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SELECT data from TABLE TYPE

Posted on 2014-07-20
3
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Last Modified: 2014-07-21
HI, i have,

CREATE OR REPLACE TYPE t1_type
    FORCE AS OBJECT
(
    code NUMBER(15),
    description VARCHAR2(15)
);

create or replace TYPE T1_TYPE_TABLE FORCE
AS
  TABLE OF T1_TYPE;

CREATE OR REPLACE TYPE t2_type
    FORCE AS OBJECT
(
    id NUMBER(15),
    name VARCHAR2(15),
    address VARCHAR2(15),
    T1_TAB  T1_TYPE_TABLE
    );


create or replace TYPE T2_TYPE_TABLE FORCE
AS
  TABLE OF T2_TYPE;


How to we use SELECT in multi-type table objects:
I want to query data from T1_TYPE_TABLE  where CODE = 2
And I also want to query the data from T2_TYPE_TABLE  where ID = 4;



THANKS AND REGARDS,
0
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Question by:Sudees
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3 Comments
 

Author Comment

by:Sudees
ID: 40207980
I am asking about using SELECT query not using FOR LOOP
0
 
LVL 77

Accepted Solution

by:
slightwv (䄆 Netminder) earned 500 total points
ID: 40207989
You 'can' by casting the PL/SQL table as a regular table but I would not suggest using this method.  You are taking an in-memory table switching context from pl/sql into regular SQL, creating a cursor to select from then switching back to PL/SQL.

Not very efficient in my opinion.

That said, here's the code based from the code in the previous question.

CREATE OR REPLACE TYPE r_type
    FORCE AS OBJECT
(
    code NUMBER(15),
    description VARCHAR2(15)
);
/


CREATE OR REPLACE TYPE tr_type IS TABLE OF r_type;
/


CREATE OR REPLACE PROCEDURE t1
AS

    tr_type_i tr_type := tr_type();
    i         INTEGER;
    junk      NUMBER;
BEGIN
    tr_type_i.EXTEND(3);
    tr_type_i(1) := r_type(NULL, NULL);
    tr_type_i(1).code := 1;
    tr_type_i(1).description := 't1';

    tr_type_i(2) := r_type(NULL, NULL);
    tr_type_i(2).code := 2;
    tr_type_i(2).description := 't1';

    tr_type_i(3) := r_type(NULL, NULL);
    tr_type_i(3).code := 4;
    tr_type_i(3).description := 't1';




	SELECT count(*) into junk
	FROM
	TABLE(CAST(tr_type_i AS tr_type))
	WHERE code=4;

	if junk>0 then
        	DBMS_OUTPUT.put_line('Found an object in the collection with code=4');
	else
        	DBMS_OUTPUT.put_line('No code=4 found');
	end if;
END;
/
                                          
show errors

exec t1;

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