openGauss gsql 常用元命令 一

renxyz2024-03-07 14:48

openGauss gsql 常用元命令 一

连接数据库 使用 -E 参数可以显示元命令具体执行的 SQL 信息

复制代码 
[omm@og1 ~]$ gsql -d postgres -p15400 -E
gsql ((openGauss 2.1.0 build 590b0f8e) compiled at 2021-09-30 14:29:04 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

\l 显示数据库中数据库信息

复制代码 
openGauss=# \l
********* QUERY **********
SELECT d.datname as "Name",
       pg_catalog.pg_get_userbyid(d.datdba) as "Owner",
       pg_catalog.pg_encoding_to_char(d.encoding) as "Encoding",
       d.datcollate as "Collate",
       d.datctype as "Ctype",
       pg_catalog.array_to_string(d.datacl, E'\n') AS "Access privileges"
FROM pg_catalog.pg_database d
ORDER BY 1;
**************************

                             List of databases
   Name    | Owner | Encoding |  Collate   |   Ctype    | Access privileges
-----------+-------+----------+------------+------------+-------------------
 mydb      | omm   | UTF8     | en_US.utf8 | en_US.utf8 |
 postgres  | omm   | UTF8     | en_US.utf8 | en_US.utf8 |
 studentdb | omm   | UTF8     | en_US.utf8 | en_US.utf8 |
 template0 | omm   | UTF8     | en_US.utf8 | en_US.utf8 | =c/omm           +
           |       |          |            |            | omm=CTc/omm
 template1 | omm   | UTF8     | en_US.utf8 | en_US.utf8 | =c/omm           +
           |       |          |            |            | omm=CTc/omm
(5 rows)

\du 同\dg 显示数据库中所有用户和角色

复制代码 
openGauss=# \du
********* QUERY **********
SELECT r.rolname, r.rolsuper, r.rolinherit,
  r.rolcreaterole, r.rolcreatedb, r.rolcanlogin,
  r.rolconnlimit, r.rolvalidbegin, r.rolvaliduntil,
  ARRAY(SELECT b.rolname
        FROM pg_catalog.pg_auth_members m
        JOIN pg_catalog.pg_roles b ON (m.roleid = b.oid)
        WHERE m.member = r.oid) as memberof
, r.rolreplication
, r.rolauditadmin
, r.rolsystemadmin
, r.rolmonitoradmin
, r.roloperatoradmin
, r.rolpolicyadmin
, r.roluseft
, r.rolkind
FROM pg_catalog.pg_roles r
WHERE r.rolname not in ('gs_role_copy_files', 'gs_role_signal_backend', 'gs_role_tablespace', 'gs_role_replication', 'gs_role_account_lock', 'gs_role_pldebugger')
ORDER BY 1;
**************************

                                                              List of roles
 Role name |                                                    Attributes                                                    | Member of
-----------+------------------------------------------------------------------------------------------------------------------+-----------
 omm       | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, UseFT | {}
 student   | Sysadmin                                                                                                         | {}

openGauss=# \dg
********* QUERY **********
SELECT r.rolname, r.rolsuper, r.rolinherit,
  r.rolcreaterole, r.rolcreatedb, r.rolcanlogin,
  r.rolconnlimit, r.rolvalidbegin, r.rolvaliduntil,
  ARRAY(SELECT b.rolname
        FROM pg_catalog.pg_auth_members m
        JOIN pg_catalog.pg_roles b ON (m.roleid = b.oid)
        WHERE m.member = r.oid) as memberof
, r.rolreplication
, r.rolauditadmin
, r.rolsystemadmin
, r.rolmonitoradmin
, r.roloperatoradmin
, r.rolpolicyadmin
, r.roluseft
, r.rolkind
FROM pg_catalog.pg_roles r
WHERE r.rolname not in ('gs_role_copy_files', 'gs_role_signal_backend', 'gs_role_tablespace', 'gs_role_replication', 'gs_role_account_lock', 'gs_role_pldebugger')
ORDER BY 1;
**************************

