This is for LONG. For LONG RAW, you could use utl_raw.length
or use a C or Java program to read it and calculate the length.
CREATE OR REPLACE FUNCTION l_length(cTabName varchar2,
cColName varchar2,
cRowid varchar2)
RETURN NUMBER
IS
cur_id integer;
buff varchar2(32767);
len integer;
offset integer;
v_length integer;
stmt varchar2(500);
ret integer;
BEGIN
stmt := ' SELECT '|| cColName || ' FROM ' || cTabName ||
' WHERE rowid = '||''''||cRowid||'''';
cur_id := dbms_sql.open_cursor;
dbms_sql.parse(cur_id, stmt, dbms_sql.NATIVE);
dbms_sql.define_column_long(cur_id, 1);
ret := dbms_sql.execute(cur_id);
IF (dbms_sql.fetch_rows(cur_id) > 0 )
THEN
offset := 0;
len := 0;
LOOP
dbms_sql.column_value_long(cur_id, 1,32767, offset,
buff, v_length);
len := len + v_length;
EXIT WHEN v_length < 32767;
offset := offset + v_length;
END LOOP;
END IF;
dbms_sql.close_cursor(cur_id);
return( len );
END;
/
-----Original Message-----
Sent: Wednesday, February 05, 2003 3:05 PM
To: Multiple recipients of list ORACLE-L
Not easy. If your LONG is shorter than 32767, then you can, in a PL/SQL
function, fetch it into a VARCHAR2 of this size (allowed in PL/SQL) and
aplly LENGTH() to this VARCHAR2. Assuming the suitable Oracle version, I
think there is somewhere a function to convert LONGs to CLOBs - to which
you can apply a function. With Pro*C or the OCIs, you can derived the
length from the error you get when fetching into too small a buffer ...
--
Regards,
Stephane Faroult
Oriole Software
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Stephane Faroult
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