gbase8s之mysql的show命令实现

第一步：生成show.sh脚本

cat /home/gbase/show.sh

#!/bin/bash

#作者：乡村野中医

#创作时间2024-11-21

#脚本名称show.sh

function show(){

#echo $#

if "xdatabases" = x$1

then

echo "select name from sysdatabases;"|dbaccess sysmaster - 2>/dev/null|grep name|sed 's/name/\n/g'

elif "xtables" = x$1

then

if "x" = "x${database_name}"

then

echo '请执行use 库名'

else

#echo "database_name:${database_name}"

echo "select tabname from systables where tabid>99;"|dbaccess $database_name - 2>/dev/null|grep tabname|sed 's/tabname/\n/g'

fi

else

echo '执行命令报错,想查看库请执行show databases'

fi

}

function use(){

if x != x$1

then

read -p "gbase>" s t

if "xshow tables" != x$s$t

then

database_name=$1

#echo "database_name:$database_name"

show tables

fi

else

echo "语法报错,想查看某个库的表请执行 use 库名，show tables"

fi

}

第二步：写入gbasedbt用户的.bash_profile里

su - gbasedbt

echo "source show.sh" >> .bash_profile

第三步：测试命令

1,查看所有库

show databases

2，查看某库的所有业务表

use testdb

>show tables