PL/SQL中的动态循环
我目前正在使用以下内容循环PL/SQL中的值:PL/SQL中的动态循环,sql,oracle,plsql,Sql,Oracle,Plsql,我目前正在使用以下内容循环PL/SQL中的值: for c in (select * from example_table where name is not null) loop -- logic end loop; 我想用动态语句替换SQL语句,例如: l_sql := 'select * from example_table where || l_col || is not null'; for c in (l_sql) loop -- logic end
for c in (select * from example_table where name is not null) loop
-- logic
end loop;
我想用动态语句替换SQL语句,例如:
l_sql := 'select * from example_table where || l_col || is not null';
for c in (l_sql) loop
-- logic
end loop;
这可能吗
致以最诚挚的问候隐式光标循环不可能实现这一点(为循环选择inside
)。您可以使用传统的OPEN。。取来使用记录变量tablename%ROWTYPE
DECLARE
t_rec example_table%ROWTYPE;
l_sql VARCHAR2(1000);
v_cur SYS_REFCURSOR;
l_col varchar2(32) := 'MY_COLUMN';
BEGIN
l_sql := 'select * from example_table where '|| l_col || ' is not null';
OPEN v_cur FOR l_sql;
LOOP
FETCH v_cur INTO t_rec; --fetch a row
EXIT WHEN v_cur%NOTFOUND;
-- your logic using t_rec columns.
END LOOP;
CLOSE v_cur;
END;
/
对于隐式光标循环,这是不可能的(为循环选择inside)。您可以使用传统的OPEN。。取来使用记录变量tablename%ROWTYPE
DECLARE
t_rec example_table%ROWTYPE;
l_sql VARCHAR2(1000);
v_cur SYS_REFCURSOR;
l_col varchar2(32) := 'MY_COLUMN';
BEGIN
l_sql := 'select * from example_table where '|| l_col || ' is not null';
OPEN v_cur FOR l_sql;
LOOP
FETCH v_cur INTO t_rec; --fetch a row
EXIT WHEN v_cur%NOTFOUND;
-- your logic using t_rec columns.
END LOOP;
CLOSE v_cur;
END;
/
你想要这样的吗?你想要这样的吗?