Dbms_crypto and blob datatypes

Hi everyone
I've been trying to learn how to encrypt data (a file uploaded) using blob datatype. This is me first attempt at encrypting and have been doing some research on this. I need to use the BLOB as I am encrypting a file that is uploaded to the system. Does anyone have experience in this or know of a good example that I can take a look at?
Ray

Hello,
check SAP HANA SQL Reference Guide for list of data types:
(page 14 - Classification of Data Types)
https://service.sap.com/~sapidb/011000358700000604922011
For this purpose might be useful following data types:
Large Object (LOB) Types
LOB (large objects) data types, CLOB, NCLOB and BLOB, are used to store a large amount of data such as text documents and images. The maximum size of an LOB is 2 GB.
BLOB
The BLOB data type is used to store large binary data.
CLOB
The CLOB data type is used to store large ASCII character data.
NCLOB
The NCLOB data type is used to store a large Unicode character object.
Tomas

Similar Messages

How we handle CLOB and BLOB Datatypes in HANA DB

Dear HANA Gurus,
We have would like to build EDW using HANA base on our source system Oracle and it's supports CLOB and BLOB datatypes
Would you please suggest how do we handle in HANA DB.
Let not say it's oracle specific.
Regards,
Manoj

Hello,
check SAP HANA SQL Reference Guide for list of data types:
(page 14 - Classification of Data Types)
https://service.sap.com/~sapidb/011000358700000604922011
For this purpose might be useful following data types:
Large Object (LOB) Types
LOB (large objects) data types, CLOB, NCLOB and BLOB, are used to store a large amount of data such as text documents and images. The maximum size of an LOB is 2 GB.
BLOB
The BLOB data type is used to store large binary data.
CLOB
The CLOB data type is used to store large ASCII character data.
NCLOB
The NCLOB data type is used to store a large Unicode character object.
Tomas

Export and Import Of Tables having BLOB and Raw datatype

Hi Gurus,
I had to export one schema in one database and import to another schema in another database.
However my current database contains raw and blob datatype.I have exported the whole database by the following commnad
exp SYSTEM/manager FULL=y FILE=jbrms_full_19APR2013.dmp log=jbrms_full_19APR2013.log GRANTS=y ROWS=y
My question is if all the tables with raw and blob have been exported properly or not.I have done one more thing after taking the export , I have imported to local db and checked the no of rows in the both the envs are same.As I have not tested with the application to confirm.
I am using this version of Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
not able to attach the complete log file but for the schema jbrms which has the blob and raw datatype.
Please let me know if you find some potential concerns with the export for BLOB and raw
. about to export JBRMS's tables via Conventional Path ...
. . exporting table FS_FSENTRY 8 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table FS_WS_DEFAULT_FSENTRY 2 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table PM_WS_DEFAULT_BINVAL 60 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table PM_WS_DEFAULT_BUNDLE 751 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table PM_WS_DEFAULT_NAMES 2 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table PM_WS_DEFAULT_REFS 4 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table VERSIONING_FS_FSENTRY 1 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table VERSIONING_PM_BINVAL 300 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table VERSIONING_PM_BUNDLE 11654 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table VERSIONING_PM_NAMES 2 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table VERSIONING_PM_REFS 1370 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.

You could see the 'QUESTIONABLE STATISTICS' warning for a couple of reasons. I don't remember them all but.
1. If the target and source character set is different.
2. system generated names (I think?)
the best solution if you don't need the exact statistics that are on your source database would be to add
statistics=none
to your imp command and then regather statistics when the imp command is done.
Dean

