循環數組提供了錯誤的Oracle

Question

我有功能，如：

create or replace function dedup_temp 
return varchar2 
as 
TYPE OriType IS TABLE OF deduporiginal%ROWTYPE; 
type1 OriType; 
num number; 
begin 
select count(1) into num from deduporiginal; 
select * into type1(num) from deduporiginal where rownum < 125; 


    for i in 1 .. type1.count 
    loop 
    DBMS_OUTPUT.put_line('v_month_va(i): '||type1(i).name); 
    end loop; 

return 'DONE'; 

end dedup_temp; 

它編譯成功，但給錯誤，而與查詢一樣運行它

select dedup_temp() from dual; 

錯誤：

ORA-01422: exact fetch returns more than requested number of rows 
ORA-06512: at "CRESTELDEDUPDEV.DEDUP_TEMP", line 9 
01422. 00000 - "exact fetch returns more than requested number of rows" 
*Cause: The number specified in exact fetch is less than the rows returned. 
*Action: Rewrite the query or change number of rows requested 

Answer 1

如果您想選擇多行，你可以使用批量一個PLSQL表收集：

select * BULK COLLECT into type1 from deduporiginal where rownum < 125; 

更新：，如果你想返回類型1：

我不認爲你可以在使用％ROWTYPE的函數之外創建一個類型對象，所以你可能不得不將它全部打包至包裝：

CREATE OR REPLACE PACKAGE package_name IS 
    TYPE OriType IS TABLE OF deduporiginal%ROWTYPE; 
    FUNCTION dedup_temp RETURN OriType ; 
END package_name ; 
/
CREATE OR REPLACE PACKAGE BODY package_name IS 
FUNCTION dedup_temp RETURN OriType IS 
type1 OriType; 
num number; 
begin 
    select count(1) into num from deduporiginal; 
    select * BULK COLLECT into type1 from deduporiginal where rownum < 125; 


    for i in 1 .. type1.count 
    loop 
    DBMS_OUTPUT.put_line('v_month_va(i): '||type1(i).name); 
    end loop; 

    return type1 ; 
end dedup_temp; 

END package_name ; 
/

，但我敢肯定，你就可以選擇一個內statment使用它：

select package_name.dedup_temp() from dual; 

對於做這樣的事情，你需要一個管道函數

Answer 2

我假設表deduporiginal爲條件返回多於一行rownum < 125

你可能想要的東西，像

create or replace function dedup_temp 
    return varchar2 
as 
    TYPE OriType IS TABLE OF deduporiginal%ROWTYPE; 
    type1 OriType; num number; 
begin 
    --? select count(1) into num from deduporiginal; 
    for r in (
     select * 
     from deduporiginal 
     where rownum < 125 
) loop 

     DBMS_OUTPUT.put_line('v_month_va(i): ' || r.name); 
    end loop; 

    return 'DONE'; 

end dedup_temp;