Problem with cursor query (Oracle 8i)

Hi all

The following query works perfectly well if I test it in my development environment

SELECT dt,
      (SELECT 'Y'
         FROM dual
        WHERE EXISTS (SELECT 'x'
                        FROM top_days t
                       WHERE t.date = dt))
FROM (SELECT to_date(p_date_start, 'dd-mm-yyyy') + LEVEL - 1 dt
                   FROM dual
                 CONNECT BY LEVEL <=
                            to_date(p_date_end, 'dd-mm-yyyy') - to_date(p_date_start, 'dd-mm-yyyy') + 1
                        AND PRIOR dbms_random.value IS NOT NULL) --workaround for oracle 8i
               ,
                top_days t
WHERE dt = t.date(+)
ORDER BY dt;

However, when I try to include it in my package (where it is used in a slider) I get a PLS-00103: encountered the symbol "SELECT" when expecting one of the following numbers: (- + mod null other < an ID > etc.)

CURSOR c_holidays IS 
           SELECT dt,
                (SELECT 'Y'
                   FROM dual
                  WHERE EXISTS (SELECT 'x'
                           FROM top_days t
                          WHERE t.date = dt))
           FROM (SELECT to_date(p_date_start, 'dd-mm-yyyy') + LEVEL - 1 dt
                   FROM dual
                 CONNECT BY LEVEL <=
                            to_date(p_date_end, 'dd-mm-yyyy') - to_date(p_date_start, 'dd-mm-yyyy') + 1
                        AND PRIOR dbms_random.value IS NOT NULL) --workaround for oracle 8i
               ,
                top_days t
          WHERE dt = t.date(+)
          ORDER BY dt;

Is there something special I don't know for Oracle 8i which prevents me from using this query in a slider? Or am I just missing something blatantly obvious?
Note: p_date_start and p_date_end are parameters that are filled in the service

FYI: Oracle 8i release version 8.1.7.4.1 and PL/SQL Release 8.1.7.4.0

Scalar subqueries in the select list have been introduced in SQL 8i but not in PL/SQL 8i. The only solution to use subqueries in the select list in PL/SQL 8i is dynamic SQL:

OPEN v_ref_cursor FOR '
SELECT dt,
      (SELECT 'Y'
         FROM dual
        WHERE EXISTS (SELECT 'x'
                        FROM top_days t
                       WHERE t.date = dt))
FROM (SELECT to_date(p_date_start, 'dd-mm-yyyy') + LEVEL - 1 dt
                   FROM dual
                 CONNECT BY LEVEL <=
                            to_date(p_date_end, 'dd-mm-yyyy') - to_date(p_date_start, 'dd-mm-yyyy') + 1
                        AND PRIOR dbms_random.value IS NOT NULL) --workaround for oracle 8i
               ,
                top_days t
WHERE dt = t.date(+)
ORDER BY dt';

SY.

Tags: Database

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