Problem with special chars in BLOB datatype using contains keyword

Facing problem, when part searching with special chars in BLOB datatype. It is considering the non alpha-numeric chars as a separtor in a provided string
EX:
SELECT *
FROM RESUME_TEST P,grst_candidate d
WHERE d.candidate_id = p.candidate_id
AND CONTAINS(P.CAND_RESUME,'%VB.NET%',1) > 0
Strings: , VB.NET , PL/SQL AS/400 , C etc..
Followed the below approaches
1) created a table:
Syntax: create table resume_Test(cand_id number(10),cand_resume blob);
2) inserted the values into this table upto 60,000
3) created a context index
3.1 created preferences
Syntax:
BEGIN
ctx_ddl.create_preference('try_lexer3','BASIC_LEXER');
ctx_ddl.set_attribute('try_lexer3','printjoins','-_~!@#$%^&*(){}[],=?\;|><.+');
END;
3.2 created context index
Syntax:
CREATE INDEX CANDRESUME_CTX_IDX ON resume_test (cand_resume)
INDEXTYPE IS CTXSYS.CONTEXT
PARAMETERS ('LEXER try_lexer3 memory 500M');
4) while executing this index, it is taking much time approx 6 hrs(plz explain why it is taking time)
5) Problems:
5.1 when searching with string(VB.NET , PL/SQL AS/400 , C etc..) it is considering the special char as a separator
5.2 used escape char (\) also, but no effect
5.3 when searching with single char, it is giving error (ORA-29902,ORA-20000,DRG-51030)
5.4 getting the above error with wild card chars (& ,_, (),{},[])
So, please explain the clear scenarios, why am getting this error , and how to get the proper results.

Have you tried adding the / char to the printjoin characters?
Indexing can take a lot of time, depending on the amount of data and your machine's power. You could try to parallelize the index creation and / or assign more memory
CREATE INDEX CANDRESUME_CTX_IDX ON resume_test (cand_resume)
INDEXTYPE IS CTXSYS.CONTEXT
PARAMETERS ('LEXER try_lexer3 memory 2000M') PARALLEL 8;

How can i make a pl/sql function for BLOB datatype

hi..anyone here who is very familiar about BLOB datatype. i have a COLUMN_ID, COLUMN_A in a certain TABLE_1. COLUMN_A is blob datatype that contains almost 250,000rows
SQL>select column_A from table_1 where column_id=1234567
column_A
00000001000000010000000606D4E833074B69EC06D4E91F074CO18406D50C58074C031E
how can i make a user-defined function to compute and convert this blob datatype into decimal length value. this hex value are points in the map.. the function must contain
1.get the length of a blob then
2.convert blob to variable hexadecimal characters by parsing it into 8
3.to_number function or other function used to convert haxadecimal characters to decimal numbers
4.phythagorean formula to compute length between two points. this is the formula i think LENGTH =
SQRT(power((coordinate_x-prev_coordinate_x),2)+power((coordinate_y-prev_y),2));
after this when i type this
SQL>select user_function(column_A) from table_1 where column_id=1234567
user_functions(column_A)
--output length will be in decimal value already
the function will goes like this
step1 is to get the blob length
00000001000000010000000606D4E833074B69EC06D4E91F074CO18406D50C58074C031E
step2 is parsing of data by eights
00000001 =>1
00000001 =>1
00000006 =>6 (number of coordinates)
06D4E833 => X1
074B69EC => Y1
06D4E91F => X2
074CO184 => Y2
06D50C58 => X3
074C031E => Y3
step3 to_number function used to convert hex char to decimal
step4 compute by phytagorean (NOTE ! when computing length the third parsed eight will tell how many coordinates are there..the number of coordinates is ranging from 2 up to E..above example shows 6 coordinates so it means
LENGTH1 =
SQRT(power((X2-X1),2)+power((Y2-Y1),2));
LENGTH2=
SQRT(power((X3-X2),2)+power((Y3-Y2),2));
TOTAL LENGTH=LENGTH1 + LENGTH2
thanks

its my first time to use that.There's got to be a first tiem for anything. Be brave.
btw if theres more easy suggestion pls feel free..Well of course the easiest solution would be if the calling program passed in the parameters as separate arguments instead of glomming them together in a string that has to be parsed. This sort of kluj really ought not to have survived into C21.
Cheers, APC

