通过数据库链接立即执行 [英] execute immediate over database link

问题描述

是否可以通过数据库链接在远程数据库上执行动态PL/SQL?

Is it possible to execute dynamic PL/SQL on a remote database via a databse link?

我正在寻找类似的东西:

I'm looking for something like:

l_stmt := 'begin null; end;';
execute immediate l_stmt@dblink;

上面的语法显然是错误的，我得到 PLS-00201:必须声明标识符'L_STMT @ DBLINK'.

The syntax above is obviously wrong, I get PLS-00201: identifier 'L_STMT@DBLINK' must be declared.

可以远程创建一个过程，然后执行它.是否可以在不创建远程过程的情况下执行代码?

It is possible to create a procedure remotely and then execute it. Is there a way to execute code without creating a remote procedure?

我正在尝试解决通过数据库链接传递类型的问题.远程过程需要一个类型为t_id_tab的参数，该参数在远程数据库上定义为

I'm trying to work around passing a type over DB link. A remote procedure requires a parameter of type t_id_tab which is defined on the remote DB as

CREATE OR REPLACE TYPE T_ID_TAB AS TABLE OF NUMBER(12)

推荐答案

您可以通过在远程数据库中调用DBMS_SQL程序包在远程数据库上执行任意代码.

You can execute arbitary code on the remote database by calling the DBMS_SQL package there.

示例:

set serveroutput on

create or replace synonym remote_dbms_sql for dbms_sql@core;

declare
  c  number;
  l_global_name  varchar2(200);
begin
  c := remote_dbms_sql.open_cursor();
  remote_dbms_sql.parse( c, 'select global_name from global_name', dbms_sql.native );
  remote_dbms_sql.define_column( c, 1, l_global_name, 200 );
  dbms_output.put_line( remote_dbms_sql.execute_and_fetch( c ) );
  remote_dbms_sql.column_value( c, 1, l_global_name );
  dbms_output.put_line( l_global_name );
  remote_dbms_sql.close_cursor( c );
end;
/

请注意，对DBMS_SQL.NATIVE的引用是本地的，而不是远程的.您不能引用远程程序包常量，但是大概两个数据库中该常量的实际值是相同的.

Note that the reference to DBMS_SQL.NATIVE is local, not remote. You can't reference remote package constants, but presumably the actual value of this constant is the same in both databases.

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