如果当前所有者不是postgres，你可以使用这个:

REASSIGN OWNED BY old_role [, ...] TO new_role

但如果当前的所有者是postgres，你肯定会得到错误，所以你必须使用@dvanrensburg回答，但如果你想在相同的sql中执行命令，可以根据需要使用这些命令:

数据库

ALTER DATABASE target_database OWNER TO new_onwer;

表

DO
LANGUAGE plpgsql
$$
DECLARE
  stmt text;
BEGIN
  FOR stmt IN
    WITH temp as (
    SELECT 'ALTER TABLE '|| schemaname || '."' || tablename ||'" OWNER TO newuser' as command
    FROM pg_tables WHERE NOT schemaname IN ('pg_catalog', 'information_schema')
    ORDER BY schemaname, tablename )
    SELECT command from temp
  LOOP
    EXECUTE stmt;
  END LOOP;
END;
$$;

序列

DO
LANGUAGE plpgsql
$$
DECLARE
  stmt text;
BEGIN
  FOR stmt IN
    WITH temp as (
    SELECT 'ALTER SEQUENCE '|| sequence_schema || '."' || sequence_name ||'" OWNER TO newuser;' as command
    FROM information_schema.sequences WHERE NOT sequence_schema IN ('pg_catalog', 'information_schema')
    ORDER BY sequence_schema, sequence_name)
    select command from temp
  LOOP
    EXECUTE stmt;
  END LOOP;
END;
$$;

的观点

DO
LANGUAGE plpgsql
$$
DECLARE
  stmt text;
BEGIN
  FOR stmt IN
    WITH temp as (
    SELECT 'ALTER VIEW '|| table_schema || '."' || table_name ||'" OWNER TO newuser;' as command
    FROM information_schema.views WHERE NOT table_schema IN ('pg_catalog', 'information_schema')
    ORDER BY table_schema, table_name)
    select command from temp
  LOOP
    EXECUTE stmt;
  END LOOP;
END;
$$;

模式

DO
LANGUAGE plpgsql
$$
DECLARE
  stmt text;
BEGIN
  FOR stmt IN
    WITH schema_names as(
    SELECT distinct(schemaname) FROM pg_tables WHERE NOT schemaname IN ('pg_catalog', 'information_schema')
    ORDER BY schemaname)
    SELECT 'ALTER SCHEMA '|| schemaname ||' OWNER TO newuser;' as command
    FROM schema_names
  LOOP
    EXECUTE stmt;
  END LOOP;
END;
$$;

还要注意数据库中可能需要更改成员关系的函数和其他组件

函数和触发函数

    DO
    LANGUAGE plpgsql
    $$
    DECLARE
      stmt text;
    BEGIN
      FOR stmt IN
        WITH temp as(
        SELECT 'alter function '||nsp.nspname||'.'||p.proname||'('||pg_get_function_identity_arguments(p.oid)||') owner to newuser;' as command
        FROM pg_proc p
        JOIN pg_namespace nsp ON p.pronamespace = nsp.oid
        WHERE NOT  nsp.nspname IN ('pg_catalog', 'information_schema'))
        SELECT command FROM temp
      LOOP
        EXECUTE stmt;
      END LOOP;
    END;
    $$;

虽然下面没有改变所有者，但改变了角色，这是我需要做的，当搜索谷歌时，我结束了这个问题，所以为了完整性起见，我将在这里输入:

对我来说，上述解决方案都不起作用，我一直得到:必须是关系xxx的所有者。最终的解决方案是:

格兰特·olduser

如果希望在一条sql语句中完成，则需要定义一个exec()函数，如http://wiki.postgresql.org/wiki/Dynamic_DDL中所述

CREATE FUNCTION exec(text) returns text language plpgsql volatile
  AS $f$
    BEGIN
      EXECUTE $1;
      RETURN $1;
    END;
$f$;

然后你可以执行这个查询，它会改变表，序列和视图的所有者:

