Rekursiv SQL ger ORA-01790

Enligt min åsikt är "Rekursiv Subquery Factoring" bruten i 11g R2 för frågor med datum- eller tidsstämpelkolumn.

with test(X) as
(
  select to_date('2010-01-01','YYYY-MM-DD') from dual
  union all (
    select (X + 1) from test where X <= to_date('2010-01-10','YYYY-MM-DD') 
  )
)
select * from test;

ORA-01790

använd en cast för att konvertera datatypen:

with test(X) as
(
  select cast(to_date('2010-01-01','YYYY-MM-DD') as date) from dual
  union all (
    select (X + 1) from test where X <= to_date('2010-01-10','YYYY-MM-DD') 
  )
)
select * from test;

X
-------------------
2010-01-01 00:00:00

1 row selected

Att lägga en dejt till en dejt hjälper, men var är de andra resultaten?

Det blir ännu bättre...

Prova med ett annat startdatum:

with test(X) as
(
  select cast(to_date('2007-01-01','YYYY-MM-DD') as DATE) from dual
  union all (
    select (X + 1) from test where X <= to_date('2011-01-11','YYYY-MM-DD') 
  )
)
select * from test 
where rownum < 10; -- important!

X
-------------------
2007-01-01 00:00:00
2006-12-31 00:00:00
2006-12-30 00:00:00
2006-12-29 00:00:00
2006-12-28 00:00:00
2006-12-27 00:00:00
2006-12-26 00:00:00
2006-12-25 00:00:00
2006-12-24 00:00:00

9 rows selected

Räkna baklänges? Varför?

Uppdatering 14-jan-2014: Som en lösning kan du använda CTE som börjar med slutdatumet och bygger den rekursiva CTE bakåt, så här:

with test(X) as
(
  select cast(to_date('2011-01-20','YYYY-MM-DD') as DATE) as x from dual
  union all (
    select cast(X - 1 AS DATE) from test 
    where X > to_date('2011-01-01','YYYY-MM-DD') 
  )
)
select * from test 

Resultat:

|                              X |
|--------------------------------|
| January, 20 2011 00:00:00+0000 |
| January, 19 2011 00:00:00+0000 |
| January, 18 2011 00:00:00+0000 |
| January, 17 2011 00:00:00+0000 |
| January, 16 2011 00:00:00+0000 |
| January, 15 2011 00:00:00+0000 |
| January, 14 2011 00:00:00+0000 |
| January, 13 2011 00:00:00+0000 |
| January, 12 2011 00:00:00+0000 |
| January, 11 2011 00:00:00+0000 |
| January, 10 2011 00:00:00+0000 |
| January, 09 2011 00:00:00+0000 |
| January, 08 2011 00:00:00+0000 |
| January, 07 2011 00:00:00+0000 |
| January, 06 2011 00:00:00+0000 |
| January, 05 2011 00:00:00+0000 |
| January, 04 2011 00:00:00+0000 |
| January, 03 2011 00:00:00+0000 |
| January, 02 2011 00:00:00+0000 |
| January, 01 2011 00:00:00+0000 |

Test utfört med:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production