How are you doing locking to prohibit two people from getting the same value? Is the ID table buffered?


>I save last ID in special table. Next ID will be as LastID+1.
>
>
>>How are you generating the IDs?
>>
>>
>>>Hi!
>>>Have a problem with primary ID field in a table. I shall be glad if you will help.
>>>
>>>Legend:
>>>VFP 5.0, Win2000 and about 10 very active users.
>>>
>>>We have a table with primary key on ID field N(13,0).
>>>The table is consist of 400`000 records. Every day users add 5000 new rows in this table.
>>>
>>>Every day (!!!) programmer find 2-5 broken ID value (only in ID field).
>>>Good ID value looks like 3010000001234.
>>>Broken ID value looks like |010000001234 or 3|10000001234 (character symbol in first or second position in NUMERIC field). VFP understand this bad ID as 0 and 3. And it means that every day programmer find in the table _several_ rows with the same ID=0 (or ID=3) – the purpose of primary key is not work. Transaction mechanism was not help.
>>>
>>>The main trouble is: except this work place there are 16 similar sites with 2-5 users and 1-2 broken ID for a week (…and without local support).
>>>
>>>Need idea!
>>>Thank you!