More efficient ways to deal with query than using IN clause???

Question

There is a module in an application that I wrote that under certain circumstances executes a query that looks something like the following:
SELECT field1, field2
from table
where id in (1,2............1000)
OR id in (1001,1002.............2000)
OR id in (59000, 59001.................60000);
To clarify... Yes.. I am saying that because of oracle's limitation on 1000 expressions in an IN clause, there would be up to 60 different IN clauses.
When I initially wrote this module... I wasn't aware of the volume of data that I was dealing with. I fully expect that when running this module with real data, it is going to be painfully slow. I am also worried about out of memory errors. Does anyone have suggestions? Thanks!
Btw... This is using ORACLE 10g

Answer 1

Depending on the number of rows in the table, I would tend to look at loading the ID's into a temporary table and then using that temporary table in your search, i.e.
SELECT field1, field2
  FROM table
WHERE id IN (SELECT id FROM new_temp_table)or
SELECT field1, field2
  FROM table a
WHERE EXISTS (
    SELECT 1
      FROM new_temp_table b
     WHERE a.id = b.id )Of course, if the logic for figuring out the 60,000 ID's you want to search on can be expressed as a SQL query, you could replace the temp table in the above examples with that particular SQL expression.
Justin