Insert record in table having BLOB datatype

Hi All,
I have a table with BLOB datatype, Pls assist me how to insert a record in this table?
CREATE TABLE document_BLOB_tab (
doc_id_no NUMBER
, doc_name VARCHAR2(200)
, doc_value BLOB);
What are the process to execute DBMS_LOB.fileOpen ?
Rgds
Sarfaraz

1- Create a table that has a list of all directory, filenames combination
SQL> create table listpic (directory varchar2(10), filename varchar2(10));
Table created.
2- Insert into that table all your directories and the filenames of the images within each
directory (directory, filename) combination
on my file system, I have
d:\tars\samples1\lilies.jpg
d:\tars\samples1\Sunset.jpg
d:\tars\samples2\Blue.jpg
d:\tars\samples1\Winter.jpg
Here is my insert statment
SQL> insert into listpic values('Samples1', 'lilies.jpg');
1 row created.
SQL> insert into listpic values('Samples1', 'Sunset.jpg');
1 row created.
SQL> insert into listpic values('Samples2', 'Blue.jpg');
1 row created.
SQL> insert into listpic values('Samples2', 'Winter.jpg');
1 row created.
SQL> commit;
Commit complete.
SQL> select * from listpic;
DIRECTORY FILENAME
Samples1 lilies.jpg
Samples1 Sunset.jpg
Samples2 Blue.jpg
Samples2 Winter.jpg
3- Create the table where you are going to store your pictures
SQL> create table pictures (id number(5), image blob);
Table created.
4- Create a directory pointing to the common parent Directory
SQL> create or replace directory IMAGES as 'd:\tars';
Directory created.
5- Create the following procedure to insert the image
SQL> set serveroutput on
SQL> create or replace procedure insert_image as
2 f_lob bfile;
3 b_lob blob;
4 i number := 1;
5 cursor image_cur is select directory, filename from listpic;
6 pic_rec image_cur%ROWTYPE;
7 begin
8
9 OPEN image_cur;
10 Loop
11 fetch image_cur into pic_rec;
12 EXIT WHEN image_cur%NOTFOUND;
13 insert into pictures values ( i, empty_blob() )
14 return image into b_lob;
15
16 f_lob := bfilename( 'IMAGES','\'||pic_rec.DIRECTORY||'\'||pic_rec.FILENAME);
17 dbms_lob.fileopen(f_lob, dbms_lob.file_readonly);
18 dbms_lob.loadfromfile( b_lob, f_lob, dbms_lob.getlength(f_lob) );
19 dbms_lob.fileclose(f_lob);
20 dbms_output.put_line (pic_rec.directory ||'\'||pic_rec.filename);
21 commit;
22 i := i+1;
23 END LOOP;
24 end;
25 /
Procedure created.
6- execute the procedure
SQL> exec insert_image;
Samples1\lilies.jpg
Samples1\Sunset.jpg
Samples2\Blue.jpg
Samples2\Winter.jpg
PL/SQL procedure successfully completed.
SQL> select count(*) from pictures;
COUNT(*)
4
SQL> select length(image) from pictures;
LENGTH(IMAGE)
83794
71189
28521
105542
Image has been uploaded to the dataabase.

Can LogMiner capture DMLs against rows with Blob datatype?

Hi,
Can LogMiner catch DMLs against rows with Blob datatype?
if a Blob column is 4G big each row, and you delete millions of
rows, but your redo log files is only 600M totally, I don't know (not sure) how those before-images of data can be stored in redo logfiles (also, you may need a very large log_archive_dest to hold those before-images )
please help to explain.
Thanks
Roy

Hi,
Can LogMiner catch DMLs against rows with Blob datatype?
if a Blob column is 4G big each row, and you delete millions of
rows, but your redo log files is only 600M totally, I don't know (not sure) how those before-images of data can be stored in redo logfiles (also, you may need a very large log_archive_dest to hold those before-images )
please help to explain.
Thanks
Roy

