESS THAN ( '3' )
  ),
  PARTITION p_201902
  (
    SUBPARTITION p_201902_a VALUES LESS THAN ( '2' ),
    SUBPARTITION p_201902_b VALUES LESS THAN ( '3' )
  )
);
insert into hash_range values('201901', '1', '1', 1);
insert into hash_range values('201901', '2', '1', 1);
insert into hash_range values('201901', '1', '1', 1);
insert into hash_range values('201903', '2', '1', 1);
insert into hash_range values('201903', '1', '1', 1);
insert into hash_range values('201903', '2', '1', 1);
select * from hash_range;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 1         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201901     | 1         | 1       |         1
 201901     | 1         | 1       |         1
 201901     | 2         | 1       |         1
(6 rows)
  • 示例2：对二级分区表进行DML指定分区操作 
    CREATE TABLE range_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY RANGE (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901 VALUES LESS THAN( '201903' )
  (
    SUBPARTITION p_201901_a values ('1'),
    SUBPARTITION p_201901_b values ('2')
  ),
  PARTITION p_201902 VALUES LESS THAN( '201910' )
  (
    SUBPARTITION p_201902_a values ('1'),
    SUBPARTITION p_201902_b values ('2')
  )
);
--指定一级分区插入数据
insert into range_list partition (p_201901) values('201902', '1', '1', 1);
--实际分区和指定分区不一致，报错
insert into range_list partition (p_201902) values('201902', '1', '1', 1);
ERROR:  inserted partition key does not map to the table partition
DETAIL:  N/A.
--指定二级分区插入数据
insert into range_list subpartition (p_201901_a) values('201902', '1', '1', 1);
--实际分区和指定分区不一致，报错
insert into range_list subpartition (p_201901_b) values('201902', '1', '1', 1);
ERROR:  inserted subpartition key does not map to the table subpartition
DETAIL:  N/A.
insert into range_list partition for ('201902') values('201902', '1', '1', 1);
insert into range_list subpartition for ('201902','1') values('201902', '1', '1', 1);

--指定分区查询数据
select * from range_list partition (p_201901);
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

select * from range_list subpartition (p_201901_a);
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

select * from range_list partition for ('201902');
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

select * from range_list subpartition for ('201902','1');
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

--指定分区更新数据
update range_list partition (p_201901) set user_no = '2';
select * from range_list;
select *from range_list; month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 2       |         1
 201902     | 1         | 2       |         1
 201902     | 1         | 2       |         1
 201902     | 1         | 2       |         1
(4 rows)
update range_list subpartition (p_201901_a) set user_no = '3';
select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 3       |         1
 201902     | 1         | 3       |         1
 201902     | 1         | 3       |         1
 201902     | 1         | 3       |         1
(4 rows)
update range_list partition for ('201902') set user_no = '4';
select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 4       |         1
 201902     | 1         | 4       |         1
 201902     | 1         | 4       |         1
 201902     | 1         | 4       |         1
(4 rows)
update range_list subpartition for ('201902','2') set user_no = '5';
openGauss=# select *from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 4       |         1
 201902     | 1         | 4       |         1
 201902     | 1         | 4       |         1
 201902     | 1         | 4       |         1
(4 rows)
select * from range_list;

--指定分区删除数据
delete from range_list partition (p_201901);
DELETE 4
delete from range_list partition for ('201903');
DELETE 0
delete from range_list subpartition (p_201901_a);
DELETE 0
delete from range_list subpartition for ('201903','2');
DELETE 0

--指定分区insert数据
insert into range_list partition (p_201901)  values('201902', '1', '1', 1)  ON DUPLICATE KEY UPDATE sales_amt = 5;
insert into range_list subpartition (p_201901_a)  values('201902', '1', '1', 1)  ON DUPLICATE KEY UPDATE sales_amt = 10;
insert into range_list partition for ('201902')  values('201902', '1', '1', 1)  ON DUPLICATE KEY UPDATE sales_amt = 30;
insert into range_list subpartition for ('201902','1')  values('201902', '1', '1', 1)  ON DUPLICATE KEY UPDATE sales_amt = 40;
select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

--指定分区merge into数据
CREATE TABLE newrange_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY RANGE (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901 VALUES LESS THAN( '201903' )
  (
    SUBPARTITION p_201901_a values ('1'),
    SUBPARTITION p_201901_b values ('2')
  ),
  PARTITION p_201902 VALUES LESS THAN( '201910' )
  (
    SUBPARTITION p_201902_a values ('1'),
    SUBPARTITION p_201902_b values ('2')
  )
);
insert into newrange_list values('201902', '1', '1', 1);
insert into newrange_list values('201903', '1', '1', 2);

