系统表

SELECT * FROM hologres.hg_table_properties where table_name = '<tablename>';

select hg_dump_script('<tablename>'); -- 表DDL
select hg_dump_script('<viewname>');  -- 视图DDL

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
WHERE
    d.datname != 'postgres'
    AND d.datname != 'template0'
    AND d.datname != 'template1'
ORDER BY
    1;

SELECT
    um.srvname AS "Server",
    um.usename AS "User name"
FROM
    pg_catalog.pg_user_mappings um
WHERE
    um.srvname != 'query_log_store_server'
ORDER BY
    1,
    2;

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'
    AND n.nspname != 'hologres'
    AND n.nspname != 'hologres_sample'
    AND n.nspname != 'hologres_statistic'
    AND n.nspname !~ '^hg_'
    AND n.nspname !~ '^holo_'
ORDER BY
    1;

SELECT
    n.nspname AS "Schema",
    c.relname AS "Name",
    CASE c.relkind
    WHEN 'r' THEN
        'table'
    WHEN 'v' THEN
        'view'
    WHEN 'm' THEN
        'materialized view'
    WHEN 'i' THEN
        'index'
    WHEN 'S' THEN
        'sequence'
    WHEN 's' THEN
        'special'
    WHEN 'f' THEN
        'foreign table'
    WHEN 'p' THEN
        'partitioned table'
    WHEN 'I' THEN
        'partitioned index'
    END AS "Type",
    pg_catalog.pg_get_userbyid(c.relowner) AS "Owner"
FROM
    pg_catalog.pg_class c
    LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE
    c.relkind IN ('r', 'p', 'v', 'm', 'S', 'f', '')
    AND n.nspname <> 'pg_catalog'
    AND n.nspname <> 'information_schema'
    AND n.nspname !~ '^pg_toast'
    AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY
    1,
    2;

--查看当前DB下所有表（包含系统表）
SELECT * FROM pg_tables


--查看当前schema下所有表以及表owner（不包含系统表）
SELECT  n.nspname as "Schema"
        ,c.relname as "Name"
        ,CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'm' THEN 'materialized view' WHEN 'i' THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f' THEN 'foreign table' WHEN 'p' THEN 'partitioned table' WHEN 'I' THEN 'partitioned index' END as "Type"
        ,pg_catalog.pg_get_userbyid(c.relowner) as "Owner"
FROM    pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_namespace n
ON      n.oid = c.relnamespace
WHERE   c.relkind IN ('r','p','v','m','S','f','')
and     n.nspname <> 'pg_catalog'
and     n.nspname <> 'information_schema'
and     n.nspname !~ '^pg_toast'
and     pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 1, 2;
            

-- 含分区键值
SELECT  c.oid::pg_catalog.regclass
        ,c.relkind
        ,pg_catalog.pg_get_expr(c.relpartbound, c.oid)
FROM    pg_catalog.pg_class c
        ,pg_catalog.pg_inherits i
WHERE   c.oid = i.inhrelid
AND     i.inhparent::pg_catalog.regclass = 'parent_table_name'::pg_catalog.regclass
ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT'
;



-- 不含分区键值
SELECT
    nmsp_parent.nspname AS parent_schema,
    parent.relname      AS parent,
    nmsp_child.nspname  AS child_schema,
    child.relname       AS child
FROM pg_inherits
    JOIN pg_class parent            ON pg_inherits.inhparent = parent.oid
    JOIN pg_class child             ON pg_inherits.inhrelid   = child.oid
    JOIN pg_namespace nmsp_parent   ON nmsp_parent.oid  = parent.relnamespace
    JOIN pg_namespace nmsp_child    ON nmsp_child.oid   = child.relnamespace
WHERE parent.relname='parent_table_name';

select
        cn.nspname as child_schema_name,c.relname as child_table_name,
        pn.nspname as parent_schema_name,p.relname as parent_table_name,
        to_timestamp(cp.property_value::bigint) as create_time
from pg_inherits i
left join pg_class p on p.oid=i.inhparent
left join pg_namespace pn on pn.oid = p.relnamespace
left join pg_class c on c.oid=i.inhrelid
left join pg_namespace cn on cn.oid = c.relnamespace
left join hologres.hg_table_properties cp on cp.property_key='create_time' and cp.table_namespace=pn.nspname and cp.table_name = c.relname;

SELECT  n.nspname
        ,c.relname
        ,s.srvname
        ,pg_catalog.array_to_string(
            ARRAY(
                SELECT pg_catalog.quote_ident(option_name) || ' ' || pg_catalog.quote_literal(option_value) FROM pg_catalog.pg_options_to_table(ftoptions)
            )
            ,', '
        )
FROM    pg_catalog.pg_foreign_table f
        ,pg_catalog.pg_foreign_server s
        ,pg_catalog.pg_class c
        ,pg_catalog.pg_namespace n
WHERE   s.oid = f.ftserver
and     c.oid = f.ftrelid
and     c.relnamespace = n.oid
and     n.nspname not in ('hologres', 'hologres_statistic', 'pg_catalog', 'pg_toast')
;
            

