Linux/Unix shell 参数传递到SQL脚本

　　在数据库运维的过程中，Shell 脚本在很大程度上为运维提供了极大的便利性。而shell 脚本参数作为变量传递给SQL以及SQL脚本也是DBA经常碰到的情形之一。本文主要讨论了如何将shell脚本的参数传递到SQL脚本之中并执行SQL查询。

　　有关shell与SQL之间的变量传递，请参考：Linux/Unix shell sql 之间传递变量

　　1、启动sqlplus时执行脚本并传递参数

robin@SZDB:~/dba_scripts/custom/awr> more tmp.sh
#!/bin/bash

# ----------------------------------------------
#  Set environment here
#  Author : Robinson Cheng
#  Blog   : http://blog.csdn.net/robinson_0612
# ----------------------------------------------

if [ -f ~/.bash_profile ]; then
    . ~/.bash_profile
fi

if [ -z "${1}" ] || [ -z "${2}" ] || [ -z "${3}" ] ;then
    echo "Usage: "
    echo "      `basename $0` <ORACLE_SID> <begin_dat> <end_date>"
    read -p "please input begin ORACLE_SID:" ORACLE_SID
    read -p "please input begin date and time(e.g. yyyymmddhh24):" begin_date
    read -p "please input end date and time(e.g. yyyymmddhh24):" end_date
else
    ORACLE_SID=${1}
    begin_date=${2}
    end_date=${3}
fi

export ORACLE_SID begin_date end_date

#Method 1: pass the parameter to script directly after script name
sqlplus -S gx_adm/gx_adm @/users/robin/dba_scripts/custom/awr/tmp.sql $begin_date $end_date

exit

robin@SZDB:~/dba_scripts/custom/awr> more tmp.sql
SELECT snap_id， dbid， snap_level
  FROM dba_hist_snapshot
 WHERE TO_CHAR (begin_interval_time， 'yyyymmddhh24') = '&1'
       AND TO_CHAR (end_interval_time， 'yyyymmddhh24') = '&2';
exit;

　　2、在SQL提示符下传递参数

robin@SZDB:~/dba_scripts/custom/awr> more tmp2.sh
#!/bin/bash

# ----------------------------------------------
#  Set environment here
#  Author : Robinson Cheng
#  Blog   : http://blog.csdn.net/robinson_0612
# ----------------------------------------------

if [ -f ~/.bash_profile ]; then
    . ~/.bash_profile
fi

if [ -z "${1}" ] || [ -z "${2}" ] || [ -z "${3}" ] ;then
    echo "Usage: "
    echo "      `basename $0` <ORACLE_SID> <begin_dat> <end_date>"
    read -p "please input begin ORACLE_SID:" ORACLE_SID
    read -p "please input begin date and time(e.g. yyyymmddhh24):" begin_date
    read -p "please input end date and time(e.g. yyyymmddhh24):" end_date
else
    ORACLE_SID=${1}
    begin_date=${2}
    end_date=${3}
fi

export ORACLE_SID begin_date end_date

#Method 2: pass the parameter in SQL prompt. Using the same method with method 1
sqlplus -S " / as sysdba" <<EOF
@/users/robin/dba_scripts/custom/awr/tmp.sql $begin_date $end_date
exit;
EOF
exit