In an RDBMS yes, on jBASE (MV platforms) you have to create an index.
Sent from my iPhone
> On Aug 1, 2020, at 8:51 AM, VK wrote:
>
>
> Sorry forgot to mention that there's no field with account number, it's just
> a part of @ID. Isn't @ID a primary index itself?
>
>
>> On Friday, 31 July 2020 17:15:36 UTC+2, VK wrote:
>> Hi coleagues.
>>
>> What is the fastest way to SELECT a set of records from a J4 table:
>>
>> @IDs are in the format: (account_number)-(date_in_internal_format), e.g.
>> 5001-18628.
>>
>> trying:
>>
>> SELECT THE.TABLE WITH @ID BETWEEN "5001-18628" "5001-23012"
>>
>> Result is bit more than a second (Windows 2019 server, enough memory and
>> CPUs). Maybe it can be improved?
>>
>> usr: 1.11 sys: 0.00 elapsed: 0m1.11s
>>
>> Usage of "GE ... LE" didn't help:
>>
>> usr: 1.36 sys: 0.00 elapsed: 0m1.36s
>>
>> Records number: circa 340,000.
>>
>> Resizing didn't help.
>>
>> Conversion to JR, as expected, made things a bit worse.
>>
>> Thought about year-based distribution but haven't given it a try yet.
>>
>> Last question - is jBASE indexing stable enough to be trusted?
>>
>> TAFC 13 (no, question isn't about T24!)
>>
>
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