我首先创建一个
address_type对象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) ); /我创建了上述对象的嵌套表类型。
CREATE TYPE address_table AS TABLE OF ADDRESS_TYPE; /然后我创建另一个对象，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) ); /然后我创建一个嵌套表类型，如下所示：
CREATE TYPE telephone_number_table AS TABLE OF TELEPHONE_NUMBER_TYPE; /现在我创建一个名为
person.telephone_numbers除了嵌套表telephone_number_table类型的列之外，其中许多列在这个问题中没有多大用处。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 ) ;然后我为此创建一个序列：
CREATE SEQUENCE sq_personid;要将值插入
person表中，我使用匿名块，如下所示：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;
到目前为止，一切都运行得非常完美。然后在像下面这样的匿名块中，我尝试创建一个嵌套表变量并在 SQL 查询中使用它：
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;
/
我收到此错误：
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