Invalid SQL statement error with refcursor - oracle

Question

I am trying to get the results of the underlying statements. The SQL statements works without any problems. However, in order to print the results I would like to use refcursor. I get the following errors:
ORA-00900: invalid SQL statement
ORA-01008: not all variables bound
ORA-00900: invalid SQL statement
VARIABLE reader refcursor;
DECLARE
line varchar2(32767);
BEGIN
line := 'SELECT role_id,';
FOR n IN (SELECT name
FROM (SELECT competence.skill_role.role_id,
competence.skill_label.name,
competence.skill_role.target_value
FROM competence.skill_role,
competence.skill_label
WHERE competence.skill_label.skill_id =
competence.skill_role.skill_id
AND competence.skill_label.language_id = 1)
matrix_result ) LOOP
line := line || '(decode(name,''' || n.name ||
''',target_value)) "' || n.name || '",';
END LOOP;
line := RTRIM(line, ',') ||
' FROM (SELECT competence.skill_role.role_id,
competence.skill_label.name,
competence.skill_role.target_value
FROM competence.skill_role, competence.skill_label
WHERE competence.skill_label.skill_id =
competence.skill_role.skill_id
AND competence.skill_label.language_id = 1) matrix_result';
--dbms_output.put_line(line);
--execute immediate line;
OPEN :reader FOR line;
END;
/
PRINT :reader;
Table data
CREATE TABLE competence.skill_role
(skill_id NUMBER,
role_id NUMBER,
target_value NUMBER)
/
INSERT ALL
INTO competence.skill_role VALUES (3432030, 1421866, 2)
INTO competence.skill_role VALUES (3434962, 1421866, 2)
INTO competence.skill_role VALUES (3488025, 3488804, 4)
SELECT * FROM competence.skill_role
SKILL_ID ROLE_ID target_value
---------- ------- -----------
3432030 1421866 2
3434962 1421866 2
3488025 3488804 4
CREATE TABLE competence.skill_label
(skill_id NUMBER,
name vchar2 (30))
/
INSERT ALL
INTO competence.skill_label VALUES (3432030, 'Alueen projektipätevyys')
INTO competence.skill_label VALUES (3434962, 'Moottorin koekäyttö')
INTO competence.skill_label VALUES (3488025, 'Etähallintajärjestelmät')
SELECT * FROM arc_competence.skill_label
SKILL_ID NAME
---------- -------
3432030, Alueen projektipätevyys
3434962, Moottorin koekäyttö
3488025, Etähallintajärjestelmät
I would like to have the following result from the first query. From your answer (if I understood correctly), it seems that I need to run the resultant query manually to get the answer. I'd like to have the result without running the resultant query :-) I don't have the access to the client machine at the moment but I am going there now.
ROLE_ID Alueen projektipätevyys Moottorin koekäyttö Etähallintajärjestelmät
1421866 2 2
3488804 4

Answer 1

If I correct your code so that it compiles
Your INSERT ALL statements are missing a SELECT
The name column in skill_label is defined as a vchar2(30) rather than a varchar2(30)
Your anonymous block references a column language_id that your DDL does not include
the code runs without error. If the only problem is that you want to combine the first two rows into a single row, you just need to add a MAX to all the columns other than ROLE_ID and to add a GROUP BY role_id to your query.
SQL> ed
Wrote file afiedt.buf
1 CREATE TABLE skill_role
2 (skill_id NUMBER,
3 role_id NUMBER,
4* target_value NUMBER)
SQL> /
Table created.
SQL> ed
Wrote file afiedt.buf
1 INSERT ALL
2 INTO skill_role VALUES (3432030, 1421866, 2)
3 INTO skill_role VALUES (3434962, 1421866, 2)
4 INTO skill_role VALUES (3488025, 3488804, 4)
5* select * from dual
SQL> /
3 rows created.
SQL> ed
Wrote file afiedt.buf
1 CREATE TABLE skill_label
2 (skill_id NUMBER,
3* name varchar2 (30))
SQL> /
Table created.
SQL> ed
Wrote file afiedt.buf
1 INSERT ALL
2 INTO skill_label VALUES (3432030, 'Alueen projektipΣtevyys')
3 INTO skill_label VALUES (3434962, 'Moottorin koekΣytt÷')
4 INTO skill_label VALUES (3488025, 'EtΣhallintajΣrjestelmΣt')
5* select * from dual
SQL> /
3 rows created.
SQL> commit;
Commit complete.
SQL> variable reader refcursor;
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2 line varchar2(32767);
3 BEGIN
4 line := 'SELECT role_id,';
5 FOR n IN (SELECT name
6 FROM (SELECT skill_role.role_id,
7 skill_label.name,
8 skill_role.target_value
9 FROM skill_role,
10 skill_label
11 WHERE skill_label.skill_id =
12 skill_role.skill_id
13 )
14 matrix_result ) LOOP
15 line := line || 'max(decode(name,''' || n.name ||
16 ''',target_value)) "' || n.name || '",';
17 END LOOP;
18 line := RTRIM(line, ',') ||
19 ' FROM (SELECT skill_role.role_id,
20 skill_label.name,
21 skill_role.target_value
22 FROM skill_role, skill_label
23 WHERE skill_label.skill_id =
24 skill_role.skill_id
25 ) matrix_result ' ||
26 ' GROUP BY role_id' ;
27 dbms_output.put_line(line);
28 --execute immediate line;
29 OPEN :reader FOR line;
30* END;
31 /
PL/SQL procedure successfully completed.
SQL> print reader
ROLE_ID Alueen projektipΣtevyys Moottorin koekΣytt÷ EtΣhallintajΣrjestelmΣt
---------- ----------------------- ------------------- -----------------------
1421866 2 2
3488804 4