Win a copy of Svelte and Sapper in Action this week in the JavaScript forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Ron McLeod
  • Paul Clapham
  • Bear Bibeault
  • Junilu Lacar
Sheriffs:
  • Jeanne Boyarsky
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • salvin francis
  • Frits Walraven
Bartenders:
  • Scott Selikoff
  • Piet Souris
  • Carey Brown

How to generated unique value by Java and mysql

 
Greenhorn
Posts: 14
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I need to generate a unique no. in the format like
yyyymmddxxxxxx (xxxxxx 6-digitl running number)

I think of create a table with two columns

date value
20050405 120
20050406 99

Everytime, the application will increase the value+1 based on the same date. If not date found, create one record and value = 1

The problem is that since there's no transaction at mysql 4.1.x that even the application
1. insert value
2. max() to get
max() may not get the value just insert BECAUSE there may be MULTI-threads/users

How can implement so with Java and mysql?
 
BWA HA HA HA HA HA HA! Tiny ad:
Thread Boost feature
https://coderanch.com/t/674455/Thread-Boost-feature
    Bookmark Topic Watch Topic
  • New Topic