MERGE INTO range_list partition (p_201901) p
USING newrange_list partition (p_201901) np
ON p.month_code= np.month_code
WHEN MATCHED THEN
  UPDATE SET dept_code = np.dept_code, user_no = np.user_no, sales_amt = np.sales_amt
WHEN NOT MATCHED THEN  
  INSERT VALUES (np.month_code, np.dept_code, np.user_no, np.sales_amt);

select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

MERGE INTO range_list partition for ('201901') p
USING newrange_list partition for ('201901') np
ON p.month_code= np.month_code
WHEN MATCHED THEN
  UPDATE SET dept_code = np.dept_code, user_no = np.user_no, sales_amt = np.sales_amt
WHEN NOT MATCHED THEN  
  INSERT VALUES (np.month_code, np.dept_code, np.user_no, np.sales_amt);

select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

MERGE INTO range_list subpartition (p_201901_a) p
USING newrange_list subpartition (p_201901_a) np
ON p.month_code= np.month_code
WHEN MATCHED THEN
  UPDATE SET dept_code = np.dept_code, user_no = np.user_no, sales_amt = np.sales_amt
WHEN NOT MATCHED THEN  
  INSERT VALUES (np.month_code, np.dept_code, np.user_no, np.sales_amt);

select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)

MERGE INTO range_list subpartition for ('201901', '1') p
USING newrange_list subpartition for ('201901', '1') np
ON p.month_code= np.month_code
WHEN MATCHED THEN
  UPDATE SET dept_code = np.dept_code, user_no = np.user_no, sales_amt = np.sales_amt
WHEN NOT MATCHED THEN  
  INSERT VALUES (np.month_code, np.dept_code, np.user_no, np.sales_amt);

select * from range_list;
 month_code | dept_code | user_no | sales_amt
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(4 rows)
  • 示例3对二级分区表进行truncate操作 
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    CREATE TABLE list_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY LIST (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901 VALUES ( '201902' )
  (
    SUBPARTITION p_201901_a VALUES ( '1' ),
    SUBPARTITION p_201901_b VALUES ( default )
  ),
  PARTITION p_201902 VALUES ( '201903' )
  (
    SUBPARTITION p_201902_a VALUES ( '1' ),
    SUBPARTITION p_201902_b VALUES ( '2' )
  )
);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201902', '2', '1', 1);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
insert into list_list values('201903', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
select * from list_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(6 rows)

select * from list_list partition (p_201901);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(3 rows)

alter table list_list truncate partition p_201901;
select * from list_list partition (p_201901);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list partition (p_201902);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
(3 rows)

alter table list_list truncate partition p_201902;
select * from list_list partition (p_201902);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201902', '2', '1', 1);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
insert into list_list values('201903', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
select * from list_list subpartition (p_201901_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(2 rows)

alter table list_list truncate subpartition p_201901_a;
select * from list_list subpartition (p_201901_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list subpartition (p_201901_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
(1 row)

alter table list_list truncate subpartition p_201901_b;
select * from list_list subpartition (p_201901_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list subpartition (p_201902_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 1         | 1       |         1
(1 row)

alter table list_list truncate subpartition p_201902_a;
select * from list_list subpartition (p_201902_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list subpartition (p_201902_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
(2 rows)

alter table list_list truncate subpartition p_201902_b;
select * from list_list subpartition (p_201902_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

drop table list_list;
  • 示例4：对二级分区表进行split操作 
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    CREATE TABLE list_list
(
    month_code VARCHAR2 ( 30 ) NOT NULL ,
    dept_code  VARCHAR2 ( 30 ) NOT NULL ,
    user_no    VARCHAR2 ( 30 ) NOT NULL ,
    sales_amt  int
)
PARTITION BY LIST (month_code) SUBPARTITION BY LIST (dept_code)
(
  PARTITION p_201901 VALUES ( '201902' )
  (
    SUBPARTITION p_201901_a VALUES ( '1' ),
    SUBPARTITION p_201901_b VALUES ( default )
  ),
  PARTITION p_201902 VALUES ( '201903' )
  (
    SUBPARTITION p_201902_a VALUES ( '1' ),
    SUBPARTITION p_201902_b VALUES ( default )
  )
);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201902', '2', '1', 1);
insert into list_list values('201902', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
insert into list_list values('201903', '1', '1', 1);
insert into list_list values('201903', '2', '1', 1);
select * from list_list;
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
 201903     | 1         | 1       |         1
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(6 rows)

select * from list_list subpartition (p_201901_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(2 rows)

select * from list_list subpartition (p_201901_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
(1 row)

alter table list_list split subpartition p_201901_b values (2) into
(
 subpartition p_201901_b,
 subpartition p_201901_c
);
select * from list_list subpartition (p_201901_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(2 rows)

select * from list_list subpartition (p_201901_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
(1 row)

select * from list_list subpartition (p_201901_c);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list partition (p_201901);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201902     | 2         | 1       |         1
 201902     | 1         | 1       |         1
 201902     | 1         | 1       |         1
(3 rows)

select * from list_list subpartition (p_201902_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 1         | 1       |         1
(1 row)

select * from list_list subpartition (p_201902_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
(2 rows)

alter table list_list split subpartition p_201902_b values (3) into
(
 subpartition p_201902_b,
 subpartition p_201902_c
);
select * from list_list subpartition (p_201902_a);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 1         | 1       |         1
(1 row)

select * from list_list subpartition (p_201902_b);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
(0 rows)

select * from list_list subpartition (p_201902_c);
 month_code | dept_code | user_no | sales_amt 
------------+-----------+---------+-----------
 201903     | 2         | 1       |         1
 201903     | 2         | 1       |         1
(2 rows)

drop table list_list;
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