SQLPlus { sqlterminator | escape }

SQLPlus { sqlterminator | escape }

sqlterminator

 

 

SQLPLUS的sqlterminator参数可以在后面跟 3个东西，分别是ON、OFF和character

 

SQL> set sqlterminator ON|OFF|c

 

c specifies the character that ends an SQL statement. The default is the semicolon (;). 

The sqlterminator cannot be alpha numeric.

 

 

举例如下：

 

SQL> set sqlterminator off
SQL> show sqlterminator
sqlterminator OFF
SQL> select * from dual
  2  ;
  3  /
;
*
ERROR at line 2:
ORA-00911: invalid character

SQL> select * from dual
  2  /

 

D
-
X

 

--关闭之后仅能以"/"来执行该SQL语句

 

SQL> set sqlterminator on
SQL> show sqlterminator
sqlterminator ";" (hex 3b)
SQL> select * from dual
  2  ;

 

D
-
X

 

--打开后默认以";"来结尾

 

SQL> set sqlterminator !
SQL> show sqlterminator
sqlterminator "!" (hex 21)
SQL> select * from dual !

 

D
-
X

--设置其他字符作为sqlterminator

 

SQL> set sqlterminator on
SQL> show sqlterminator
sqlterminator ";" (hex 3b)

 

--设置on之后，依旧改为默认结束代码";"

 

SQL> set sqlterminator OFF
SQL> update  T1
  2  set  A =
  3  'DECLARE
  4   R ID NUMBER := 0 ;
  5  BEGIN
  6  SELECT 1 INTO R ID
  7  FROM dual;
  8  END ;'
  9  where  B= 'xxxx'
10  /

1 row updated.

SQL> commit
  2  /

Commit complete.

SQL> set sqlterminator ON

 

--应用(插入带";"的字符串)

 

 

 

 

 

escape

 

SQLPLUS的escape参数后面可以跟4个东西，分别是ON、OFF、character和"\"

 

SQL> SET ESC[APE] {\| c|ON|OFF}

Defines the character you enter as the escape character. OFF undefines the escape character. ON enables the escape character. ON changes the value of c back to the default "\".

 

简单举例：

 

SQL> set escape on
SQL> show escape
escape "\" (hex 5c)
SQL> select '\' from dual;

'
-

SQL> select '\\' from dual;

'
-
\

SQL> select '\\\' from dual;

'
-
\

SQL> select '\\\\' from dual;

'\
--
\\

--"\"为转义符，转移任意一个它后面的字符

 

SQL> set escape !
SQL> select '\\' from dual;

 

'\
--
\\

 

SQL> select '!\' from dual;

 

'
-
\

 

--使用其他字符作为转义

 

 

 

注意：这里的escape参数与 SQL中的escape函数完全不同

 

 

-The End-