Query with parameter as Array (UDT) very slow

Question

Hi.
I have following Problem. I try to use Oracle Instant Client 11 and ODP.NET to pass Arrays in SELECT statements as Bind Parameters. I did it, but it runs very-very slow. Example:
- Inittial Query:
SELECT tbl1.field1, tbl1.field2, tbl2.field1, tbl2.field2 ... FROM tbl1
LEFT JOIN tbl2 ON tbl1.field11=tbl2.field0
LEFT JOIN tbl3 ON tbl2.field11=tbl3.field0 AND tbll1.field5=tbl3.field1
...and another LEFT JOINS
WHERE
tbl1.field0 IN ('id01', 'id02', 'id03'...)
this query with 100 elements in "IN" on my database takes 3 seconds.
- Query with Array bind:
in Oracle I did UDT: create or replace type myschema.mytype as table of varchar2(1000)
than, as described in Oracle Example I did few classes (Factory and implementing IOracleCustomType) and use it in Query,
instead of IN ('id01', 'id02', 'id03'...) I have tbl1.field0 IN (select column_value from table(:prmTable)), and :prmTable is bound array.
this query takes 190 seconds!!! Why? I works, but the HDD of Oracle server works very hard, and it takes too long.
Oracle server we habe 10g.
PS: I tried to use only 5 elements in array - the same result, it takes also 190 seconds...
Please help!

Answer 1

I did (some time ago and it was a packaged procedure) something like
Procedure p(p_one in datatype,p_two in datatype,p_dataset out sys_refcursor) is
  the_sql varchar2(32000);
  the_cursor sys_refcursor;
begin
  the_sql = 'WITH NOTIFICACAO AS( ' ||
            '      SELECT ' ||
            '       t1.cd_consultora, ' ||
            '                               where       t1.dt_notificacao_cn >= to_date(''01/09/2006'',''dd/mm/yyyy'') ' ||  -- note the ''
            '           where rownum <= :W_TO_REC) ' ||   -- parameter 1
            '         where r_linha >= :W_FROM_REC ';     -- parameter 2
  open the_cursor for the_sql using p_one,p_two;  -- just by the book
end p;if I remember correctly
Regards
Etbin