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ASE 15.5 can we get bigdatetime in system table sysaudits_xx

Greetings all

In ASE 15.5 : is there a way to convert the datetime column "eventtime" into bigdatetime in sysaudits_xx tables ?

bigdatetime data type was introduced in ASE 15.5. It needs the same 8-byte storage as a datetime data type.

System tables with datetime column are mostly using the normal date time with 1 to 3 ms accuracy.

I am doing login/logout connection monitoring with SAP/Sybase auditing.

And it will help to know connections pressure as precisely as possible.


As note/feedback for SAP/Sybase documentation/manuals

In the reference manual for system tables, systypes still does NOT show bigdatetime

SAP Adaptive Server Enterprise 16.0 > Reference Manual: Tables 16.0 > System Tables

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  • Best Answer
    Posted on Sep 16, 2015 at 06:09 PM

    Thanks Jeroen and Bret for your respective inputs.

    I will close this thread as answered though I do not see a near term solution.

    Thanks again


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  • Posted on Sep 16, 2015 at 07:48 AM

    Changing system tables is not a good idea, that's asking for trouble.

    If 3ms accuracy is not good enough because of the amount of logins, then I guess auditing will be pretty overloaded and a huge bottleneck for just logging the login/logout activity

    And just changing the datatype in the audit tables is probably not sufficient anyway, because the auditing system is most likely inserting the eventtime as datetime. The insert will go fine, but you just get an implicit converted value from datetime to bigdatetime

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    • This would only be possible in a future version.

      In general we are reluctant to make such changes without a strong need for it as it breaks backward-compatibility (i.e. existing applications that expect the column to be a datetime may break if the column is changed to be a bigdatetime). So this sort of change is only likely to be made as part of a major version upgrade.


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