使用嵌套表變量/在PL/SQL塊

Question

1. 內部SQL類別我首先創建一個對象address_type

   CREATE TYPE address_type AS OBJECT 
   (line1       VARCHAR2(100) 
   , line2       VARCHAR2(100) 
   , line3       VARCHAR2(100) 
   , city       VARCHAR2(50) 
   , state       VARCHAR2(50) 
   , country      VARCHAR2(50) 
   , zip       VARCHAR2(10) 
   ); 
   /
   

2. 創建上述目的的一個嵌套表型。

   CREATE TYPE address_table AS TABLE OF ADDRESS_TYPE; 
   /
   

3. 我然後創建另一個對象，如下所示：

   CREATE TYPE telephone_number_type AS OBJECT 
   (country_code     VARCHAR2(4) 
   , area_code      VARCHAR2(10) 
   , phone_number     VARCHAR2(10) 
   , extension      VARCHAR2(10) 
   , number_type     VARCHAR2(10) 
   ); 
   /
   

4. 然後我創建一個嵌套表類型如下：

   CREATE TYPE telephone_number_table AS TABLE OF TELEPHONE_NUMBER_TYPE; 
   /
   

5. 現在，我創建了一個名爲person表。其中許多列在這個問題中沒有多大用處，除了telephone_numbers列是嵌套表telephone_number_table類型。

   CREATE TABLE person 
   (personid      INTEGER   PRIMARY KEY 
   , fname       VARCHAR2(50)  NOT NULL 
   , mname       VARCHAR2(50) 
   , lname       VARCHAR2(50)  NOT NULL 
   , email       VARCHAR2(255) UNIQUE 
   , password      VARCHAR2(255) NOT NULL 
   , birthdate      DATE 
   , billing_address    ADDRESS_TABLE 
   , delivery_address    ADDRESS_TABLE 
   , telephone_numbers    TELEPHONE_NUMBER_TABLE 
   , display_pic     BLOB 
   , ts_registration    TIMESTAMP 
   , ts_verification    TIMESTAMP 
   , ts_last_updated    TIMESTAMP 
   ) NESTED TABLE billing_address STORE AS nt_billing_address 
   , NESTED TABLE delivery_address STORE AS nt_delivery_address 
   , NESTED TABLE telephone_numbers STORE AS nt_telephone_numbers 
   , LOB(display_pic) STORE AS SECUREFILE (
       TABLESPACE users 
       ENABLE STORAGE IN ROW 
       CHUNK 4096 
       PCTVERSION 20 
       NOCACHE 
       NOLOGGING 
       COMPRESS HIGH 
   ) 
   ; 
   

6. 我然後創建一個序列爲這樣：

   CREATE SEQUENCE sq_personid; 
   

7. 要插入的值到person表我使用匿名塊如下：

   DECLARE 
       v_fname person.fname%TYPE := 'Yogeshwar'; 
       v_mname person.mname%TYPE := ''; 
       v_lname person.lname%TYPE := 'Rachcha'; 
       v_email person.email%TYPE := 'yogeshrachcha@gmail.com'; 
       v_password person.password%TYPE := 'mail_123'; 
       v_birthdate person.birthdate%TYPE := TO_DATE('28-03-1987', 'DD-MM-YYYY'); 
       v_telephone_numbers TELEPHONE_NUMBER_TABLE; 
       v_billing_address ADDRESS_TABLE; 
       v_delivery_address ADDRESS_TABLE; 
   BEGIN 
       v_telephone_numbers := TELEPHONE_NUMBER_TABLE 
             (TELEPHONE_NUMBER_TYPE('+91','22','123456','','Residence') 
                   , TELEPHONE_NUMBER_TYPE('+91','22','456798','123','Office') 
                   , TELEPHONE_NUMBER_TYPE('+91','','1234567890','','Mobile')); 
   
       v_billing_address := ADDRESS_TABLE (ADDRESS_TYPE ('Line 1', 'Line 2', 'Line 3', 'Mumbai', 'Maharashtra', 'India', '123456')); 
       v_delivery_address := ADDRESS_TABLE (ADDRESS_TYPE ('Line 1', 'Line 2', 'Line 3', 'Mumbai', 'Maharashtra', 'India', '123456')); 
       -- billing and delivery addresses are the same. These are not much importance in this question. 
   
       INSERT INTO person VALUES 
       (sq_personid.nextval 
       , v_fname 
       , v_mname 
       , v_lname 
       , v_email 
       , v_password 
       , v_birthdate 
       , v_billing_address 
       , v_delivery_address 
       , v_telephone_numbers 
       , NULL 
       , sysdate 
       , sysdate 
       , sysdate); 
   
   END; 
   

一切直到這一點絕對完美。然後，在象下面的匿名塊，我嘗試創建一個嵌套表變量，並用它在一個SQL查詢：

DECLARE 
    TYPE t_country_codes IS TABLE OF VARCHAR2(4); 
    country_codes T_COUNTRY_CODES := T_COUNTRY_CODES('+1', '+44', '+91'); 
    cc VARCHAR2(4); 
BEGIN 
    FOR i IN (SELECT t.country_code 
          FROM person p 
          CROSS JOIN TABLE(p.telephone_numbers) t 
         WHERE t.country_code IN (SELECT COLUMN_VALUE -- I doubt the problem is with this SELECT statement. 
                FROM TABLE(country_codes))) LOOP 
     dbms_output.put_line(i.country_code); 
    END LOOP; 
END; 
/

我得到這個錯誤：

ORA-06550: line 8, column 70: 
PLS-00642: local collection types not allowed in SQL statements 
ORA-06550: line 8, column 64: 
PL/SQL: ORA-22905: cannot access rows from a non-nested table item 

Answer 1

嵌套表類型可以聲明爲在SQL（通過CREATE TYPE聲明就像你與telephone_number_table類型所做的那樣）或PL/SQL（通過TYPE聲明DECLARE塊）。如果您在PL/SQL中聲明類型，則不能在SQL中使用該類型的實例。您需要在SQL中聲明該類型才能在SQL中使用該類型的實例。

Answer 2

請嘗試移動你的「本地」（從最後一個塊）集合定義到模式級別。

此外，this後可以是有幫助的。