近期的一个项目中需要用到Rails访问Oracle，项目本身连接的是mysql

?

1、在Gemfil中增加所需的gem

gem ruby-oci8 #ruby使用Oracle提供的OCI8接口连接Oracle的接口
bundle install

2、创建连接

connection=OCI8.new("ceshi","ceshi","127.0.0.1:1521/ceshi") #参数分别为用户名、密码和实例

3、查询

查询单条记录

1.9.2p320 :005 > connection.select_one("select lsh,line from web_output_data where rownum=1")
 => ["923536", "2011.05\u00012393.00\u00012011.03.21\u0001478.60"] #返回结果是个数组

?查询返回多条记录

 def select_all(sql,*bindvars)
    connection =self.connection
    rs = Array.new
    connection.exec(sql,*bindvars) do |row|
      rs << row
    end
    connection.logoff
    rs
 end

?4、插入、更新、删除

  def update(sql,*bindvars)
    conn = self.connection
    rs=conn.exec(sql,*bindvars)
    conn.commit
    conn.logoff
    rs
  end                                                                                   //OracleAccess.new.update("update user set name=:1,age=:2",'litbadboy',25)

?5、存储过程的调用

def list(dwm) 
    conn = self.connection
    proc = "begin proc_name(:1,:2,:3);end;"
    cursor=conn.parse(proc)
    cursor.bind_param(':1',dwm,String) #输入参数
    cursor.bind_param(':2',nil,String)     #输出参数
    cursor.bind_param(':3',nil,String)     #输出参数
    cursor.exec()
    lsh=cursor[':2'] 
    msg=cursor[':3'] 
    cursor.close
    conn.logoff
    [lsh,msg] 
end

?6、函数调用

 def self.lsh
    proc="begin :1 := wsbs_interface.getlsh;end;"
    cursor =access.parse(proc)
    cursor.bind_param(':1',nil,String)
    cursor.exec()
    seq=cursor[':1']
    cursor.close
    seq
  end

?