DEFINE_COLUMN_RAW v17

The DEFINE_COLUMN_RAW procedure defines a RAW column or expression in the SELECT list to be returned and retrieved in a cursor.

DEFINE_COLUMN_RAW(<c> NUMBER, <position> NUMBER, <column> RAW,
  <column_size> NUMBER)

Parameters

c

Cursor id of the cursor associated with the SELECT command.

position

Position of the column or expression in the SELECT list being defined.

column

A RAW variable.

column_size

The maximum length of the returned data. Returned data exceeding column_size is truncated to column_size characters.

DEFINE_COLUMN_LONG

The DEFINE_COLUMN_LONG procedure defines a long column for a SELECT cursor.

DEFINE_COLUMN_LONG(<c> NUMBER, <position> NUMBER)

Parameters

c

Cursor id of the cursor for a row defined to be selected.

position

Position of the column in a row being defined.

Examples

This example shows an anonymous block that defines a long column in the SELECT list using DEFINE_COLUMN_LONG procedure. It returns a part of the LONG column value into a variable using procedure COLUMN_VALUE_LONG.

DECLARE
    curid          NUMBER;
    v_ename        VARCHAR(20);
    sql_stmt       VARCHAR2(50) := 'SELECT ename ' || ' FROM emp WHERE empno
                                 = 7844';
    v_status       INTEGER;
    v_length       INTEGER;
BEGIN
    curid := DBMS_SQL.OPEN_CURSOR;
    DBMS_SQL.PARSE(curid, sql_stmt, DBMS_SQL.native);
    DBMS_SQL.DEFINE_COLUMN_LONG(curid, 1);
    v_status := DBMS_SQL.EXECUTE(curid);
    v_status := DBMS_SQL.FETCH_ROWS(curid);
    DBMS_SQL.COLUMN_VALUE_LONG(curid, 1, 7, 0, v_ename, v_length);
    DBMS_OUTPUT.PUT_LINE('ename: ' || v_ename || ' & length: ' || v_length);
    DBMS_SQL.CLOSE_CURSOR(curid);
END;

ename: TURNER & length: 6