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troubleshooting Question

Transaction locking in postgresql

Avatar of robaherne
robaherne asked on
.NET ProgrammingPostgreSQLASP.NET
2 Comments1 Solution803 ViewsLast Modified:
I'm using asp.net with postgresql and the odbc postgresql driver.

I have a table for generating unique numbers. To get the next number I SELECT the current number, add 1 and then UPDATE with the new number...

//GET CURRENT NUMBER
DocketNumberTable = DocketNumberAdapter.GetAllDocketNumberData();
DocketNumberRow = DocketNumberTable.Select();
DocketNumber = Convert.ToDecimal(DocketNumberRow[0]["docketno"]);

//UPDATE NUMBER +1
DocketNumberAdapter.UpdateDocketNumber(DocketNumber+1);

I want to be able to Lock the table between the SELECT query and the UPDATE query as to avoid any other user intercepting the process and causing a conflict.

I know that this is quite unlikely becuase the time it would take to carry out the two transactions is minimal but I thought it would be good practice and worth knowing.

Many thanks.
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Avatar of ivanovn
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