Oracle LIMIT and 1000 column restriction

Question

I have a SQL query that looks like this:

SELECT foo \"c0\",
       bar \"c1\",
       baz \"c2\",
       ...
FROM   some_table
WHERE  ...

I

Answer 1

Is the problem pagination or just returning the first 10 rows? If it is the latter, you can do:

SELECT foo "c0",
       bar "c1",
       baz "c2",
       ...
FROM   some_table
WHERE  ... and
       rownum <= 10

Answer 2

you cant have a view with 1000+ columns, so cheat a little.

select *
  from foo f, foo2 f2
 where (f.rowid, f2.rowid) in (select r, r2
                                 from (select r, r2, rownum rn
                                         from (select /*+ first_rows */ f.rowid r, f2.rowid r2
                                                 from foo f, foo2 f2
                                                where f.c1 = f2.a1 
                                                  and f.c2 = '1'
                                                order by f.c1))
                                where rn >= AAA
                                  and rownum <= BBB)


order by whatever;

now put any where clauses in the innermost bit (eg i put f.c1 = '1').

BBB = pagesize. AAA = start point

Answer 3

Okay, this will perform worse than what you were planning, but my point is that you could try pagination this way:

WITH CTE AS
(
    ... original SQL goes here ...
)

SELECT A.*
FROM CTE A
INNER JOIN (SELECT  YourKey,
                    ROW_NUMBER() OVER (ORDER BY ...) rnum
            FROM CTE) B
ON A.YourKey = B.YourKey
WHERE rnum BETWEEN 1 AND 10;