I’m stuck in a concurrency problem.
Is a typical problem where the user sends 2 o 3 transactions to persists some data that SHOULD NOT BE duplicated in the DB, in case of a duplicate record you should return an error.
This problem is easy when you can just add an index (unique) to a column where you store a hash.
But in this case, I have a huge table (probably millions of records) and I can’t just modify the table.
In fact, we have a column where we store a hash of the data that should not be duplicated but a unique index was not set .
I’m trying on my java code to check if exists just before the flush, still getting duplicates.
My possible solutions for this are:
- Create a trigger that checks if the hash that I’m trying to inserts already exists on the table.
- Create another table to store unique indexes for this table and add a foreign key to the main table.
- Sit on fetal position and cry
✓ Extra quality
ExtraProxies brings the best proxy quality for you with our private and reliable proxies
✓ Extra anonymity
Top level of anonymity and 100% safe proxies – this is what you get with every proxy package
✓ Extra speed
1,ooo mb/s proxy servers speed – we are way better than others – just enjoy our proxies!
USA proxy location
We offer premium quality USA private proxies – the most essential proxies you can ever want from USA
Our proxies have TOP level of anonymity + Elite quality, so you are always safe and secure with your proxies
Use your proxies as much as you want – we have no limits for data transfer and bandwidth, unlimited usage!
Superb fast proxy servers with 1,000 mb/s speed – sit back and enjoy your lightning fast private proxies!
99,9% servers uptime
Alive and working proxies all the time – we are taking care of our servers so you can use them without any problems
No usage restrictions
You have freedom to use your proxies with every software, browser or website you want without restrictions
Perfect for SEO
We are 100% friendly with all SEO tasks as well as internet marketing – feel the power with our proxies
Buy more proxies and get better price – we offer various proxy packages with great deals and discounts
We are working 24/7 to bring the best proxy experience for you – we are glad to help and assist you!