mes 入库单号 锁表方案

 

1. 提取单别

create table z_doctype as

select distinct substr(INSTRUCTION_NUM, 0, 3) doctype from Z_INSTRUCTION_DOC where INSTRUCTION_NUM not like 'PP%'

 

单别表结构

 

程序优化方案如下:

me 入库单 优化-防止多人入库取到同一个单号方案

1. 原本取下一个单号的逻辑不变
2. 在取原本取下一个单号前加一个 锁表逻辑  执行语句

                  select * from Z_DOCTYPE where DOCTYPE='单据前缀' for update nowait

1. 上面的行锁 会随着  事物的  提交而自动解锁,无需其他代码

 

取最大单号表sql

select nvl2(max(INSTRUCTION_NUM),

'AGK' || to_char(sysdate, 'yyyymmdd') || substr( '0000'|| to_char(to_number(substr(max(INSTRUCTION_NUM), -4)) + 1),-4),

'AGK' || to_char(sysdate, 'yyyymmdd') || '0001'

)

from Z_INSTRUCTION_DOC t where INSTRUCTION_NUM like 'AGK' || to_char(sysdate, 'yyyymmdd') || '%';

 

select max(INSTRUCTION_NUM) from Z_INSTRUCTION_DOC t where INSTRUCTION_NUM like 'AGK' || to_char(sysdate, 'yyyymmdd') || '%'

 

 

c# 技术验证代码

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

 

namespace 取单号锁表测试

{

public partial class Form1 : Form

{

string constring = @"Data Source=10.8.1.132:1521/MP1;User Id=wipdba;Password=Init1234";

FluentData.IDbContext db = null;

 

public Form1()

{

InitializeComponent();

}

 

private void Form1_Load(object sender, EventArgs e)

{

db = new FluentData.DbContext().ConnectionString(constring, new FluentData.OracleProvider(), "Oracle.ManagedDataAccess.Client");

 

string sqlString = "select DOCTYPE from Z_DOCTYPE t";

List<string> doctype = db.Sql(sqlString).QueryMany<string>();

comboBox1.DataSource = doctype;

 

 

}

 

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

{

 

string sqlString = "select max(INSTRUCTION_NUM) from Z_INSTRUCTION_DOC t where INSTRUCTION_NUM like '" + comboBox1.Text + "' || to_char(sysdate, 'yyyymmdd') || '%'";

string x = db.Sql(sqlString).QuerySingle<string>();

 

textBox2.Text = x;

}

 

private void button1_Click(object sender, EventArgs e)

{

try

{

textBox1.Text = "";

db.UseTransaction(true);

string sqlString = "select * from Z_DOCTYPE where DOCTYPE='" + comboBox1.Text + "' for update nowait ";

db.Sql(sqlString).Execute();

 

 

 

sqlString = "select nvl2(max(INSTRUCTION_NUM), " +

" '" + comboBox1.Text + "' || to_char(sysdate, 'yyyymmdd') || substr( '0000'|| to_char(to_number(substr(max(INSTRUCTION_NUM), -4)) + 1),-4), " +

" '" + comboBox1.Text + "' || to_char(sysdate, 'yyyymmdd') || '0001' " +

" ) " +

"from Z_INSTRUCTION_DOC t where INSTRUCTION_NUM like '" + comboBox1.Text + "' || to_char(sysdate, 'yyyymmdd') || '%'";

 

textBox1.Text = db.Sql(sqlString).QuerySingle<string>();

 

 

}

catch (Exception ex)

{

db.Rollback();

MessageBox.Show(ex.Message);

}

 

}

 

private void button2_Click(object sender, EventArgs e)

{

try

{

db.Commit();

MessageBox.Show("ok");

}

catch (Exception ex)

{

 

MessageBox.Show(ex.Message);

}

}

}

}