Physical Tables based on select with parameters

Question

I have a database query that receives some input parameters and it worked fine when I run this query from any sql tool, The query is very complex and the input parameters are not associated in the sql to a specific column, they are associated in the subqueries that the query has.
Is it possible create a view using the sys_context function and establish the parameters at runtime from business intelligence 10.1.3.4.1 ?
Thanks!
Ramiro Ortiz

Answer 1

I believe this is what you are trying to get at:
SELECT DECODE(m.pref_type, 1, (SELECT result FROM a
                               WHERE a.pref_value = m.pref_value),
                           2, (SELECT result FROM b
                               WHERE b.pref_value = m.pref_value)
FROM my_table mAlthough, if the tables are large, that might be pretty slow. Better than an outer join, but one of those correlated queries is going to be run for each row in my_table. You could lso try something like:
SELECT m.pref_type, r.result
FROM my_table m,
     (SELECT 'A' tbl, pref_value, result
      FROM a
      UNION ALL
      SELECT 'B', pref_value, result
      FROM b) r
WHERE DECODE(m.pref_type, 1, 'A', 'B') = r.tbl and
      m.pref_value = r.pref_valueHTH
John