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POOracle: getting references in PLSQL
 

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  1. POOracle: getting references in PLSQL
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    <p>I need to get the reference of :new.OBJECT_VALUE but I don't now how.</p> <p>I tried doing this.</p> <p>Declaration of types:</p> <pre><code>CREATE TYPE Virus_ObjType AS OBJECT ( name VARCHAR2(50), description VARCHAR2(700) ); / CREATE TYPE Paper_ObjType AS OBJECT ( id NUMBER, title VARCHAR(100), magazine VARCHAR2(100), vol NUMBER, num NUMBER, year NUMBER(4) ); / CREATE TYPE Virus_NestTabType AS TABLE OF REF Virus_ObjType; / CREATE TYPE Paper_NestTabType AS TABLE OF REF Paper_ObjType; / ALTER TYPE Virus_ObjType ADD ATTRIBUTE papers Paper_NestTabType CASCADE; / ALTER TYPE Paper_ObjType ADD ATTRIBUTE virus Virus_NestTabType CASCADE; / </code></pre> <p>Declatation of tables:</p> <pre><code>CREATE TABLE Virus_ObjTable OF Virus_ObjType ( PRIMARY KEY(name)) NESTED TABLE papers STORE AS papersVirus_NestTable; CREATE TABLE Paper_ObjTable OF Paper_ObjType ( PRIMARY KEY (id)) NESTED TABLE virus STORE AS virus_NestTable; CREATE GLOBAL TEMPORARY TABLE virus_aux ( type varchar2(1), virus REF Virus_ObjType, paper REF Paper_ObjType) ON COMMIT DELETE ROWS; / </code></pre> <p>Declaration of trigger:</p> <pre><code>create or replace trigger Virus_Trigger_Before BEFORE INSERT ON Virus_ObjTable FOR EACH ROW DECLARE paper REF Paper_ObjType; virus REF Virus_ObjType; BEGIN IF inserting THEN IF :new.papers IS NOT NULL THEN FOR i IN 1..:new.papers.COUNT LOOP -- getting the pointer of the papers SELECT refe INTO paper FROM (SELECT REF(a) as refe FROM Paper_ObjTable a) WHERE refe=:new.papers(i); SELECT REF(:NEW.OBJECT_ID) INTO virus FROM dual; INSERT INTO virus_aux VALUES ('i', virus, paper); END LOOP; END IF; END IF; END; </code></pre> <p>If someone wants to try with data:</p> <pre><code>INSERT INTO paper_objtable (id, title, magazine, vol, num, year) VALUES (1, 'Que mala es la Gripe', 'Fuzzy Sets', 1, 1, 1993); INSERT INTO paper_objtable (id, title, magazine, vol, num, year) VALUES (3, 'La Gripe ataca de nuevo', 'Information Sciences', 1, 1, 1996); INSERT INTO virus_objtable (SELECT 'Gripe', 'Virus de la Gripe', CAST(COLLECT(REF(a)) AS Paper_NestTabType) FROM paper_objtable a); </code></pre> <p>but I get the next error:</p> <pre><code>ORA-01747: invalid user.table.column, table.column, or columns specification </code></pre> <p>Can anyone help me?</p>
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    1. USAlex Moreno
    1. USAlex Moreno
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    1. COIs inside of a trigger and I'm triying to get the reference of the objet to insert it in a nested table.
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      1. USAlex Moreno
    2. CO@Ben He wants to get the logical pointer to the row object. See http://docs.oracle.com/cd/B28359_01/appdev.111/b28371/adobjint.htm#i458258
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    3. COExactly, thank you @Toru.
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