SELECT exec('ALTER TABLE ' || quote_ident(s.nspname) || '.' ||
            quote_ident(s.relname) || ' OWNER TO $NEWUSER')
  FROM (SELECT nspname, relname
          FROM pg_class c JOIN pg_namespace n ON (c.relnamespace = n.oid) 
         WHERE nspname NOT LIKE E'pg\\_%' AND 
               nspname <> 'information_schema' AND 
               relkind IN ('r','S','v') ORDER BY relkind = 'S') s;

$NEWUSER是新所有者的postgresql新名称。

在大多数情况下，您需要超级用户才能执行此操作。可以通过将所有者从您自己的用户更改为您所属的角色组来避免这种情况。

感谢RhodiumToad在#postgresql上的帮助。

ansible非常简单。你也可以跳过obj_type来修改任何对象类型的所有权。

- name: Reassigner owner of all objects
  postgresql_owner:
    login_user: "{{ postgres_admin_username }}"
    login_unix_socket: "{{postgres_socket}}"
    db: "db-name"
    new_owner: "new-owner"
    reassign_owned_by: "old-owner"
    obj_type: "table"

以下是带有进一步信息的文档:https://docs.ansible.com/ansible/latest/collections/community/general/postgresql_owner_module.html

希望这能有所帮助。

从其他人的讨论来看，他们不同意我的问题。如前所述，如果所有者是postgres, REASSIGN OWNED不工作。所以，受之前讨论的启发，我写了这个脚本:

CREATE OR REPLACE FUNCTION public.alt_own_onall (v_new_owner text)
    RETURNS void
    LANGUAGE plpgsql
AS $alt_own_onall$
-- ALTer OWNer ON ALL objects
DECLARE
    r           RECORD;
    v_sqlcmd    TEXT; -- commande SQL
    b_modif     BOOLEAN DEFAULT false;    -- si au moins une modif
BEGIN
    v_new_owner := quote_ident (v_new_owner);
    IF v_new_owner NOT IN
        (SELECT role_name FROM information_schema.enabled_roles WHERE role_name <>'postgres')
        THEN
            RAISE WARNING '[%] est inconnu', v_new_owner;
            RETURN;
    END IF
    ; -- tables
    RAISE INFO 'Le nouveau propriétaire des tables, vues, fonctions, schémas et de la base va être [%]', v_new_owner
    ;
    FOR r IN
        SELECT quote_ident(schemaname) || '.' || quote_ident(tablename) sch_tbl
        FROM pg_catalog.pg_tables
        WHERE schemaname !~'^(pg_|information)' AND tableowner <> v_new_owner
    LOOP
        v_sqlcmd := 'ALTER TABLE ' || r.sch_tbl || ' OWNER TO ' || v_new_owner || ';';
        RAISE INFO 'Exécution de [%]', v_sqlcmd;
        EXECUTE v_sqlcmd;
        b_modif := true;
    END LOOP
    ; -- views
    FOR r IN
        SELECT quote_ident(schemaname) || '.' || quote_ident(viewname) v_sch_nam
        FROM pg_catalog.pg_views
        WHERE schemaname !~'^(pg_|information)' AND viewowner <> v_new_owner
    LOOP
        v_sqlcmd := 'ALTER VIEW '|| r.v_sch_nam ||' OWNER TO ' || v_new_owner || ';';
        RAISE INFO 'Exécution de [%]', v_sqlcmd;
        EXECUTE v_sqlcmd;
        b_modif := true;
    END LOOP
    ; -- séquences
/*
    ERROR:  cannot change owner of sequence "*_seq"
    DETAIL:  Sequence "*_seq" is linked to table "*".

