1.查看有哪些分区表
sspudb=# select partrelid::regclass,* from pg_partitioned_table;
partrelid | partrelid | partstrat | partnatts | partdefid | partattrs | partclass | partcollation | partexprs
-------------------+-----------+-----------+-----------+-----------+-----------+-----------+---------------+-----------
sspudb_hash1 | 16703 | h | 1 | 0 | 1 | 10030 | 0 |
sspudb_r1 | 16730 | r | 1 | 0 | 6 | 3128 | 0 |
sspudb_list1 | 16718 | l | 1 | 16727 | 7 | 3126 | 100 |
sspudb_rr1 | 16875 | r | 1 | 0 | 6 | 3128 | 0 |
sspudb_rr1_p2010 | 16885 | r | 1 | 0 | 6 | 3128 | 0 |
sspudb_rr1_p2011 | 16890 | r | 1 | 0 | 6 | 3128 | 0 |
sspudb_rh1 | 16953 | r | 1 | 0 | 6 | 3128 | 0 |
sspudb_rh1_phis | 16958 | h | 1 | 0 | 1 | 10030 | 0 |
sspudb_rh1_p2010 | 16963 | h | 1 | 0 | 1 | 10030 | 0 |
sspudb_rh1_p2011 | 16968 | h | 1 | 0 | 1 | 10030 | 0 |
sspudb_rh1_pother | 16973 | h | 1 | 0 | 1 | 10030 | 0 |
(11 rows)2.查看分区表和分区索引大小
sspudb=# dP+
List of partitioned relations
Schema | Name | Owner | Type | Table | Total size | Description
--------+----------------------------+----------+-------------------+--------------+------------+-------------
public | sspudb_hash1 | sspu | partitioned table | | 24 kB |
public | sspudb_list1 | sspu | partitioned table | | 16 kB |
public | sspudb_r1 | sspu | partitioned table | | 64 kB |
public | sspudb_rh1 | postgres | partitioned table | | 32 kB |
public | sspudb_rr1 | postgres | partitioned table | | 24 kB |
public | idx_sspudb_hash1_id | sspu | partitioned index | sspudb_hash1 | 56 kB |
public | idx_sspudb_list1_region | sspu | partitioned index | sspudb_list1 | 40 kB |
public | idx_sspudb_r1_joindate | sspu | partitioned index | sspudb_r1 | 160 kB |
public | idx_sspudb_rh1_joindate_id | postgres | partitioned index | sspudb_rh1 | 96 kB |
public | idx_sspudb_rr1_joindate | postgres | partitioned index | sspudb_rr1 | 104 kB |
public | sspudb_hash1_pkey | sspu | partitioned index | sspudb_hash1 | 56 kB |
public | sspudb_list1_pkey | sspu | partitioned index | sspudb_list1 | 40 kB |
public | sspudb_r1_pkey | sspu | partitioned index | sspudb_r1 | 160 kB |
public | sspudb_rh1_pkey | postgres | partitioned index | sspudb_rh1 | 96 kB |
public | sspudb_rr1_pkey | postgres | partitioned index | sspudb_rr1 | 104 kB |
(15 rows)3.d参数查看分区
sspudb=# d+ sspudb_r1;
Partitioned table "public.sspudb_r1"
Column | Type | Collation | Nullable | Default | Storage | Compression | Stats target | Description
------------+-----------------------------+-----------+----------+---------+----------+-------------+--------------+-------------
id | numeric(20,0) | | not null | | main | | |
name | character varying(20) | | not null | | extended | | |
age | numeric(10,0) | | not null | | main | | |
sex | character varying(10) | | not null | | extended | | |
cardid | numeric(30,0) | | not null | | main | | |
joindate | timestamp without time zone | | not null | | plain | | |
