一、产生该提示原因
plsql dev在用户运行过程中，要收集用户统计信息，但是由于你现在登录的用户没有访问v$session,v$sesstat and v$statname视图的权限，所以不能收集当前用户的统计信息，和plsql dev工具中配置的Automatic Statistics相冲突，所以就出现了这个提示，试验验证：
[oracle@xifenfei ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Thu Nov 10 04:31:57 2011
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
sys@XFF>create user chf identified by xifenfei;
User created.
sys@XFF>grant create session,resource to chf;
Grant succeeded.
sys@XFF>conn chf/xifenfei
Connected.
chf@XFF>select * from session_privs;
PRIVILEGE
----------------------------------------
CREATE SESSION
UNLIMITED TABLESPACE
CREATE TABLE
CREATE CLUSTER
CREATE SEQUENCE
CREATE PROCEDURE
CREATE TRIGGER
CREATE TYPE
CREATE OPERATOR
CREATE INDEXTYPE
10 rows selected.
chf@XFF>SELECT TABLE_NAME FROM USER_TAB_PRIVS;
no rows selected
创建一个chf用户，授权create session,resource，无v$session,v$sesstat and v$statname视图访问权限，使用plsql dev登录并查询user_tables表(登录时不会提示，只有用户执行了查询或者相关类此操作时候才会提示)
二、解决问题
根据警告提示，可以有两种方法解决这种警告
1、关闭plsql dev统计功能
在 Tools->Preferences->Options里 把Automatic Statistics前的那个勾子去掉，保存
2、给访问用户授权访问相关视图
授权访问v_$session,v_$sesstat,v_$statname,注意不能直接对v$视图进行授权
chf@XFF>conn / as sysdba
Connected.
sys@XFF>grant select on v_$session to chf;
Grant succeeded.
sys@XFF>grant select on v_$sesstat to chf;
Grant succeeded.
sys@XFF>grant select on v_$statname to chf;
Grant succeeded.
sys@XFF>conn chf/xifenfei
Connected.
chf@XFF>SELECT TABLE_NAME FROM USER_TAB_PRIVS;
TABLE_NAME
------------------------------
V_$SESSION
V_$SESSTAT
V_$STATNAME