在Golang中执行SQL Plus命令

Question

I need to run a .sql file in Golang with Sql Plus, which creates a table and a file named tb_data_20180502104923. I named the .sql script as tb_data_20180502104923.sql with contents as follows:

set headsep off
set pagesize 0
set trimspool on
set trimout on
create table tb_data_20180502104923
as
select * from tb_data;
spool tb_data_20180502104923.txt
SELECT data_id||';'||data_content FROM tb_data_20180502104923;
spool off

I have tried this with os/exec like this:

func main(){
    cmd := exec.Command("sqlplus -s admin/123#@172.10.1.211:1521/orcl < tb_data_20180502104923.sql")

    var out, stderr bytes.Buffer

    cmd.Stdout = &out
    cmd.Stderr = &stderr

    err := cmd.Run()
    if err != nil {
        log.Fatalf("Error executing query. Command Output: %+v
: %+v, %v", out.String(), stderr.String(), err)
    }
}

Which return me an error message:

2018/05/02 11:06:46 Error executing query. Command Output: 
: , fork/exec sqlplus -s admin/123#@172.10.1.1:1521/orcl < tb_data_20180502104923.sql: no such file or directory
exit status 1

And if I change the cmd := exec.Command statement to:

cmd := exec.Command("sqlplus", "-s", "admin/123#@172.10.1.211:1521/orcl", "< tb_data_20180502104923.sql")

It return me nothing, and both tabel & file tb_data_20180502104923 did not created.

Where did I do it wrong, or is using Sql Plus not possible in Golang? And if it's not possible, is there any other way to do what I need?

Answer 1

Allright, nevermind, looks like it's just my poor understanding on how to use os/exec.

So in case someone doesn't know how to use it, here how I solve my own problem.

I change

cmd := exec.Command("sqlplus", "-s", "admin/123#@172.10.1.211:1521/orcl", "< tb_data_20180502104923.sql")

to

cmd := exec.Command("bash", "-c", "sqlplus -s admin/123#@172.10.1.211:1521/orcl < tb_data_20180502104923.sql")

The first parameter bash is the kind of Shell you want to use,

the second parameter -c is the argument of bash,

and the third parameter is the command which I want to execute.

Well, correct me if I'm wrong.