Attribute name images in table headers

Question

Hi all,
it is quite easy to use attribute images for the text values in Publisher. But how can I use the attribute image for the attribute name in Publisher? I would like to have one column with an image in the header and text values to be shown for the attribute values. Is that possible and if not, what for do we have attribute images?
Thanks in advance.
Best regards
Christian

Answer 1

A LOB variable is actually a pointer - or as the documentation calls it, a locator variable. (why they did not call it by its real name, a pointer, needs to be questioned).
The preferred API to use for LOB operations in PL/SQL is DBMS_LOB.
As a LOB variable is a pointer, you do not need to create a copy of the LOB, change the copy, and overwrite the original with the copy. You can directly write to a locked row's LOB when you have a pointer to that LOB  (bypassing the SQL UPDATE statement for example).
SQL> create table tab1( id number, document clob );
Table created.
SQL> -- a row is created with a lob
SQL> insert into tab1 values( 1, 'test123.' );
1 row created.
SQL>SQL> -- updating the lob without an UPDATE statement
SQL> declare
  2          doc     clob;
  3          line    varchar2(32767);
  4  begin
  5          -- create a pointer to the lob
  6          select document into doc from tab1 where id = 1 for update;
  7
  8          -- write to lob in row via pointer
  9          line := ' What do you want, universe? (Klingon translation for "Hello world.")';
10          DBMS_LOB.WriteAppend( doc, length(line), line );
11          commit;
12  end;
13  /
PL/SQL procedure successfully completed.
SQL>SQL> select * from tab1;
        ID DOCUMENT
         1 test123. What do you want, universe? (Klingon translation for "Hello world.")
SQL>