如何在结果集中包含单行多列子查询（PIPELINED函数）结果

Question

我正在使用 Oracle 11g。

所以，假设我有一个像这样的测试数据 table

with test_data as (
    select 1 as id, 'John' as name from dual 
        union all
    select 2 as id, 'Jack' as name from dual
        union all
    select 3 as id, 'Peter' as name from dual
)

我还有一个 piplined 函数，每次调用 return 一行，多列像下面这样：

CREATE OR REPLACE PACKAGE MY_PACK AS
  TYPE result_record is RECORD(
   surname           varchar2(27),
   telephone          varchar2(50),
   place_of_birth     varchar2(50)
       );

  TYPE result_table IS TABLE OF result_record;
  function runPipe(id number) RETURN result_table PIPELINED;
END ERC_PACK;
/

CREATE OR REPLACE PACKAGE BODY MY_PACK AS
    function runPipe(id number) RETURN result_table PIPELINED IS
    rec           result_record:=null;
    begin
       if  (id=1) then
         select 'Smih','139289289','Paris' into rec from dual;
       end if;
       if  (id=2) then
         select 'Lock','1888888888','London' into rec from dual;
       end if;
       if  (id=3) then
         select 'May','99999999999','Berlin' into rec from dual;
       end if;
       pipe row (rec);
       return;
  end;
END ERC_PACK;
/

当然还有

select * from table(MY_PACK.runPipe(1))

return秒

Smih    139289289   Paris

现在我想要一个 select 语句，它将 return test_data 的所有行以及来自管道函数

的相应值

例如像

select test_data.*, (select * from table(MY_PACK.runPipe(id))) from test_data

哪个当然不行 但是预期结果会是这样的：

1 John  Smih    139289289   Paris
2 Jack  Lock    1888888888  London
3 Peter May     99999999999 Berlin

那么在给定test_data table 和pipelined 函数的情况下，如何实现上述预期结果呢？

Answer 1

你可以使用 OUTER APPLY:

select td.*, s.*
from test_data td
outer apply (select * from table(MY_PACK.runPipe(td.id))) s

Answer 2

试试这个 select :

    with test_data as (
    select 1 as id, 'John' as name from dual 
        union all
    select 2 as id, 'Jack' as name from dual
        union all
    select 3 as id, 'Peter' as name from dual
)
select td.*, s.*
from test_data td
LEFT JOIN  table(MY_PACK.runPipe(td.id)) s ON 1 = 1;

Answer 3

请尝试使用别名

with test_data as (
select 1 as id, 'John' as name from dual 
    union all
select 2 as id, 'Jack' as name from dual
    union all
select 3 as id, 'Peter' as name from dual
)
select * from table(MY_PACK.runPipe(test_data.id))) from test_data

如何在结果集中包含单行多列子查询（PIPELINED函数）结果

How to include single row multiple column subquery (PIPELINED function) results in the result set

sql

oracle

plsql

pipelined-function