11g の Oracle 組み込みパッケージ DBMS_SQL では関数 TO_CURSOR_NUMBER が提供されているため、「この関数は、OPEN された強くまたは弱く型付けされた参照カーソルを取得し、それを DBMS_SQL カーソル番号に変換します。」
コード例:
DECLARE
l_cursor SYS_REFCURSOR;
FUNCTION generateData(p_dataCursor IN SYS_REFCURSOR)
RETURN VARCHAR2 AS
curs SYS_REFCURSOR := p_dataCursor;
l_cursorid NUMBER;
l_column_count INTEGER;
l_describe_table DBMS_SQL.DESC_TAB;
l_numvar NUMBER;
l_ignore INTEGER;
l_value VARCHAR2(2000);
l_coma VARCHAR2(10);
crlf VARCHAR2(2) := chr(13)||chr(10);
lv_message VARCHAR2(32000);
BEGIN
l_cursorid := dbms_sql.to_cursor_number( curs );
dbms_sql.describe_columns( l_cursorid, l_column_count, l_describe_table );
FOR i IN 1..l_column_count LOOP
dbms_sql.define_column(l_cursorid, i, l_value, 2000);
END LOOP;
LOOP
IF DBMS_SQL.FETCH_ROWS(l_cursorid)>0 THEN
l_coma := '';
FOR i IN 1..l_column_count LOOP
dbms_sql.column_value(l_cursorid, i, l_value);
lv_message := lv_message || l_coma || l_value;
l_coma := ',';
END LOOP;
lv_message := lv_message || crlf;
ELSE
EXIT;
END IF;
END LOOP;
dbms_sql.close_cursor( l_cursorid );
RETURN lv_message;
END;
BEGIN
open l_cursor FOR 'SELECT 1 as A, 2 AS B, 3 AS C, 4 AS D FROM DUAL UNION ALL SELECT 1 as A, 2 AS B, 3 AS C, 4 AS D FROM DUAL';
dbms_Output.put_Line(generateData(l_cursor));
END;
/