BULK收集到一个物体表

Question

在尝试使用BULK COLLECT语句时,我收到了错误ORA-00947: not enough values.

示例脚本:

CREATE OR REPLACE 
TYPE company_t AS OBJECT ( 
   Company          VARCHAR2(30),
   ClientCnt            INTEGER   );
/

CREATE OR REPLACE 
TYPE company_set AS TABLE OF company_t;    
/

CREATE OR REPLACE 
FUNCTION piped_set (
  v_DateBegin IN DATE,
  v_DateEnd IN DATE
)
return NUMBER /*company_set pipelined*/ as
  v_buf company_t := company_t( NULL, NULL);
  atReport company_set;
  sql_stmt VARCHAR2(500) := '';
begin

select * BULK COLLECT INTO atReport
from (
   SELECT 'Descr1', 1 from dual
   UNION
   SELECT 'Descr2', 2 from dual ) ;

  return 1;
end;

错误发生在该行select * BULK COLLECT INTO atReport.

直接PL/SQL顺便说一下(所以不需要提及它作为解决方案).使用BULK COLLECT到用户表类型是个问题.

Answer 1

您company_set是一个对象表,您正在选择值,而不是由这些值组成的对象.这将编译:

select * BULK COLLECT INTO atReport
from (
   SELECT company_t('Descr1', 1) from dual
   UNION
   SELECT company_t('Descr2', 2) from dual ) ;

...但是当run会抛出ORA-22950: cannot ORDER objects without MAP or ORDER method因为union隐式排序来识别和删除重复项时,所以请union all改用:

select * BULK COLLECT INTO atReport
from (
   SELECT company_t('Descr1', 1) from dual
   UNION ALL
   SELECT company_t('Descr2', 2) from dual ) ;