oracle通过DBLINK拷贝某个用户的数据到本地-SP_COPY_DATAS

SP_COPY_DATAS暂不支持LONG类型数据的拷贝。
SP_COPY_DATAS

create or replace procedure SP_COPY_DATAS(
  to_user           varchar2
 ,is_recreate_table varchar2 default 'N'
 ,is_truncate_table varchar2 default 'N'
 ,from_dblink       varchar2
 ,from_user         varchar2 default null
 ,table_filter      varchar2 default null
)
authid current_user
is
--通过DBLINK拷贝数据到本地
/*
create global temporary table GTMP_TABLES (
  TABLE_NAME VARCHAR2(50)
) on commit preserve rows;

create global temporary table GTMP_TEXT  (
  text VARCHAR2(4000),
  type varchar2(20)
) on commit preserve rows;
*/
  v_owner1 varchar2(33)  := (case when from_user is null then null else from_user || '.' end);
  v_module varchar2(100) := 'SP_COPY_DATAS';
  v_sql    varchar2(4000);
  v_date   date := sysdate;

  function get_copy_sql(tb_name varchar2) return varchar2 is
  begin
    return
    ('insert /*+append*/ into '||to_user||'.'||tb_name||' nologging
     select * from '||v_owner1 ||tb_name||'@'||from_dblink);
  end;

  function get_create_sql(tb_name varchar2) return varchar2 is
  begin
    return
    ('create table '||to_user||'.'||tb_name||' nologging parallel 8 as
     select * from '||v_owner1 ||tb_name||'@'||from_dblink||'
     where 1 = 0');
  end;
begin
  --1.确定目标表
  delete from gtmp_tables;
  if from_user is null then
    execute immediate
   'insert into gtmp_tables (table_name)
    select table_name from user_tables@'||from_dblink || '
    where 1 = 1 ' || (case when table_filter is null then null else ' and '||table_filter end);
  else
    execute immediate
   'insert into gtmp_tables (table_name)
    select table_name from all_tables@'||from_dblink||'
    where owner = '''||upper(from_user)||''''
    ||(case when table_filter is null then null else ' and '||table_filter end);
  end if;

  --2.拷贝数据
  sysout(v_module,'BEGIN SP_COPY_DATAS(to_user='||to_user
   ||',from_dblink='||from_dblink
   ||',table_filter='||table_filter||')');

  --2.1禁用约束
  delete from GTMP_TEXT;
  insert into GTMP_TEXT(TEXT,TYPE)
  select 'alter table '||owner||'.'||table_name||' disable constraint '||CONSTRAINT_NAME as text
    ,CONSTRAINT_TYPE
  from all_constraints  t
  where t.owner = upper(to_user)
    and t.CONSTRAINT_NAME not like 'BIN$%';

  sysout(v_module,'disable all constraints');
  for x in (select text from GTMP_TEXT order by type desc) loop
  begin
    execute immediate x.text;
  exception
    when others then
      sysout(v_module, '..' || x.text || ' error: '||sqlerrm);
  end;
  end loop;
  sysout(v_module,'all constraints disabled');

  --2.2 拷贝数据
  sysout(v_module,'copy tables begin');
  for x in (select table_name from gtmp_tables order by table_name) loop
  begin
    if is_recreate_table = 'Y' then
    begin
      execute immediate 'drop table '||to_user||'.'||x.table_name;
    exception
      when others then null;
    end;      
    begin
      execute immediate get_create_sql(x.table_name);
    exception
      when others then null;
    end;
    end if;

    if is_truncate_table = 'Y' then
      execute immediate 'truncate table '||to_user||'.'||x.table_name;
    end if;

    execute immediate get_copy_sql(x.table_name);
    commit;
    sysout(v_module,'..copy ' || x.table_name || ' OK');
  exception
    when others then
      sysout(v_module,'..copy ' || x.table_name || ' error: ' || sqlerrm);
  end;
  end loop;
  sysout(v_module,'copy tables end');

  --2.3 启用约束
  sysout(v_module,'enable all constraints');
  for x in (select text from GTMP_TEXT order by type) loop
  begin
    v_sql := replace(x.text,' disable constraint ',' enable constraint ');
    execute immediate v_sql;
  exception
    when others then
      sysout(v_module, '..' || v_sql || ' error: '||sqlerrm);
  end;
  end loop;
  sysout(v_module,'all constraints enabled');

  sysout(v_module,'END SP_COPY_DATAS. Elapsed time: '||round((sysdate-v_date)*24*3600)||' seconds');
end SP_COPY_DATAS;

sysout

create or replace procedure sysout(
  module_id varchar2
 ,text      varchar2
) is
begin
   dbms_output.put_line(
    to_char(systimestamp,'yyyy-mm-dd hh24:mi:ss.ff3') 
    || ' ['||module_id||'] ' || substr(text, 1, 1000)
   );
end sysout;