On 02/07/2011 10:38 PM, Radosław Smogura wrote:
> PostgreSQL doesn't have field type CLOB, nor BLOB.
I know that.
> If eveny it would be possible for driver to read CLOB from varchar, driver
> will be unable to set proper value when calling UPDATE or INSTERT. It is due
> to internal way how PSQL deals with those values.
Isn't the whole concept of CLOB just a bi-product of old proprietary
database-design where some RDBMS'es are unable to store arbitrary long
varchars? What properties do CLOBs have that varchars don't, except
being large? I don't understand why CLOBs can't be treated like text in
the PG-driver as PG handles large Strings just fine in
varchar/text-columns. If a DBA has for some reason defined a scale, say
VARCHAR(10), on a column and tries to store a CLOB in it, well - his
problem; He should get an Exception from PG.
> I know drivers supports custom casting, but casting from varchar to clob is
> implicite prohibted in JDBC. If you look at B-6 table x indicates possible
> casting. There is no x, nor X on varchar cross clob
Does it not make sense to you to be able to cast a *character large
object* to a *variable length character*-type and visa versa?
If the only argument is spec-complience I'm not getting it...
--
Andreas Joseph Krogh <andreak@officenet.no>
Senior Software Developer / CTO
Public key: http://home.officenet.no/~andreak/public_key.asc
------------------------+---------------------------------------------+
OfficeNet AS | The most difficult thing in the world is to |
Rosenholmveien 25 | know how to do a thing and to watch |
1414 Trollåsen | somebody else doing it wrong, without |
NORWAY | comment. |
Org.nr: NO 981 479 076 | |
| |
Tlf: +47 24 15 38 90 | |
Fax: +47 24 15 38 91 | |
Mobile: +47 909 56 963 | |
------------------------+---------------------------------------------+