    FOR r IN
        SELECT quote_ident(sequence_schema) || '.' || quote_ident(sequence_name) s_sch_nam
        FROM information_schema.sequences
        WHERE sequence_schema !~'^(pg_|information)'
    LOOP
        EXECUTE 'ALTER SEQUENCE ' || r.s_sch_nam || ' OWNER TO ' || v_new_owner || ';'
        ;
    END LOOP
    ; -- fonctions */
    FOR r IN
        SELECT
            quote_ident (n.nspname) || '.' || quote_ident (p.proname) || '(' ||
            pg_get_function_identity_arguments (p.oid) || ')' AS nsp_pro_arg
        FROM pg_proc AS p
            JOIN pg_namespace   AS n ON p.pronamespace    = n.oid
            JOIN pg_authid      AS a ON p.proowner        = a.oid
        WHERE n.nspname !~'^(pg_|information)' AND quote_ident(a.rolname) <> v_new_owner
    LOOP
        v_sqlcmd := 'ALTER FUNCTION ' || r.nsp_pro_arg || ' OWNER TO ' || v_new_owner || ';';
        RAISE INFO 'Exécution de [%]', v_sqlcmd;
        EXECUTE v_sqlcmd;
        b_modif := true;
    END LOOP
    ; -- schémas
    FOR r IN
        SELECT quote_ident(schema_name) s_nam
        FROM information_schema.schemata
        WHERE schema_name !~'^(pg_|information)' AND quote_ident(schema_owner) <> v_new_owner
    LOOP
        v_sqlcmd := 'ALTER SCHEMA ' || r.s_nam || ' OWNER TO ' || v_new_owner || ';';
        RAISE INFO 'Exécution de [%]', v_sqlcmd;
        EXECUTE v_sqlcmd;
        b_modif := true;
    END LOOP
    ; -- base
    FOR r IN
        SELECT d.datname, a.rolname
        FROM pg_database d JOIN pg_authid a ON d.datdba=a.oid
        WHERE d.datname=current_database() AND a.rolname <> v_new_owner
    LOOP
        v_sqlcmd := 'ALTER DATABASE ' || quote_ident(current_database()) || ' OWNER TO ' || v_new_owner || ';';
        RAISE INFO 'Exécution de [%]', v_sqlcmd;
        EXECUTE v_sqlcmd;
        b_modif := true;
    END LOOP
    ;
    IF NOT b_modif THEN RAISE INFO 'Aucune modification n''a été effectuée.'; END IF;
END
;$alt_own_onall$;

在PSQL下使用它: SELECT alt_own_onall ('new_role_name'); 你必须把法语信息翻译成你自己的语言。 适用于pg 9.5

http://archives.postgresql.org/pgsql-bugs/2007-10/msg00234.php也是一个很好的快速解决方案，适用于一个数据库中的多个模式:

表

SELECT 'ALTER TABLE '|| schemaname || '."' || tablename ||'" OWNER TO my_new_owner;'
FROM pg_tables WHERE NOT schemaname IN ('pg_catalog', 'information_schema')
ORDER BY schemaname, tablename;

序列

SELECT 'ALTER SEQUENCE '|| sequence_schema || '."' || sequence_name ||'" OWNER TO my_new_owner;'
FROM information_schema.sequences WHERE NOT sequence_schema IN ('pg_catalog', 'information_schema')
ORDER BY sequence_schema, sequence_name;

的观点

SELECT 'ALTER VIEW '|| table_schema || '."' || table_name ||'" OWNER TO my_new_owner;'
FROM information_schema.views WHERE NOT table_schema IN ('pg_catalog', 'information_schema')
ORDER BY table_schema, table_name;

物化视图

基于这个答案

SELECT 'ALTER TABLE '|| oid::regclass::text ||' OWNER TO my_new_owner;'
FROM pg_class WHERE relkind = 'm'
ORDER BY oid;

这将生成所有必需的ALTER TABLE / ALTER SEQUENCE / ALTER VIEW语句，复制这些语句并将它们粘贴回plsql以运行它们。

检查你在psql中的工作，执行以下操作:

\dt *.*
\ds *.*
\dv *.*