                                                              List of roles
 Role name |                                                    Attributes                                                    | Member of
-----------+------------------------------------------------------------------------------------------------------------------+-----------
 omm       | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, UseFT | {}
 student   | Sysadmin                                                                                                         | {}

\db 显示数据库中所有表空间信息

复制代码 
openGauss=# \db
********* QUERY **********
SELECT spcname AS "Name",
  pg_catalog.pg_get_userbyid(spcowner) AS "Owner",
  pg_catalog.pg_tablespace_location(oid) AS "Location"
FROM pg_catalog.pg_tablespace
ORDER BY 1;
**************************

             List of tablespaces
    Name    | Owner |        Location
------------+-------+------------------------
 pg_default | omm   |
 pg_global  | omm   |
 student_ts | omm   | tablespace/student_ts1
(3 rows)

\dn 显示数据库中所有 schema 信息

复制代码 
openGauss=# \dn
********* QUERY **********
SELECT n.nspname AS "Name",
  pg_catalog.pg_get_userbyid(n.nspowner) AS "Owner"
FROM pg_catalog.pg_namespace n
WHERE n.nspname !~ '^pg_' AND n.nspname <> 'information_schema'
ORDER BY 1;
**************************

     List of schemas
      Name      |  Owner
----------------+---------
 blockchain     | omm
 cstore         | omm
 db4ai          | omm
 dbe_perf       | omm
 dbe_pldebugger | omm
 pkg_service    | omm
 pmk            | omm
 public         | omm
 snapshot       | omm
 sqladvisor     | omm
 student        | student
(11 rows)

\d 显示当前数据库下相关数据库对象信息(包含表、视图、物化视图、序列、外部表、stream\ contview)

复制代码 
openGauss=# \d
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
  c.reloptions as "Storage"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind IN ('r','v','m','S','f','e','o','')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'db4ai'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

                         List of relations
 Schema |  Name  | Type  | Owner |             Storage
--------+--------+-------+-------+----------------------------------
 public | test   | table | omm   | {orientation=row,compression=no}
 public | v_test | view  | omm   |
(2 rows)

\d tablename 查看某个表的详细信息

复制代码 
openGauss=# \d test
********* QUERY **********
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 ~ '^(test)$'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 2, 3;
**************************

********* QUERY **********
SELECT c.relchecks, c.relkind, c.relhasindex, c.relhasrules, c.relhastriggers, c.relhasoids, '', c.reltablespace, CASE WHEN c.reloftype = 0 THEN '' ELSE c.reloftype::pg_catalog.regtype::pg_catalog.text END, c.relpersistence,c.relhasclusterkey, c.relreplident, (select count(1) as haspolicy from pg_catalog.pg_class WHERE relname = 'pg_rlspolicy')
FROM pg_catalog.pg_class c
 LEFT JOIN pg_catalog.pg_class tc ON (c.reltoastrelid = tc.oid)
WHERE c.oid = '16575';
**************************

********* QUERY **********
SELECT * FROM pg_catalog.pg_class WHERE relname = 'gs_encrypted_columns' AND relnamespace = 11;
**************************

********* QUERY **********
SELECT a.attname,
  pg_catalog.format_type(a.atttypid, a.atttypmod),
  (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 176)
   FROM pg_catalog.pg_attrdef d
   WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef),
  a.attnotnull, a.attnum,
  (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,
  NULL AS indexdef,
  NULL AS attfdwoptions,
 (SELECT pg_catalog.format_type (a.atttypmod, g.data_type_original_mod) AS clientlogic_original_type FROM  gs_encrypted_columns g WHERE g.column_name = a.attname  AND g.rel_id = 16575group by g.data_type_original_oid, g.data_type_original_mod),
(SELECT g.data_type_original_oid AS clientlogic_original_type_oid FROM  gs_encrypted_columns g WHERE g.column_name = a.attname  AND g.rel_id = 16575group by g.data_type_original_oid, g.data_type_original_mod),
 (SELECT  h.adgencol
   FROM pg_catalog.pg_attrdef h
   WHERE h.adrelid = a.attrelid AND h.adnum = a.attnum AND a.atthasdef) AS generated_column
FROM pg_catalog.pg_attribute a
WHERE a.attrelid = '16575' AND a.attnum > 0 AND NOT a.attisdropped AND a.attkvtype != 4 AND a.attname <> 'tableoid' AND a.attname <> 'tablebucketid'
ORDER BY a.attnum;
**************************