Problem while importing table with blob datatype

hi i am having a database 9i on windows xp and dev database 9i on AIX 5.2
while i am taking export of normal tables and trying to import i am successful.but when i am trying to import a table with blob datatype it is throwing "tablespace <tablespace_name> doesn't exist" error
here how i followed.
SQL*Plus: Release 9.2.0.1.0 - Production on Mon Oct 8 14:08:29 2007
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Enter user-name: test@test
Enter password: ****
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production
SQL> create table x(photo blob);
Table created.
exporting:
D:\>exp file=x.dmp log=x.log tables='TEST.X'
Export: Release 9.2.0.1.0 - Production on Mon Oct 8 14:09:40 2007
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Username: pavan@test
Password:
Connected to: Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production
Export done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
About to export specified tables via Conventional Path ...
Current user changed to TEST
. . exporting table X 0 rows exported
Export terminated successfully without warnings.
importing:
D:\>imp file=x.dmp log=ximp.log fromuser='TEST' touser='IBT' tables='X'
Import: Release 9.2.0.1.0 - Production on Mon Oct 8 14:10:42 2007
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Username: system@mch
Password:
Connected to: Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP and Oracle Data Mining op
tions
JServer Release 9.2.0.6.0 - Production
Export file created by EXPORT:V09.02.00 via conventional path
Warning: the objects were exported by PAVAN, not by you
import done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
import server uses US7ASCII character set (possible charset conversion)
. importing TEST's objects into IBT
IMP-00017: following statement failed with ORACLE error 959:
"CREATE TABLE "X" ("PHOTO" BLOB) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS "
"255 STORAGE(INITIAL 65536 FREELISTS 1 FREELIST GROUPS 1) TABLESPACE "TESTTB"
"S" LOGGING NOCOMPRESS LOB ("PHOTO") STORE AS (TABLESPACE "TESTTBS" ENABLE "
"STORAGE IN ROW CHUNK 8192 PCTVERSION 10 NOCACHE STORAGE(INITIAL 65536 FREE"
"LISTS 1 FREELIST GROUPS 1))"
IMP-00003: ORACLE error 959 encountered
ORA-00959: tablespace 'TESTTBS' does not exist
Import terminated successfully with warnings.
why it is happening for this table alone?plz help me
thanks in advance

Here is exerpt from {
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:378418239571}
=============================================
Hi Tom,
I have a dump file containing blob datatypes, when i import the dump file in a schema it gives an
error stating that the tablespace for Blob datatype does not exists. My question is how do i import
the dump file in the default tablespace of the importing user.
Followup March 2, 2004 - 7am US/Eastern:
You'll have to precreate the table.
do this:
imp userid=u/p tables=that_table indexfile=that_table.sql
edit that_table.sql, fix up the tablespace references to be whatever you want to be, run that sql.
then imp with ignore=y
for any MULTI-SEGMENT object (iot's with overflows, tables with lobs, partitioned tables, for
example), you have to do this -- imp will not rewrite ALL of the tablespaces in that
multi-tablespace create -- hence you either need to have the same tablespaces in place or precreate
the object with the proper tablespaces.
Only for single tablespace segments will imp rewrite the create to go into the default if the
requested tablespace does not exist.
===================================================
To summarize: precreate target table when importing multi-segment tables

BLOB datatypes in Transparent Gateways

Hi,
Is the BLOB datatype supported in Transparent Gateway data conversions between Oracle 10g R2 and SQL Server?
I couldn't find any information on this in the Documentation on OTN.
Thanks, Ila

Hy,
you never could view blobs via sqlplus
you only could use utl_raw.cast_to_varchar2 if there ist text inside your blobs.
regard
Martin

Conversion of BLOB datatype to CLOB datatype

Hi,
I would need to convert the column datatype from BLOB to CLOB. currently in the table, the BLOB column has the data. the requirement is to convert this column from BLOB to CLOB datatype.
please help me how to convert from BLOB datatype to CLOB datatype
Thanks
Hari.