region | character varying(12) | | not null | | extended | | |
tel | character varying(12) | | not null | | extended | | |
email | character varying(30) | | not null | | extended | | |
recommend | character varying(10) | | | | extended | | |
identifier | character varying(100) | | | | extended | | |
Partition key: RANGE (joindate)
Indexes:
"sspudb_r1_pkey" PRIMARY KEY, btree (id, joindate)
"idx_sspudb_r1_joindate" btree (joindate)
Partitions: sspudb_r1_p2010 FOR VALUES FROM ('2010-01-01 00:00:00') TO ('2011-01-01 00:00:00'),
sspudb_r1_p2011 FOR VALUES FROM ('2011-01-01 00:00:00') TO ('2012-01-01 00:00:00'),
sspudb_r1_p2012 FOR VALUES FROM ('2012-01-01 00:00:00') TO ('2013-01-01 00:00:00'),
sspudb_r1_p2013 FOR VALUES FROM ('2013-01-01 00:00:00') TO ('2014-01-01 00:00:00'),
sspudb_r1_p2014 FOR VALUES FROM ('2014-01-01 00:00:00') TO ('2015-01-01 00:00:00'),
sspudb_r1_p2015 FOR VALUES FROM ('2015-01-01 00:00:00') TO ('2016-01-01 00:00:00'),
sspudb_r1_p2016 FOR VALUES FROM ('2016-01-01 00:00:00') TO ('2017-01-01 00:00:00'),
sspudb_r1_p2017 FOR VALUES FROM ('2017-01-01 00:00:00') TO ('2018-01-01 00:00:00'),
sspudb_r1_p2018 FOR VALUES FROM ('2018-01-01 00:00:00') TO ('2019-01-01 00:00:00'),
sspudb_r1_p2019 FOR VALUES FROM ('2019-01-01 00:00:00') TO ('2020-01-01 00:00:00'),
sspudb_r1_p2020 FOR VALUES FROM ('2020-01-01 00:00:00') TO ('2021-01-01 00:00:00'),
sspudb_r1_phis FOR VALUES FROM (MINVALUE) TO ('2010-01-01 00:00:00')
sspudb=# dt+ sspudb_r1;
List of relations
Schema | Name | Type | Owner | Persistence | Access method | Size | Description
--------+-----------+-------------------+-------+-------------+---------------+---------+-------------
public | sspudb_r1 | partitioned table | sspu | permanent | | 0 bytes |
(1 row)4.查看分区表数据分布
SELECT tableoid::regclass,* FROM sspudb_rh1 LIMIT 4;
sspudb=# SELECT tableoid::regclass,* FROM sspudb_rh1 LIMIT 4;
tableoid | id | name | age | sex | cardid | joindate | region | tel | email | re
commend | identifier
---------------------+----+------+-----+------+--------------------+---------------------+--------+-------------+-----------------+-----------+---------------
sspudb_rh1_p2010_2 | 1 | xsq1 | 18 | male | 622722199009121121 | 2010-10-01 10:10:10 | 北京 | 13651254654 | sspudb@163.com | xsq | first_people
sspudb_rh1_p2011_2 | 2 | xsq3 | 18 | male | 622722199003121121 | 2011-10-01 10:10:10 | 北京1 | 13641254654 | sspudb1@163.com | xsq1 | first_people1
sspudb_rh1_pother_1 | 4 | xsq3 | 14 | male | 622722199403121121 | 2014-10-01 10:10:10 | 北京4 | 13641254654 | sspudb4@163.com | xsq1 | first_people1
sspudb_rh1_pother_1 | 7 | xsq3 | 17 | male | 622722199703121121 | 2017-10-01 10:10:10 | 北京7 | 13647254654 | sspudb7@163.com | xsq1 | first_people1
(4 rows)5.内置分区表与其分区的继承关系
sspudb=# select
sspudb-# nmsp_parent.nspname as parent_schema,
sspudb-# parent.relname as parent,
sspudb-# nmsp_child.nspname as child_schema,
sspudb-# child.relname as child_schema
