PLS-00497：不能在INTO列表中的單行和多行（BULK）之間混合

Question

我已經創建了一個採購以使用BULK COLLECT來顯示兩個表中的數據，但我不斷收到此錯誤。

PLS-00497: cannot mix between single row and multi-row (BULK) in INTO list 

但是它的工作原理，如果我刪除BULK COLLECT，包括語句中的where子句。

create or replace PROCEDURE sktReport IS 

    TYPE inventory_table_type is RECORD (
        v_WH_ID     INVENTORY.WH_ID%TYPE, 
        v_wa_Product_quantity_id Product_quantity.ST_ID%TYPE); 
    v_inventory_table inventory_table_type; 
BEGIN 

    SELECT INVENTORY.WH_ID, Product_quantity.ST_ID, 
    BULK COLLECT INTO 
    v_inventory_table.v_WH_ID, 
    v_inventory_table.v_wa_Product_quantity_id, 
    FROM INVENTORY 
    INNER JOIN Product_quantity 
    ON Product_quantity.ST_ID = INVENTORY.ST_ID; 

    FOR i IN v_inventory_table.v_WH_ID..v_inventory_table.v_WH_ID 
    LOOP 
    DBMS_OUTPUT.PUT_LINE ('ID : ' || v_inventory_table.v_WH_ID 
          || ' quantity ID : ' || v_inventory_table.v_in_Product_quantity_id); 
    END LOOP; 

END; 

Answer 1

這裏有一個簡單的展示，我剛寫的，可能會幫助你:)

SET SERVEROUTPUT ON; 
DECLARE 
    TYPE t_some_type IS RECORD (
    the_id NUMBER 
    ,the_name VARCHAR2(1) 
); 
    TYPE t_some_type_tab IS TABLE OF t_some_type; 

    lt_some_record t_some_type; 
    lt_some_array t_some_type_tab := NEW t_some_type_tab(); 
BEGIN 

    WITH some_values AS (
    SELECT 
     DECODE(LEVEL,1,1,2,2,3,3,4,4) AS the_id 
     ,DECODE(LEVEL,1,'A',2,'B',3,'C',4,'D') AS the_name 
    FROM 
     dual 
    CONNECT BY LEVEL < 5 
) 
    SELECT 
    sv.the_id 
    ,sv.the_name 
    BULK COLLECT INTO -- use this to select into an array/collection type variable 
    lt_some_array 
    FROM 
    some_values sv; 

    DBMS_OUTPUT.PUT_LINE(lt_some_array.COUNT); 

    WITH some_values AS (
    SELECT 
     DECODE(LEVEL,1,1,2,2,3,3,4,4) AS the_id 
     ,DECODE(LEVEL,1,'A',2,'B',3,'C',4,'D') AS the_name 
    FROM 
     dual 
    CONNECT BY LEVEL < 5 
) 
    SELECT 
    sv.the_id 
    ,sv.the_name 
    INTO -- use this to select into a regular variables 
    lt_some_record.the_id 
    ,lt_some_record.the_name 
    FROM 
    some_values sv 
    WHERE 
    sv.the_id = 1; 

    DBMS_OUTPUT.PUT_LINE(lt_some_record.the_id||': '||lt_some_record.the_name); 

    -- you can also insert such record into your array type variable 
    lt_some_array := NEW t_some_type_tab(); 
    lt_some_array.EXTEND; -- extend the array type variable (so it could store one more element, than now - which was 0) 
    lt_some_array(lt_some_array.LAST) := lt_some_record; -- assign the first element of array type variable 

    DBMS_OUTPUT.PUT_LINE(lt_some_array.COUNT||' '||lt_some_array(lt_some_array.LAST).the_id||': '||lt_some_array(lt_some_array.LAST).the_name); 

END; 
/

而且，因爲你想通過你的結果進行迭代，你可以使用光標（隱性或顯性）例如

DECLARE 
    -- cursor declaration 
    CURSOR c_some_cursor IS 
    WITH some_values AS (
    SELECT 
     DECODE(LEVEL,1,1,2,2,3,3,4,4) AS the_id 
     ,DECODE(LEVEL,1,'A',2,'B',3,'C',4,'D') AS the_name 
    FROM 
     dual 
    CONNECT BY LEVEL < 5 
) 
    SELECT 
    sv.the_id 
    ,sv.the_name 
    FROM 
    some_values sv; 

BEGIN 
    -- using explicit, earlier declared cursor 
    FOR c_val IN c_some_cursor 
    LOOP 
    DBMS_OUTPUT.PUT_LINE(c_val.the_id||': '||c_val.the_name); 
    END LOOP; 


    -- using implicit, not declared cursor 
    FOR c_val IN (
    WITH some_values AS (
     SELECT 
     DECODE(LEVEL,1,1,2,2,3,3,4,4) AS the_id 
     ,DECODE(LEVEL,1,'A',2,'B',3,'C',4,'D') AS the_name 
     FROM 
     dual 
     CONNECT BY LEVEL < 5 
    ) 
    SELECT 
     sv.the_id 
     ,sv.the_name 
    FROM 
     some_values sv 
) 
    LOOP 
    DBMS_OUTPUT.PUT_LINE(c_val.the_id||': '||c_val.the_name); 
    END LOOP; 
END; 
/

Answer 2

這裏我演示了一個簡單的例子來複制你的場景。請參閱下面的代碼。這可能會幫助你。

SET serveroutput ON; 
DECLARE 
TYPE AV_TEST 
IS 
    RECORD 
    (
    lv_att1 PLS_INTEGER, 
    lv_att2 PLS_INTEGER); 
type av_test_tab 
IS 
    TABLE OF av_test; 
    av_test_tab_av av_test_tab; 
BEGIN 
    NULL; 
    SELECT LEVEL, 
    LEVEL+1 BULK COLLECT 
    INTO av_test_tab_av 
    FROM DUAL 
    CONNECT BY LEVEL < 10; 
    dbms_output.put_line(av_test_tab_av.count); 
    FOR I IN av_test_tab_av.FIRST..av_test_tab_av.LAST 
    LOOP 
    dbms_output.put_line('working fine '||av_test_tab_av(i).lv_att1||' '||av_test_tab_av(i).lv_att2); 
    END LOOP; 
END;