文章目录
- 查看哪些角色对表有增删改查权限
- 查看哪些角色对函数有执行权限
- 根据序列名获取表及列信息
- 查看postgresql数据库用户系统权限、对象权限
- 查看所有主键及其相关字段信息
- [查看 排除主键索引之外的 其他所有唯一性约束与唯一索引](#查看 排除主键索引之外的 其他所有唯一性约束与唯一索引)
- [给 data 用户授予 create publication 权限](#给 data 用户授予 create publication 权限)
- 统计当前库中每张表数据条数
- 查询所有外键对应的表与列
- [查看表所属 schmea 及其oid](#查看表所属 schmea 及其oid)
- [查询表是否有索引, 触发器等信息](#查询表是否有索引, 触发器等信息)
- [通过 SQL 查询表结构及其字段注释信息](#通过 SQL 查询表结构及其字段注释信息)
- 查看表的注释
查看哪些角色对表有增删改查权限
sql
SELECT grantor, grantee, table_schema, table_name, string_agg(privilege_type,',') as privilege_type
FROM information_schema.role_table_grants
group by grantor, grantee, table_schema, table_name;查看哪些角色对函数有执行权限
sql
SELECT
routine_catalog AS fct_db,
routine_schema AS fct_sch,
routine_name AS fct_nam,
privilege_type AS fct_priv,
array_agg (grantee::text ORDER BY grantee::text) AS fct_rol
FROM
information_schema.routine_privileges
WHERE
routine_schema NOT IN ('information_schema','pg_catalog')
GROUP BY
routine_catalog, routine_schema, routine_name, privilege_type
ORDER BY
routine_catalog, routine_schema, routine_name, privilege_type
;根据序列名获取表及列信息
sql
select ts.nspname as object_schema,
tbl.relname as table_name,
col.attname as column_name,
s.relname as sequence_name
from pg_class s
join pg_namespace sn on sn.oid = s.relnamespace
join pg_depend d on d.refobjid = s.oid and d.refclassid='pg_class'::regclass
join pg_attrdef ad on ad.oid = d.objid and d.classid = 'pg_attrdef'::regclass
join pg_attribute col on col.attrelid = ad.adrelid and col.attnum = ad.adnum
join pg_class tbl on tbl.oid = ad.adrelid
join pg_namespace ts on ts.oid = tbl.relnamespace
where s.relkind = 'S'
-- and s.relname = 'sequence_name'
and d.deptype in ('a', 'n');查看postgresql数据库用户系统权限、对象权限
查看所有主键及其相关字段信息
- 方法1
sql
select kcu.table_schema,
kcu.table_name,
tco.constraint_name,
string_agg(kcu.column_name,', ') as key_columns
from information_schema.table_constraints tco
join information_schema.key_column_usage kcu
on kcu.constraint_name = tco.constraint_name
and kcu.constraint_schema = tco.constraint_schema
and kcu.constraint_name = tco.constraint_name
where tco.constraint_type = 'PRIMARY KEY'
group by tco.constraint_name,
kcu.table_schema,
kcu.table_name
order by kcu.table_schema,
kcu.table_name;参考: https://dataedo.com/kb/query/postgresql/list-all-primary-keys-in-database
- 方法2
sql
SELECT conrelid::regclass AS table_name,
conname AS primary_key,
pg_get_constraintdef(oid)
FROM pg_constraint
WHERE contype = 'p'
AND connamespace = 'public'::regnamespace
ORDER BY conrelid::regclass::text, contype DESC; 查看 排除主键索引之外的 其他所有唯一性约束与唯一索引
sql
-- 获取 排除主键索引之外的其他的所有唯一性索引
select * from pg_indexes where schemaname='public' and indexname not in
(
with tmp as
(
select kcu.table_schema, kcu.table_name, tco.constraint_name, string_agg(kcu.column_name,', ') as key_columns from information_schema.table_constraints tco join information_schema.key_column_usage kcu on kcu.constraint_name = tco.constraint_name and kcu.constraint_schema = tco.constraint_schema and kcu.constraint_name = tco.constraint_name where tco.constraint_type = 'PRIMARY KEY' group by tco.constraint_name, kcu.table_schema, kcu.table_name order by kcu.table_schema, kcu.table_name
)
select constraint_name from tmp where table_schema='public' group by constraint_name
) and indexdef ilike '%UNIQUE%';给 data 用户授予 create publication 权限
sql
grant create on DATABASE ttp to ttpdata;统计当前库中每张表数据条数
sql
\o table_count.sql
