1 rem -----------------------------------------------------------------------
2 rem URL: http://www.orafaq.com/scripts/plsql/readlong.txt
3 rem Filename: readlong.sql
4 rem Purpose: Fetch Long column values piece-wise from PL/SQL
6 rem Author: Frank Naude (frank@ibi.co.za)
7 rem -----------------------------------------------------------------------
13 create table longtable (longcol long) tablespace TOOLS;
14 insert into longtable values ( rpad('x', 257, 'QWERTY') );
17 cur1 PLS_INTEGER := DBMS_SQL.OPEN_CURSOR;;
19 long_piece VARCHAR2(256);
20 piece_len INTEGER := 0;
21 long_tab DBMS_SQL.VARCHAR2S;
22 long_len INTEGER := 0;
24 DBMS_SQL.PARSE(cur1, 'select longcol from longtable', DBMS_SQL.NATIVE);
25 DBMS_SQL.DEFINE_COLUMN_LONG(cur1, 1);
26 rc := DBMS_SQL.EXECUTE(cur1);
27 rc := DBMS_SQL.FETCH_ROWS(cur1); -- Get one row
29 -- Loop until all pieces of the long column are processed
31 DBMS_SQL.COLUMN_VALUE_LONG(cur1, 1, 256, long_len, long_piece, piece_len);
32 EXIT WHEN piece_len = 0;
33 DBMS_OUTPUT.PUT_LINE('Long piece len='|| piece_len);
35 long_tab( NVL(long_tab.LAST, 0)+1 ) := long_piece; -- Add piece to table
36 long_len := long_len + piece_len;
38 DBMS_SQL.CLOSE_CURSOR(cur1);
39 DBMS_OUTPUT.PUT_LINE('Total long col fetched, len='|| long_len);