opengauss每日一练第10天-课后作业

学习目标
学习openGauss分区表索引

课程作业
1.创建范围分区表products, 为表创建分区表索引1，不指定索引分区的名称，创建分区表索引2，并指定索引分区的名称，创建GLOBAL分区索引3
CREATE TABLESPACE products1 RELATIVE LOCATION 'tablespace1/tablespace_1';
CREATE TABLESPACE products2 RELATIVE LOCATION 'tablespace2/tablespace_2';
CREATE TABLESPACE products3 RELATIVE LOCATION 'tablespace3/tablespace_3';
CREATE TABLESPACE products4 RELATIVE LOCATION 'tablespace4/tablespace_4';
create schema tpcds;

CREATE TABLE tpcds.products
(
CA_ADDRESS_SK INTEGER NOT NULL,
CA_ADDRESS_ID CHAR(16) NOT NULL,
CA_STREET_NUMBER CHAR(10) ,
CA_STREET_NAME VARCHAR(60) ,
CA_STREET_TYPE CHAR(15) ,
CA_SUITE_NUMBER CHAR(10) ,
CA_CITY VARCHAR(60) ,
CA_COUNTY VARCHAR(30) ,
CA_STATE CHAR(2) ,
CA_ZIP CHAR(10) ,
CA_COUNTRY VARCHAR(20) ,
CA_GMT_OFFSET DECIMAL(5,2) ,
CA_LOCATION_TYPE CHAR(20)
)
PARTITION BY RANGE(CA_ADDRESS_SK)
(
PARTITION p1 VALUES LESS THAN (3000),
PARTITION p2 VALUES LESS THAN (5000) TABLESPACE products1,
PARTITION p3 VALUES LESS THAN (MAXVALUE) TABLESPACE products2
);

CREATE INDEX products_index1 ON tpcds.products(CA_ADDRESS_SK) LOCAL;

\d+ tpcds.products;

CREATE INDEX products_index2 ON
tpcds.products(CA_ADDRESS_SK) LOCAL
(
PARTITION CA_ADDRESS_SK_index1,
PARTITION CA_ADDRESS_SK_index2 TABLESPACE products3,
PARTITION CA_ADDRESS_SK_index3 TABLESPACE products4
);

CREATE INDEX products_index3 ON tpcds.products(CA_ADDRESS_ID);

2.在分区表索引1上，修改分区表索引的表空间，重命名分区表索引
\d+ tpcds.products;

ALTER INDEX tpcds.products_index1 MOVE PARTITION p1_ca_address_sk_idx TABLESPACE products4;


3.在分区表索引2上，重建单个索引分区和分区上的所有索引
重建单个索引分区

reindex index tpcds.products_index2 PARTITION ca_address_sk_index1;

重建分区上的所有索引

reindex table tpcds.products PARTITION p1;

4.使用\d+、系统视图pg_indexes和pg_partition查看索引信息

\d+ tpcds.products;

select * from pg_indexes where tablename = 'products';

select * from pg_partition;

5.删除索引、表和表空间
drop index tpcds.products_index1;
drop index tpcds.products_index2;
drop index tpcds.products_index3;

drop table tpcds.products;
drop schema tpcds;
drop tablespace products1;
drop tablespace products2;
drop tablespace products3;
drop tablespace products4;