I have just been dealing with the same issue -- mass conversion of data in BLOB form to CLOB. I think I've finally got it working well. I have a table that has an key column then both a BLOB and a CLOB column. I load the BLOBS into the table then run the following PLSQL block (uses the given proc) to transfer the data from the BLOB column to the CLOB column.
-- Proc to convert BLOB to CLOB
create or replace function stg.blob_to_clob( p_blb in blob ) return clob is
   v_clb   clob    ;
   v_dst   integer := 1 ;
   v_src   integer := 1 ;
   v_wrn   integer ;
   v_lng   integer := dbms_lob.default_lang_ctx ;
begin
   dbms_lob.createtemporary ( v_clb, false ) ;
   dbms_lob.converttoclob
     ( dest_lob      => v_clb
     , src_blob      => p_blb
     , amount        => dbms_lob.lobmaxsize
     , dest_offset   => v_dst
     , src_offset    => v_src
     , blob_csid     => dbms_lob.default_csid
     , lang_context => v_lng
     , warning       => v_wrn
   if ( dbms_lob.NO_WARNING != v_wrn ) then
      v_clb := '~~~{ Error: Invalid Character in source BLOB }~~~' ;
   end if ;
   return v_clb ;
exception
   when others then
      v_clb := '~~~{ Error: BLOB Conversion Function Failed }~~~' ;
      return v_clb ;
end ;
-- Use the proc above to convert each BLOB to a CLOB in the given table.
declare
   cursor c1 is
      /* Select the BLOBS to be converted. */
      select id, m_blob, m_clob
        from stg.temp_cnvrt
              /* Trying to convert NULL BLOBS will result in an error */
       where dbms_lob.getlength(m_blob) > 0
      for update ;
   v_tmp_clob   clob ;
begin
   FOR nxt in c1 LOOP
      v_tmp_clob := stg.blob_to_clob( nxt.m_blob ) ;
      update stg.temp_cnvrt
         set m_clob = v_tmp_clob
       where current of c1 ;
   END LOOP ;
   commit ;
end ;

What is bind syntax for blob datatype for sqlite3

Hi All,
i have written 2 times.
1. sqlite3bind_blob(insertstatement, 1, image, -1, SQLTRANSIT);
it doesn't give compile error but when i run the applilcation it crash the
simulator.
2. sqlite3bind_blob(insertstatement, 1, image, -1);
it gives error like too few arguments.
here image is object of UIImage........
pls anyone can tell me what is proper syntax for binding of blob datatype.
Thankx.
vavdiyaharesh is online now Add to vavdiyaharesh's Reputation Report Post Edit/Delete Message

I wanted to do something similar, but as you mention, there isn't a lot of sample code to copy and paste etc, and I didn't have the time to spend investigating this one issue when plenty of other things needed my attention.
In the end I decided to save my BLOB data as actual files in the document directory and then store a link to these in the database row. Something like primarykey_id_blobname.jpg etc.
Probably not the answer you want, but hopefully it'll get you past a road block and onto the next item on your list.

Will "Save For Later" functionality work on BLOB datatype ?

Hi,
I read funtionality "Save For Later" from ADF Developer Guide. And tested it using JDEVELOPER 11.1.1.6 on a DB table with Number, Date, Varchar2 datatypes.
But can I create a table with BLOB datatype & make use of this functionality?
Thanks in advance for your replies.

Fill free to try, and let us to know ;-)
user4945886 wrote:
But can I create a table with BLOB datatype & make use of this functionality?

Difference between CHAR and VARCHAR2 datatype

Difference between CHAR and VARCHAR2 datatype
CHAR datatype
If you have an employee name column with size 10; ename CHAR(10) and If a column value 'JOHN' is inserted, 6 empty spaces will be inserted to the right of the value. If this was a VARCHAR column; ename VARCHAR2(10). How would it handle the column value 'JOHN' ?

