Problem with to_date('date_char') in a where clause

Question

A little confused with this plsql error.
This code works...
select to_date(value,'dd/mm/yy') from kip_lov where domain='MODULE START1'
If I try to put the "to_date(value,'dd/mm/yy')" expression in the where clause I get an invalid year error,
select to_date(value,'dd/mm/yy') from kip_lov where domain='MODULE START1'
AND to_date(value,'dd/mm/yy') = SYSDATE
"Error report:
SQL Error: ORA-01841: (full) year must be between -4713 and +9999, and not be 0"
The variable "value" is a varchar2 in the format dd/mm/yy.
Note: the following code also works fine,
select to_date(value,'dd/mm/yy') - sysdate from kip_lov where domain='MODULE START1'
I have modified my lov table so that it uses the date type now and it works fine. Just curious as to why the above example does not work.
Sam.

Answer 1

check your table description and values first, is there any dd/mm/yy or mm/dd/yy confliction
A scenario which runs.
SQL> desc trya
Name Null? Type
UPDATED_ON DATE
UPD VARCHAR2(8)
SQL> select * from trya
2 ;
UPDATED_O UPD
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
31-JUL-06 31/07/06
UPDATED_O UPD
31-JUL-06 31/07/06
31-JUL-06 31/07/06
13 rows selected.
SQL> SELECT * FROM trya WHERE TO_CHAR(TO_DATE(upd,'dd/mm/yy'))=SYSDATE;
no rows selected
SQL> SELECT * FROM trya WHERE TO_DATE(upd,'dd/mm/yy')=SYSDATE;
no rows selected
SQL>
NO error on both syntax
rgds,
Rup