如何从SQL*PLUS向shell传递变量

如何从SQL*PLUS向shell传递变量

作者：eygle 发表于 2005-04-11 23:23 最后更新于 2006-12-11 12:14 | English Version
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http://www.eygle.com/archives/2005/04/eciosqlplusieos.html

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 论坛上有人问这个问题，说无法通过sqlplus向shell传递变量，写了一个简单的脚本进行折中处理，供参考:

[oracle@jumper oracle]$ cat a.sh sqlplus -S "/ as sysdba" << ! set heading off col today noprint column today new_val dat select to_char( sysdate, 'yyyy-mm-dd') today from dual; host echo 'today is ' &dat exit; exit; ! [oracle@jumper oracle]$ ./a.sh  today is  2005-04-11  [oracle@jumper oracle]$  

itpub上的Toms_zhang朋友提供了另外一种方法:

[oracle@jumper oracle]$ more a.sh

#!/bin/ksh
VALUE=`sqlplus -silent "/ as sysdba" < < END
set pagesize 0 feedback off verify off heading off echo off 
select max(sequence#) from v\\\$log_history;
exit;
END`

if [ -z "$VALUE" ]; then
echo "No rows returned from database"
exit 0
else
echo "Max Sequence Number: $VALUE" 
fi


[oracle@jumper oracle]$ ./a.sh
Max Sequence Number:        17

我有另一种类似的需求，在sqlplus中执行一段PL/SQL后，得到一个变量，然后再把这个变量的值用host传给shell，上述的两种方式就不适用了。请问有其他方式吗?

Posted by: ArseneFang at June 14, 2005 2:30 PM

To ArseneFang;

可以这样写:

SQL> col inst new_val instance_name
SQL> select instance_name inst from v$instance;

INST
----------------
conner

SQL> host echo &instance_name
conner

Posted by: eygle at June 14, 2005 10:06 PM