The CHAR datatype stores fixed-length character strings, and Oracle compares CHAR values using blank-padded comparison semantics.
Where as the VARCHAR2 datatype stores variable-length character strings, and Oracle compares VARCHAR2 values using nonpadded comparison semantics.
This is important when comparing or joining on the columns having these datatypes;
SQL*Plus: Release 10.2.0.1.0 - Production on Pzt Au 6 09:16:45 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> conn hr/hr
Connected.
SQL> set serveroutput on
SQL> DECLARE
2 last_name1 VARCHAR2(10) := 'TONGUC';
3 last_name2 CHAR(10) := 'TONGUC';
4 BEGIN
5 IF last_name1 = last_name2 THEN
6 DBMS_OUTPUT.PUT_LINE ( '-' || last_name1 || '- is equal to -' || last_name2
|| '-');
7 ELSE
8 DBMS_OUTPUT.PUT_LINE ( '-' || last_name1 || '- is NOT equal to -' || last_n
ame2 || '-');
9 END IF;
10 END;
11 /
-TONGUC- is NOT equal to -TONGUC -
PL/SQL procedure successfully completed.
SQL> DECLARE
2 last_name1 CHAR(6) := 'TONGUC';
3 last_name2 CHAR(10) := 'TONGUC';
4 BEGIN
5 IF last_name1 = last_name2 THEN
6 DBMS_OUTPUT.PUT_LINE ( '-' || last_name1 || '- is equal to -' || last_name2
|| '-');
7 ELSE
8 DBMS_OUTPUT.PUT_LINE ( '-' || last_name1 || '- is NOT equal to -' || last_n
ame2 || '-');
9 END IF;
10 END;
11 /
-TONGUC- is equal to -TONGUC -
PL/SQL procedure successfully completed.
Also you may want to read related asktom thread - "Char Vs Varchar" http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1542606219593
and http://tahitiviews.blogspot.com/2007/05/less-is-more-more-or-less.html
Best regards.

How to copy a table with LONG and CLOB datatype over a dblink?

Hi All,
I need to copy a table from an external database into a local one. Note that this table has both LONG and CLOB datatypes included.
I have taken 2 approaches to do this:
1. Use the CREATE TABLE AS....
SQL> create table XXXX_TEST as select * from XXXX_INDV_DOCS@ext_db;
create table XXXX_TEST as select * from XXXX_INDV_DOCS@ext_db
ERROR at line 1:
ORA-00997: illegal use of LONG datatype
2. After reading some threads I tried to use the COPY command:
SQL> COPY FROM xxxx/pass@ext_db TO xxxx/pass@target_db REPLACE XXXX_INDV_DOCS USING SELECT * FROM XXXX_INDV_DOCS;
Array fetch/bind size is 15. (arraysize is 15)
Will commit when done. (copycommit is 0)
Maximum long size is 80. (long is 80)
CPY-0012: Datatype cannot be copied
If my understanding is correct the 1st statement fails because there is a LONG datatype in XXXX_INDV_DOCS table and 2nd one fails because there is a CLOB datatype.
Is there a way to copy the entire table (all columns including both LONG and CLOB) over a dblink?
Would greatelly appriciate any workaround or ideas!
Regards,
Pawel.

Hi Nicolas,
There is a reason I am not using export/import:
- I would like to have a one-script solution for this problem (meaning execute one script on one machine)
- I am not able to make an SSH connection from the target DB to the local one (although the otherway it works fine) which means I cannot copy the dump file from target server to local one.
- with export/import I need to have an SSH connection on the target DB in order to issue the exp command...
Therefore, I am looking for a solution (or a workaround) which will work over a DBLINK.
Regards,
Pawel.

Cannot view BLOB datatypes in Oracle10g

After a successful upgrade from Oracle8i to Oracle10g, I cannot view tables with BLOB datatypes. I'm getting the following error in SQL*PLUS upon quering the table:
SP2-0678: Column or attribute type can not be displayed by SQL*Plus
When i try to do the same thing from TOAD, I'm getting this error instead:
A Query with LOB's requires OC18 mode, but OC17 mode is used.
I have also tried to create a new table with BLOB datatype (since i thought the culprit was a broken migrated data) but I got the same error. What am I missing here????

Hy,
you never could view blobs via sqlplus
you only could use utl_raw.cast_to_varchar2 if there ist text inside your blobs.
regard
Martin

Dbms_crypto and blob datatypes

Similar Messages

Maybe you are looking for