select $$select '$$ || tablename || $$', count(*) from $$ || tablename from pg_tables where schemaname='public' order by tablename \gexec
\o查询所有外键对应的表与列
sql
SELECT conname "外键约束名", conrelid::regclass AS "表名", a1.attname AS "列名" FROM pg_constraint c JOIN pg_stat_user_tables t ON t.relid = c.conrelid JOIN pg_attribute a1 ON a1.attnum = ANY(c.conkey) AND a1.attrelid = c.conrelid WHERE confrelid <> 0;- 授权序列访问权限
sql
--授予当前 public 中所有序列访问权限
grant usage ,select , update on all sequences in schema public to test_user;
--授予未来 public 中所有序列访问权限
alter default privileges for user test_user in schema public grant select ,update,usage on SEQUENCES to test_user;- 授予 public 模式中所有表的 read 权限
sql
--1. 授权已有表的只读权限给 用户
grant usage on schema public to test_user;
grant select on all tables in schema public to test_user;
--2. 授予未来新建的表的只读权限 给用户
alter default privileges
[ for role xxdata ]-- 注意, 这里在多用户情况下, 是必须的, 否则会被当做这些 public 模式下的表是 postgres 创建的, 单用户模式下是可选的
in schema public grant select on tables to test_user;
--3. 回收 public 模式中所有表的 read 权限
revoke usage on schema public from test_user;
revoke select on all tables in schema public from test_user;
alter default privileges
[ for role xxdata ] -- 注意, 这里在多用户情况下, 是必须的, 否则会被当做这些 public 模式下的表是 postgres 创建的, 单用户模式下是可选的
in schema public revoke select on tables from test_user;查看表所属 schmea 及其oid
sql
-- 假设查询的是 test 表
SELECT c.oid,
n.nspname,
c.relname
FROM pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname OPERATOR(pg_catalog.~) '^(test)$'
AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 2, 3;查询表是否有索引, 触发器等信息
sql
SELECT c.relchecks, c.relkind, c.relhasindex, c.relhasrules, c.relhastriggers, c.relrowsecurity, c.relforcerowsecurity, false AS relhasoids, c.relispartition, pg_catalog.array_to_string(c.reloptions || array(select 'toast.' || x from pg_catalog.unnest(tc.reloptions) x), ', ')
, c.reltablespace, CASE WHEN c.reloftype = 0 THEN '' ELSE c.reloftype::pg_catalog.regtype::pg_catalog.text END, c.relpersistence, c.relreplident, am.amname
FROM pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_class tc ON (c.reltoastrelid = tc.oid)
LEFT JOIN pg_catalog.pg_am am ON (c.relam = am.oid)
WHERE c.oid = (select oid from pg_class where relname OPERATOR(pg_catalog.~) '^(test)$');通过 SQL 查询表结构及其字段注释信息
sql
SELECT a.attname,
pg_catalog.format_type(a.atttypid, a.atttypmod),
(SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef),
a.attnotnull,
(SELECT c.collname FROM pg_catalog.pg_collation c, pg_catalog.pg_type t
WHERE c.oid = a.attcollation AND t.oid = a.atttypid AND a.attcollation <> t.typcollation) AS attcollation,
a.attidentity,
a.attstorage,
CASE WHEN a.attstattarget=-1 THEN NULL ELSE a.attstattarget END AS attstattarget,
pg_catalog.col_description(a.attrelid, a.attnum)
FROM pg_catalog.pg_attribute a
WHERE a.attrelid = (select oid from pg_class where relname OPERATOR(pg_catalog.~) '^(test)$')
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum;
--精简版
SELECT a.attname 字段名,
pg_catalog.format_type(a.atttypid, a.atttypmod) 字段类型,
a.attnotnull 字段是否非空,
pg_catalog.col_description(a.attrelid, a.attnum) 字段注释
FROM pg_catalog.pg_attribute a
WHERE a.attrelid = (select oid from pg_class where relname OPERATOR(pg_catalog.~) '^(test)$')
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum;查看表的注释
sql
SELECT relname AS tabname,cast( obj_description ( relfilenode, 'pg_class' ) AS VARCHAR ) AS COMMENT FROM pg_class c WHERE relkind = 'r' AND relname ='test';