# Unable to get the span.db.instance field populated when querying Oracle database using profiler auto-instrumentation for .Net

**URL:** <https://discuss.elastic.co/t/unable-to-get-the-span-db-instance-field-populated-when-querying-oracle-database-using-profiler-auto-instrumentation-for-net/357287>\
**Category:** APM\
**Tags:** dotnet\
**Created:** [April 12, 2024, 12:39pm UTC](https://discuss.elastic.co/t/unable-to-get-the-span-db-instance-field-populated-when-querying-oracle-database-using-profiler-auto-instrumentation-for-net/357287 "2024-04-12T12:39:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ghyslaindetry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ghyslaindetry/32/133473_2.png) [@ghyslaindetry](https://discuss.elastic.co/u/ghyslaindetry)\
**Post date:** [April 12, 2024, 12:39pm UTC](https://discuss.elastic.co/t/unable-to-get-the-span-db-instance-field-populated-when-querying-oracle-database-using-profiler-auto-instrumentation-for-net/357287/1 "2024-04-12T12:39:11Z")

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We use the APM .Net profiler to auto-instrument our .Net core apps in IIS.

All is working except that we are unable to get the value of the field **span.db.instance** populated when we query to Oracle DB.

It seems the apm agent is not able to retrieve this information from the connection string.

Is this a known issue ??

We use :

- elastic\_apm\_profiler\_1.26.0-win-x64

- Oracle.ManagedDataAccess.Core/3.21.130

Thank you for your help