pg_dump as insert statements 
pg_dump -d -O database filename
-d ( data as inserts ) -O ( capital O is no owner )

然后使用以下命令将备份文件输送回PostgreSQL:

psql -d database -U username -h hostname < filename

由于没有包含所有者，因此创建的所有表、模式等都是在指定的登录用户下创建的。

我了解到这也是一个在PostgreSQL版本之间迁移的好方法。

可以使用REASSIGN OWNED命令。

剧情简介:

重新分配old_role[，…]到new_role

这将把old_role拥有的所有对象更改为新角色。你不需要考虑用户拥有什么样的对象，它们都会被改变。注意，它只应用于单个数据库中的对象。它也不会改变数据库本身的所有者。

它至少可以在8.2版本中使用。他们的网上资料只能追溯到这段时间。

您可以在PostgreSQL 9中尝试以下操作

DO $$DECLARE r record;
BEGIN
    FOR r IN SELECT tablename FROM pg_tables WHERE schemaname = 'public'
    LOOP
        EXECUTE 'alter table '|| r.tablename ||' owner to newowner;';
    END LOOP;
END$$;

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。

我不得不改变表，视图和序列的所有权，并发现@rjk发布的伟大解决方案工作得很好-尽管有一个细节: 如果对象名称是大小写混合的(例如。"TableName")，这将失败，并报错"not found"。 为了避免这种情况，可以像这样用' " '来包装对象名称:

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;

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