SELECT
    n.nspname AS "Schema",
    c.relname AS "Name",
    CASE c.relkind
    WHEN 'r' THEN
        'table'
    WHEN 'v' THEN
        'view'
    WHEN 'm' THEN
        'materialized view'
    WHEN 'i' THEN
        'index'
    WHEN 'S' THEN
        'sequence'
    WHEN 's' THEN
        'special'
    WHEN 'f' THEN
        'foreign table'
    WHEN 'p' THEN
        'partitioned table'
    WHEN 'I' THEN
        'partitioned index'
    END AS "Type",
    pg_catalog.pg_get_userbyid(c.relowner) AS "Owner"
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 <> 'information_schema'
    AND n.nspname !~ '^pg_toast'
    AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY
    1,
    2;

select * from information_schema.view_table_usage where table_name = '<table_name>';

SELECT
    r.rolname,
    r.rolsuper,
    r.rolinherit,
    r.rolcreaterole,
    r.rolcreatedb,
    r.rolcanlogin,
    r.rolconnlimit,
    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.rolbypassrls
FROM
    pg_catalog.pg_roles r
WHERE
    r.rolname !~ '^pg_'
ORDER BY
    1;

SELECT
    e.extname AS "Name",
    e.extversion AS "Version",
    n.nspname AS "Schema",
    c.description AS "Description"
FROM
    pg_catalog.pg_extension e
    LEFT JOIN pg_catalog.pg_namespace n ON n.oid = e.extnamespace
    LEFT JOIN pg_catalog.pg_description c ON c.objoid = e.oid
        AND c.classoid = 'pg_catalog.pg_extension'::pg_catalog.regclass
WHERE
    e.extname != 'hg_admin_cmd'
    AND e.extname != 'holo_dump_stat'
    AND e.extname != 'holo_funcs'
    AND e.extname != 'holo_link'
    AND e.extname != 'holo_system_admin'
    AND e.extname != 'holo_dump_stat'
    AND e.extname != 'query_log'
    AND e.extname != 'plpgsql'
ORDER BY
    1;

SELECT * FROM pg_roles where rolname='<uid>'

SELECT  r.rolname
        ,r.rolsuper
        ,r.rolinherit
        ,r.rolcreaterole
        ,r.rolcreatedb
        ,r.rolcanlogin
        ,r.rolconnlimit
        ,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.rolbypassrls
FROM    pg_catalog.pg_roles r
WHERE   r.rolname !~ '^pg_'
ORDER BY 1;

SELECT current_database()::information_schema.sql_identifier AS table_catalog,
    nc.nspname::information_schema.sql_identifier AS table_schema,
    c.relname::information_schema.sql_identifier AS table_name,
        CASE
            WHEN nc.oid = pg_my_temp_schema() THEN 'LOCAL TEMPORARY'::text
            WHEN c.relkind = ANY (ARRAY['r'::"char", 'p'::"char"]) THEN 'BASE TABLE'::text
            WHEN c.relkind = 'v'::"char" THEN 'VIEW'::text
            WHEN c.relkind = 'f'::"char" THEN 'FOREIGN'::text
            ELSE NULL::text
        END::information_schema.character_data AS table_type,
        CASE
            WHEN (c.relkind = ANY (ARRAY['r'::"char", 'p'::"char"])) OR (c.relkind = ANY 
(ARRAY['v'::"char", 'f'::"char"])) AND (pg_relation_is_updatable(c.oid::regclass, false) 
& 8) = 8 THEN 'YES'::text
            ELSE 'NO'::text
        END::information_schema.yes_or_no AS is_insertable_into,
        CASE
            WHEN t.typname IS NOT NULL THEN 'YES'::text
            ELSE 'NO'::text
        END::information_schema.yes_or_no AS is_typed,
    NULL::character varying::information_schema.character_data AS commit_action
   FROM pg_namespace nc
     JOIN pg_class c ON nc.oid = c.relnamespace
     LEFT JOIN (pg_type t
     JOIN pg_namespace nt ON t.typnamespace = nt.oid) ON c.reloftype = t.oid
  WHERE (c.relkind = ANY (ARRAY['r'::"char", 'v'::"char", 'f'::"char", 'p'::"char"])) AND 
NOT pg_is_other_temp_schema(nc.oid) AND (pg_has_role('<USERID>', c.relowner, 'USAGE'::text)
 OR has_table_privilege('<USERID>', c.oid, 'SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER'::text)
 OR has_any_column_privilege('<USERID>', c.oid, 'SELECT, INSERT, UPDATE, REFERENCES'::text));

select rolname from pg_roles where has_table_privilege(rolname, '<schemaname>.<tablename>',
 'SELECT,INSERT,UPDATE,DELETE,TRUNCATE,REFERENCES,TRIGGER');