Maxim Demenko wrote:
> DA Morgan schrieb:
>> mikeg13_at_gmail.com wrote:
>>> I have dynamically created an INSERT statement that is populating a
>>> table with a CLOB field. The value being inserted into the CLOB field
>>> is generated by concatenating a bunch of strings. In some case, it
>>> exceeds the 4K limit for string concatenation. The concatenation will
>>> have the 4G limit of a CLOB, if one of the fields being concatenated is
>>> of a clob data type. How can I create a clob field to be used in the
>>> concatenation in the SELECT statement?
>>>
>>> For example,
>>>
>>> insert into table1 (field1, clobfield) SELECT field1, <4k
>>> string>||<4kstring> from table2;
>>>
>>> I would like to put a clob in the concatenation string to make this
>>> work. Something like ...
>>>
>>> insert into table1 (field1, clobfield) SELECT field1, <4k
>>> string>||<4kstring>||<clob literal> from table2;
>>
>> There is no 4K limit for string concatenation.
>>
>> A VARCHAR2 variable is 32K and there is nothing that stops you from
>> concatenating multiple 32K VARCHAR2s into a CLOB.
>
> Daniel, there is a limit 4000 for an string literal (iirc, it was 2000
> in earlier versions). Declaring a variable as CLOB and concatenating in
> it several chunks will make able to put 32k into varable (every PL SQL
> variable is limited to 32k) . If OP will go up to 4Gb, he should do as
> Sybrand said and use EMPTY_CLOB or alternatively use dbms_lob package.
>
> Best regards
>
> Maxim
Literal? Someone is actually going to key in more 4GB character by
character? Seems to me it must be a case of concatenating variables
but stranger things have happened.
--
Daniel A. Morgan
University of Washington
damorgan_at_x.washington.edu
(replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org
Received on Fri Aug 04 2006 - 11:01:09 CDT
