PL/SQL：ORA-00932：不一致的數據類型：期望的NUMBER得到USER_NAME.VARCHAR_ARRAY

Question

以下是我創建的函數，用於接受varchar2項的數組並返回該記錄的內部pk，該記錄是NUMBER記錄。我正在努力獲得將VARCHAR_ARRAY類型的數組傳遞給遊標中的簡單sql查詢的語法，並返回類型爲NUMBER_ARRAY的變量。錯誤在第8,42行，即FROM table_name WHERE column_name IN VARCHAR_ARRAY被傳遞給該函數。請幫助我解決這個錯誤，因爲我正在學習plsql。

create or replace TYPE VARCHAR_ARRAY AS VARRAY(1000000) OF VARCHAR2(1000); 
/

    create or replace TYPE NUMBER_ARRAY AS VARRAY(1000000) OF NUMBER; 
/

    create or replace Function GET_PRODUCT_ID_ARR(V_PRODUCT_NUM_ARR IN VARCHAR_ARRAY) 
    RETURN NUMBER_ARRAY 
    IS 
    product_id_list number_array := number_array(); 
    CURSOR c1 
    IS 
    SELECT cat_map_id 
    FROM mn_cat_map WHERE product_num IN (V_PRODUCT_NUM_ARR) and catalog_type = 'INT'; 
    v_output NUMBER; 
    BEGIN 
     OPEN c1; 
     LOOP 
      fetch c1 into product_id_list; 
      EXIT WHEN c1%notfound; 
      product_id_list.extend; 
      product_id_list(product_id_list.count) := v_output; 
     dbms_output.put_line('Product ('||v_output ||'):'||product_id_list(v_output)); 
     END LOOP; 
    Close c1; 
    RETURN product_id_list; 
    END; 
/

Answer 1

有兩個問題：

1. 你要投varray表：

   CURSOR c1 
   IS 
   SELECT cat_map_id 
   FROM mn_cat_map 
   WHERE product_num IN (select column_value from table(V_PRODUCT_NUM_ARR)) 
       and catalog_type = 'INT'; 
   

2. 添加bulk collect後fetch：

   LOOP 
       fetch c1 bulk collect into product_id_list limit 100; 
       EXIT WHEN c1%notfound; 
       product_id_list.extend; 
       product_id_list(product_id_list.count) := v_output; 
       dbms_output.put_line('Product ('||v_output ||'):'||product_id_list(v_output)); 
       END LOOP; 
   

如果您編寫limit 100，則每個循環將在product_id_list中放置100條記錄。您可以省略limit子句，在這種情況下，您將在一次獲取中獲取所有記錄。

編輯
如何看到的結果：

declare 
    myarray varchar_array; 
    my_num_array number_array; 
begin 
    myarray := varchar_array(); 
    myarray.extend(2); 
    myarray(1) := '151043'; 
    myarray(2) := '2895'; 
    my_num_array := GET_PRODUCT_ID_ARR(myarray); 
    for i in 1 .. my_num_array.count loop 
    dbms_output.put_line(my_num_array(i)); 
    end loop; 
end; 
/

Answer 2

什麼@William說是安靜真的。不建議使用VARRAY(1000000)。您可以創建一個類型table。但是，如果我遵循你所做的，你的代碼中就會出現一些錯誤。請看下面你如何做到這一點。

表準備：

create table mn_cat_map(cat_map_id number, 
         product_num varchar2(1000), 
         catalog_type varchar2(10)); 
/
INSERT INTO T541682.MN_CAT_MAP (CAT_MAP_ID, PRODUCT_NUM, CATALOG_TYPE) 
    VALUES (10, 'A123', 'INT'); 

INSERT INTO T541682.MN_CAT_MAP (CAT_MAP_ID, PRODUCT_NUM, CATALOG_TYPE) 
    VALUES (2, 'B121', '2Wheer'); 

INSERT INTO T541682.MN_CAT_MAP (CAT_MAP_ID, PRODUCT_NUM, CATALOG_TYPE) 
    VALUES (3, 'C645', '4Wheer'); 

COMMIT; 

create or replace TYPE VARCHAR_ARRAY AS VARRAY(1000000) OF VARCHAR2(1000); 
/
create or replace TYPE NUMBER_ARRAY AS VARRAY(1000000) OF NUMBER; 
/

碼：看explainatory評論直列

CREATE OR REPLACE FUNCTION GET_PRODUCT_ID_ARR (V_PRODUCT_NUM_ARR VARCHAR_ARRAY) 
    RETURN NUMBER_ARRAY 
IS 
    product_id_list number_array := number_array(); 

    CURSOR c1(tbl_list VARCHAR_ARRAY) 
    IS 
     SELECT cat_map_id 
     FROM mn_cat_map 
     WHERE product_num in (select column_value from table(tbl_list)) ---Checking if the item exists in the table with passed collection 
     AND catalog_type = 'INT'; 

    v_output  NUMBER:= 0; 
BEGIN 

    --not opening cursor and am not looking for processing any records. 
    --OPEN c1(V_PRODUCT_NUM_ARR); 

    --passing the input varray to the cursor. 
    for i in c1(V_PRODUCT_NUM_ARR) 
    loop 

    v_output:=v_output + 1; 

    product_id_list.extend; 

    product_id_list(product_id_list.COUNT):= i.cat_map_id; 

    DBMS_OUTPUT.put_line('Product (' || v_output || '):' ||product_id_list(product_id_list.COUNT)); 


    end loop; 

    RETURN product_id_list; 
END; 
/

執行：

SQL> select GET_PRODUCT_ID_ARR(VARCHAR_ARRAY('A123','B121','C645')) COl1 from dual; 

COL1 
-------------------------------------------------------------------------------- 
NUMBER_ARRAY(10) 

Product (1):10