在IN子句中使用Oracle表类型 - 编译失败

Question

只是尝试为我指定的ID获取光标.

CREATE OR REPLACE PACKAGE some_package AS

  TYPE t_cursor IS REF CURSOR;
  TYPE t_id_table IS TABLE OF NVARCHAR(38) INDEX BY PLS_INTEGER;

  PROCEDURE someentity_select(
    p_ids     IN  t_id_table, 
    p_results OUT t_cursor);

END;

CREATE OR REPLACE PACKAGE BODY some_package AS

  PROCEDURE someentity_select(
    p_ids     IN  t_guid_table, 
    p_results OUT t_cursor)
  IS
  BEGIN

    OPEN p_results FOR 
      SELECT * 
      FROM someschema.someentity 
      WHERE id IN (SELECT column_value FROM TABLE(p_ids)); - fails here

  END;

END;

注意:someschema.someentity.id是一个NVARCHAR2(38)

PL/SQL:ORA-00382:表达式类型错误
PL/SQL:ORA-22905:无法访问非嵌套表项的行

我哪里错了？

Answer 1

在12.2之前的Oracle版本中,您只能通过CREATE TYPE语句从数据库中定义的集合类型中进行SELECT,而不是关联数组:

CREATE TYPE t_id_table IS TABLE OF NVARCHAR(38);

CREATE OR REPLACE PACKAGE some_package AS

  PROCEDURE someentity_select(
    p_ids     IN  t_guid_table, 
    p_results OUT SYS_REFCURSOR);

END;

CREATE OR REPLACE PACKAGE BODY some_package AS

  PROCEDURE someentity_select(
    p_ids     IN  t_guid_table, 
    p_results OUT SYS_REFCURSOR)
  IS
  BEGIN

    OPEN p_results FOR 
      SELECT * 
      FROM someschema.someentity 
      WHERE id IN (SELECT column_value FROM TABLE(p_ids));

  END;

END;