Folks,
Is there a straightforward way to dynamically create a LOBFILE
specification via an Oracle expression?
For example, assume the following table (note there is /not/ a field for
the file name itself):
create table clob_data (
id number
, data clob
);
And the following import file, clob_data.dat:
1,1.pdf
2,2.pdf
and so forth.
A typical control file might read:
LOAD DATA
INFILE clob_data.dat
TRUNCATE
INTO TABLE clob_data
...
(
id
, file_name filler
, data lobfile( file_name ) terminated by eof
)
Let's assume, though, that we cannot execute the script from the blob file
directory, and, also, that the filenames in the import file cannot be
changed.
Thus, what we need is to dynamically form the full path to the file, and
then use that as the input to the lobfile call in the control file.
Assuming a path, '/data/clobs' we'd want something like
(
id
, file_name filler
, data lobfile( [[psuedo] '/data/clobs/' || file_name )
)
Unfortunately, sqlldr seems to support only imported filter columns (no
constants or expressions), and lobfile only constants, not expressions. So
there's no seeming way to do something like,
(
id
, file_name
, data lobfile( expression "'/data/clobs/' || :file_name" )
)
which of course doesn't work.
Any workarounds for this, involving /only/ modification of the control
file, and not rewriting of the import datafile?
Thanks,
Adam
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