********* QUERY **********
SELECT c2.relname, i.indisprimary, i.indisunique, i.indisclustered, i.indisvalid, pg_catalog.pg_get_indexdef(i.indexrelid, 0, true),
  pg_catalog.pg_get_constraintdef(con.oid, true), contype, condeferrable, condeferred, i.indisreplident, c2.reltablespace, i.indisusable
FROM pg_catalog.pg_class c, pg_catalog.pg_class c2, pg_catalog.pg_index i
  LEFT JOIN pg_catalog.pg_constraint con ON (conrelid = i.indrelid AND conindid = i.indexrelid AND contype IN ('p','u','x'))
WHERE c.oid = '16575' AND c.oid = i.indrelid AND i.indexrelid = c2.oid
ORDER BY i.indisprimary DESC, i.indisunique DESC, c2.relname;
**************************

********* QUERY **********
SELECT pol.policyname, pol.policypermissive, trim(pol.policyroles::text, '{}'), pol.policyqual, pol.policycmd
FROM pg_catalog.pg_rlspolicies pol
LEFT JOIN pg_catalog.pg_namespace N on (N.nspname = pol.schemaname)
LEFT JOIN pg_catalog.pg_class C on (pol.tablename = C.relname and C.relnamespace = N.oid)
WHERE C.oid = '16575' ORDER BY 1;
**************************

********* QUERY **********
SELECT c.oid::pg_catalog.regclass FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i WHERE c.oid=i.inhparent AND i.inhrelid = '16575' ORDER BY inhseqno;
**************************

********* QUERY **********
SELECT c.oid::pg_catalog.regclass FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i WHERE c.oid=i.inhrelid AND i.inhparent = '16575' ORDER BY c.oid::pg_catalog.regclass::pg_catalog.text;
**************************

********* QUERY **********
select partkey,partstrategy from pg_partition where parentid = 16575 order by partkey
**************************

     Table "public.test"
 Column |  Type   | Modifiers
--------+---------+-----------
 id     | integer |
Indexes:
    "idx_id_test" btree (id) TABLESPACE pg_default

openGauss=#

\dt 显示当前数据库中所有的表

复制代码 
openGauss=# \dt
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
  c.reloptions as "Storage"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind IN ('r','')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'db4ai'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

                        List of relations
 Schema | Name | Type  | Owner |             Storage
--------+------+-------+-------+----------------------------------
 public | test | table | omm   | {orientation=row,compression=no}
(1 row)

\dt+ 以扩展方式显示当前数据库所有表信息，比起\dt 多了最后一列描述信息

复制代码 
openGauss=# \dt+
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
  pg_catalog.pg_size_pretty(pg_catalog.pg_table_size(c.oid)) as "Size",
  c.reloptions as "Storage",
  pg_catalog.obj_description(c.oid, 'pg_class') as "Description"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind IN ('r','')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'db4ai'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

                                    List of relations
 Schema | Name | Type  | Owner |  Size   |             Storage              | Description
--------+------+-------+-------+---------+----------------------------------+-------------
 public | test | table | omm   | 0 bytes | {orientation=row,compression=no} |
(1 row)

\di 查看当前数据库中索引信息

复制代码 
openGauss=# \di
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
 c2.relname as "Table",
  c.reloptions as "Storage"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
     LEFT JOIN pg_catalog.pg_index i ON i.indexrelid = c.oid
     LEFT JOIN pg_catalog.pg_class c2 ON i.indrelid = c2.oid
WHERE c.relkind IN ('i','I','')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'db4ai'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

                   List of relations
 Schema |    Name     | Type  | Owner | Table | Storage
--------+-------------+-------+-------+-------+---------
 public | idx_id_test | index | omm   | test  |
(1 row)

