Question

我创建了一些Oracle类型：

create or replace TYPE "RESULTS_ADMIN" AS OBJECT 
(
  ROWNUMBER NUMBER,
  ASSET_ID VARCHAR2(1000 CHAR),
  BOOK_ID VARCHAR2(10 CHAR),
  asset_name VARCHAR2(50 CHAR) ,
  book_author VARCHAR2(30 CHAR) , 
  asset_location VARCHAR2(30 CHAR), 
  asset_cat VARCHAR2(50 CHAR), 
  asset_type VARCHAR2(10 CHAR), 
  publisher_name VARCHAR2(50 CHAR),
  books_available NUMBER
);

create or replace TYPE "RESULT_ADMIN_TEMP" is table of LMS.results_admin;

以下是使用它们的程序：

create or replace PROCEDURE "RETRIEVE_ASSET_ADMIN" (
     aid IN asset_details.asset_id%TYPE,
      aname IN asset_details.asset_name%TYPE,
      acat IN asset_details.asset_cat%type,
      atypeid IN asset_details.asset_type_id%type,
      bauthor IN asset_details.book_author%type,
      aloc IN asset_details.asset_location%type,
      pub IN asset_publisher.publisher_name%type,
      pagenumber IN number,
      asset_cur OUT SYS_REFCURSOR    )
is 
    v_fpgnbr number;
    v_pgsize number;
    v_frec number;
    v_lrec number;
    v_totrows number;
    result_admin_temp_table result_admin_temp;
begin
  v_fpgnbr := pagenumber;
  v_pgsize :=10;
  v_frec := (v_fpgnbr - 1 ) * v_pgsize;
  v_lrec := ( v_fpgnbr * v_pgsize + 1 ); 
  select  row_number() over (order by a.asset_id) as rownum,
          a.asset_id, 
          a.book_id, 
          asset_name ,
          book_author , 
          asset_location, 
          asset_cat , 
          l.asset_type, 
          p.publisher_name,
          c.books_available
      bulk collect into result_admin_temp_table
  from asset_details a join asset_count c 
      on a.book_id=c.book_id 
      join asset_lookup_details l 
      on a.asset_type_id=l.asset_type_id 
      join asset_publisher p
      on a.book_id = p.book_id
  where (aid is NULL or a.asset_id = aid ) and 
      (aname is NULL or asset_name like '%'||aname||'%') and 
      (bauthor is NULL or book_author like '%'||bauthor||'%') and 
      (aloc like '%SELECT%' or asset_location like '%'|| aloc ||'%') and 
      (acat like '%SELECT%' or asset_cat like '%'||acat||'%') and 
      (atypeid = 0 or a.asset_type_id = atypeid) and
      (pub is NULL or p.publisher_name like '%'||pub||'%');
  open asset_cur for
  select 
      asset_id, 
      book_id, 
      asset_name ,
      book_author , 
      asset_location, 
      asset_cat , 
      asset_type, 
      publisher_name,
      books_available 
  from table(result_admin_temp_table)
  where 
  rownum > v_frec and rownum < v_lrec
  order by rownum asc;
end RETRIEVE_ASSET_ADMIN;

在编写代码时，我得到了ORA-00947: Not enough values error at the "bulkcollect into result_admin_temp_table" point。我已经尝试了很多东西来搜索互联网以找到解决方案。你能告诉我哪里出错了吗？

Answer 1

这就是您收到该消息的原因：您正在选择嵌套表。 Oracle不会为您输出一个类型的结果集：您需要自己完成。

select RESULTS_ADMIN(
          row_number() over (order by a.asset_id),
          a.asset_id, 
          a.book_id, 
          asset_name ,
          book_author , 
          asset_location, 
          asset_cat , 
          l.asset_type, 
          p.publisher_name,
          c.books_available )
  bulk collect into result_admin_temp_table
  from asset_details a join asset_count c 
      on a.book_id=c.book_id 
      join asset_lookup_details l 
      on a.asset_type_id=l.asset_type_id 
      join asset_publisher p
      on a.book_id = p.book_id)

其他一些观察结果：

请勿使用rownum作为别名。 ROWNUM为an Oracle keyword，因此您的查询无法按照您的想法运作。
您正在使用整个结果集填充嵌套表。集合位于会话内存中。如果查询返回了很多结果 - 并且考虑到参数有多模糊，我猜它有时会 - 这个集合可能会变得太大并且会超出PGA限制。
在数据库中运行分页查询是个糟糕的主意。没有人想把业务逻辑放在数据库中，但是每个人都希望将表示逻辑放在那里。摇头

最后，您可以使用简单的内联查询来避免集合的开销：

open asset_cur for
  select 
      asset_id, 
      book_id, 
      asset_name ,
      book_author , 
      asset_location, 
      asset_cat , 
      asset_type, 
      publisher_name,
      books_available 
  from (  select  row_number() over (order by a.asset_id) as rn,
              a.asset_id, 
              a.book_id, 
              asset_name ,
              book_author , 
              asset_location, 
              asset_cat , 
              l.asset_type, 
              p.publisher_name,
              c.books_available
          bulk collect into result_admin_temp_table
      from asset_details a join asset_count c 
          on a.book_id=c.book_id 
          join asset_lookup_details l 
          on a.asset_type_id=l.asset_type_id 
          join asset_publisher p
          on a.book_id = p.book_id
      where (aid is NULL or a.asset_id = aid ) and 
          (aname is NULL or asset_name like '%'||aname||'%') and 
          (bauthor is NULL or book_author like '%'||bauthor||'%') and 
          (aloc like '%SELECT%' or asset_location like '%'|| aloc ||'%') and 
          (acat like '%SELECT%' or asset_cat like '%'||acat||'%') and 
          (atypeid = 0 or a.asset_type_id = atypeid) and
          (pub is NULL or p.publisher_name like '%'||pub||'%')
          ) t
  where t.rn > v_frec and t.rn < v_lrec
  order by t.rn asc;

ORA-00947：将值放入过程内的类型时没有足够的值

1 个答案: