oracle的DBMS_SQL中动态游标的使用资料搜集
资料一“
CREATE OR REPLACE PROCEDURE do_query_2 (sql_stmt VARCHAR2) IS
TYPE curtype IS REF CURSOR;
src_cur curtype;
curid NUMBER;
desctab DBMS_SQL.DESC_TAB;
colcnt NUMBER;
namevar VARCHAR2(50);
numvar NUMBER;
datevar DATE;
empno NUMBER := 100;
BEGIN
-- sql_stmt := SELECT ... FROM employees WHERE employee_id = :b1';
-- Open REF CURSOR variable:
--OPEN src_cur FOR sql_stmt USING empno;
OPEN src_cur FOR sql_stmt ;
-- Switch from native dynamic SQL to DBMS_SQL package:
curid := DBMS_SQL.TO_CURSOR_NUMBER(src_cur);
DBMS_SQL.DESCRIBE_COLUMNS(curid, colcnt, desctab);
-- Define columns:
FOR i IN 1 .. colcnt LOOP
IF desctab(i).col_type = 2 THEN
DBMS_SQL.DEFINE_COLUMN(curid, i, numvar);
ELSIF desctab(i).col_type = 12 THEN
DBMS_SQL.DEFINE_COLUMN(curid, i, datevar);
-- statements
ELSE
DBMS_SQL.DEFINE_COLUMN(curid, i, namevar, 50);
END IF;
END LOOP;
-- Fetch rows with DBMS_SQL package:
WHILE DBMS_SQL.FETCH_ROWS(curid) > 0 LOOP
FOR i IN 1 .. colcnt LOOP
IF (desctab(i).col_type = 1) THEN
DBMS_SQL.COLUMN_VALUE(curid, i, namevar);
DBMS_OUTPUT.PUT(namevar);
ELSIF (desctab(i).col_type = 2) THEN
DBMS_SQL.COLUMN_VALUE(curid, i, numvar);
DBMS_OUTPUT.PUT(numvar);
ELSIF (desctab(i).col_type = 12) THEN
DBMS_SQL.COLUMN_VALUE(curid, i, datevar);
DBMS_OUTPUT.PUT(datevar);
-- statements
END IF;
END LOOP;
DBMS_OUTPUT.NEW_LINE;
END LOOP;
DBMS_SQL.CLOSE_CURSOR(curid);
END;
/
资料二：
dbms_sql 动态输出列
create or replace procedure dump_query( p_query in varchar2 )
is
l_columnValue varchar2(4000);
l_status integer;
l_colCnt number default 0;
l_cnt number default 0;
l_line long;
/* We'll be using this to see how many columns
* we have to fetch so we can define them and
* then retrieve their values.
*/
l_descTbl dbms_sql.desc_tab;
/* Step 1 - open cursor. */
l_theCursor integer default dbms_sql.open_cursor;
begin
/* Step 2 - parse the input query so we can describe it. */
dbms_sql.parse( l_theCursor, p_query, dbms_sql.native );
/* Step 3 - now, describe the outputs of the query. */
dbms_sql.describe_columns( l_theCursor, l_colCnt, l_descTbl );
/* Step 4 - we do not use in this example, no BINDING needed.
* Step 5 - for each column, we need to define it, tell the database
* what we will fetch into. In this case, all data is going
* to be fetched into a single varchar2(4000) variable.
*/
for i in 1 .. l_colCnt
loop
dbms_sql.define_column( l_theCursor, i, l_columnValue, 4000 );
end loop;
/* Step 6 - execute the statement. */
l_status := dbms_sql.execute(l_theCursor);
/* Step 7 - fetch all rows. */
while ( dbms_sql.fetch_rows(l_theCursor) > 0 )
loop
/* Build up a big output line, this is more efficient than calling
* DBMS_OUTPUT.PUT_LINE inside the loop.
*/
l_cnt := l_cnt+1;
l_line := l_cnt;
/* Step 8 - get and process the column data. */
for i in 1 .. l_colCnt loop
dbms_sql.column_value( l_theCursor, i, l_columnValue );
l_line := l_line || ',' || l_columnValue;
end loop;
/* Now print out this line. */
dbms_output.put_line( l_line );
end loop;
/* Step 9 - close cursor to free up resources.. */
dbms_sql.close_cursor(l_theCursor);
exception
when others then
dbms_sql.close_cursor( l_theCursor );
raise;
end dump_query;
资料三：
以上只是11g的方法，如果不是，可以检索时将所有字段连接在一起，然后SPLIT