\di indexname 查看当前数据库某个索引的信息

复制代码 
openGauss=# \di idx_id_test
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
 c2.relname as "Table",
  c.reloptions as "Storage"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
     LEFT JOIN pg_catalog.pg_index i ON i.indexrelid = c.oid
     LEFT JOIN pg_catalog.pg_class c2 ON i.indrelid = c2.oid
WHERE c.relkind IN ('i','I','s','')
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND c.relname ~ '^(idx_id_test)$'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

                   List of relations
 Schema |    Name     | Type  | Owner | Table | Storage
--------+-------------+-------+-------+-------+---------
 public | idx_id_test | index | omm   | test  |
(1 row)

\dv 查看当前数据库视图信息

复制代码 
openGauss=# \dv
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
  c.reloptions as "Storage"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind IN ('v','')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'db4ai'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

            List of relations
 Schema |  Name  | Type | Owner | Storage
--------+--------+------+-------+---------
 public | v_test | view | omm   |
(1 row)

\ds 查看当前数据库序列信息

复制代码 
openGauss=# \ds
********* QUERY **********
SELECT n.nspname as "Schema",
  c.relname as "Name",
  CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'I' THEN 'global partition index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'm' THEN 'materialized view'  WHEN 'e' THEN 'stream' WHEN 'o' THEN 'contview' END as "Type",
  pg_catalog.pg_get_userbyid(c.relowner) as "Owner",
  c.reloptions as "Storage"
FROM pg_catalog.pg_class c
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind IN ('S','')
      AND n.nspname <> 'pg_catalog'
      AND n.nspname <> 'db4ai'
      AND n.nspname <> 'information_schema'
      AND n.nspname !~ '^pg_toast'
      AND c.relname not like 'matviewmap_%'
      AND c.relname not like 'mlog_%'
  AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1,2;
**************************

             List of relations
 Schema | Name |   Type   | Owner | Storage
--------+------+----------+-------+---------
 public | sq1  | sequence | omm   |
(1 row)
相关推荐
远方160937 分钟前
14-Oracle 23ai Vector Search 向量索引和混合索引-实操
数据库·ai·oracle
GUIQU.2 小时前
【Oracle】数据仓库
数据库·oracle
恰薯条的屑海鸥2 小时前
零基础在实践中学习网络安全-皮卡丘靶场（第十六期-SSRF模块）
数据库·学习·安全·web安全·渗透测试·网络安全学习
咖啡啡不加糖2 小时前
Redis大key产生、排查与优化实践
java·数据库·redis·后端·缓存
曼汐 .2 小时前
数据库管理与高可用-MySQL高可用
数据库·mysql
2301_793102493 小时前
Linux——MySql数据库
linux·数据库
喵叔哟3 小时前
第4章：Cypher查询语言基础
数据库
刘 大 望3 小时前
数据库-联合查询(内连接外连接)，子查询，合并查询
java·数据库·sql·mysql
从零开始学习人工智能3 小时前
Doris 数据库深度解析：架构、原理与实战应用
数据库·架构
LiRuiJie4 小时前
深入剖析MySQL锁机制，多事务并发场景锁竞争
数据库·mysql
热门推荐
01【图像处理与机器视觉】XJTU期末考点02KGG转MP3工具|非KGM文件|解密音频03YOLOv8入门 | 重要性能衡量指标、训练结果评价及分析及影响mAP的因素【发论文关注的指标】04海康Visionmaster-常见问题排查方法-启动阶段05从零安装 LLaMA-Factory 微调 Qwen 大模型成功及所有的坑06【SpeedAI科研小助手】2分钟极速解决知网维普重复率、AIGC率过高，一键全文降！文件格式不变，公式都保留的！07Coze扣子平台完整体验和实践（附国内和国际版对比）08DeepSeek各版本说明与优缺点分析09VMware虚拟机安装Win7专业版保姆级教程（附镜像包）10坚果投影仪J10如何用苹果Siri开关机并和米家联动