我使用了Postgresql 9.6的继承功能为大量数据创建了一些存档。
最后一个父表看起来像这样
foo=# \d+ foo_data_sshcommand
Table "public.foo_data_sshcommand"
Column | Type | Modifiers | Storage | Stats target | Description
------------+--------------------------+-------------------------------------------------------------------+----------+--------------+-------------
id | integer | not null default nextval('foo_data_sshcommand_id_seq'::regclass) | plain | |
time | timestamp with time zone | not null | plain | |
command | text | not null | extended | |
success | boolean | not null | plain | |
session_id | integer | not null | plain | |
Indexes:
"foo_data_sshcommand_pkey" PRIMARY KEY, btree (id)
"foo_data_sshcommand_session_id_c8b38d68" btree (session_id)
Check constraints:
"partition_check" CHECK ("time" >= '2019-10-01 00:00:00+02'::timestamp with time zone) NO INHERIT
Foreign-key constraints:
"foo_data_sshcommand_session_id_c8b38d68_fk" FOREIGN KEY (session_id) REFERENCES foo_data_sshsession(id) DEFERRABLE INITIALLY DEFERRED
Child tables: arc_2019_01_foo_data_sshcommand,
arc_2019_02_foo_data_sshcommand,
arc_2019_03_foo_data_sshcommand,
arc_2019_04_foo_data_sshcommand,
arc_2019_05_foo_data_sshcommand,
arc_2019_06_foo_data_sshcommand,
arc_2019_07_foo_data_sshcommand,
arc_2019_08_foo_data_sshcommand,
arc_2019_09_foo_data_sshcommand,
arc_2019_foo_data_sshcommand
每个月它都会创建另外两个表，并将它们添加到存档中。这不是一个好过程，因为它必须将溢出的数据从父表移至新的子表。但这不是我想谈的问题。我很好奇这个问题-一个父表的继承可以包含多少张表？