sspudb-# from pg_inherits join pg_class parent
sspudb-# on pg_inherits.inhparent = parent.oid join pg_class child
sspudb-# on pg_inherits.inhrelid = child.oid join pg_namespace nmsp_parent
sspudb-# on nmsp_parent.oid = parent.relnamespace join pg_namespace nmsp_child
sspudb-# on nmsp_child.oid = child.relnamespace
sspudb-# where parent.relname = 'sspudb_rh1';
parent_schema | parent | child_schema | child_schema
---------------+------------+--------------+-------------------
public | sspudb_rh1 | public | sspudb_rh1_phis
public | sspudb_rh1 | public | sspudb_rh1_p2010
public | sspudb_rh1 | public | sspudb_rh1_p2011
public | sspudb_rh1 | public | sspudb_rh1_pother
(4 rows)6.查看分区表的分区数量
sspudb=# select
sspudb-# nspname,
sspudb-# relname,
sspudb-# count(*) as partition_num
sspudb-# from
sspudb-# pg_class c,
sspudb-# pg_namespace n,
sspudb-# pg_inherits i
sspudb-# where c.oid = i.inhparent
sspudb-# and c.relnamespace = n.oid
sspudb-# and c.relhassubclass
sspudb-# and c.relkind in ('r','p')
sspudb-# group by 1,2
sspudb-# order by partition_num desc;
nspname | relname | partition_num
---------+-------------------+---------------
public | sspudb_r1 | 12
public | sspudb_hash1 | 4
public | sspudb_rh1 | 4
public | sspudb_rr1 | 4
public | sspudb_rr1_p2010 | 4
public | sspudb_rr1_p2011 | 4
public | sspudb_list1 | 3
public | sspudb_rh1_phis | 2
public | sspudb_rh1_pother | 2
public | sspudb_rh1_p2010 | 2
public | sspudb_rh1_p2011 | 2
(11 rows)7.检查表的分析时间
sspudb=# select relname,last_vacuum,last_analyze
sspudb-# from pg_stat_all_tables where relname like 'sspudb_rh1%';
relname | last_vacuum | last_analyze
---------------------+-------------+--------------
sspudb_rh1 | |
sspudb_rh1_phis | |
sspudb_rh1_p2010 | |
sspudb_rh1_p2011 | |
sspudb_rh1_pother | |
sspudb_rh1_phis_1 | |
sspudb_rh1_phis_2 | |
sspudb_rh1_p2010_1 | |
sspudb_rh1_p2010_2 | |
sspudb_rh1_p2011_1 | |
sspudb_rh1_p2011_2 | |
sspudb_rh1_pother_1 | |
sspudb_rh1_pother_2 | |
(13 rows)
--分析主表时，子表全部被分析。
sspudb=# analyze sspudb_rh1;
ANALYZE
sspudb=# select relname,last_vacuum,last_analyze
from pg_stat_all_tables where relname like 'sspudb_rh1%';
relname | last_vacuum | last_analyze
---------------------+-------------+-------------------------------
sspudb_rh1 | | 2024-08-31 17:25:32.983803+08
sspudb_rh1_phis | | 2024-08-31 17:25:32.984236+08
sspudb_rh1_p2010 | | 2024-08-31 17:25:32.984454+08
sspudb_rh1_p2011 | | 2024-08-31 17:25:32.984792+08
sspudb_rh1_pother | | 2024-08-31 17:25:32.985285+08
sspudb_rh1_phis_1 | | 2024-08-31 17:25:32.985728+08
sspudb_rh1_phis_2 | | 2024-08-31 17:25:32.985786+08
sspudb_rh1_p2010_1 | | 2024-08-31 17:25:32.985836+08
sspudb_rh1_p2010_2 | | 2024-08-31 17:25:32.986052+08
sspudb_rh1_p2011_1 | | 2024-08-31 17:25:32.986337+08
sspudb_rh1_p2011_2 | | 2024-08-31 17:25:32.986509+08
sspudb_rh1_pother_1 | | 2024-08-31 17:25:32.98685+08
sspudb_rh1_pother_2 | | 2024-08-31 17:25:32.987231+08
(13 rows)