Errors

They are 4 custom errors describing the reasons why the queries fail and what to do.

InvalidQueryException

• Happens when: error is due to an an invalid query from the user
• Example: an "opendp" pipeline which is not a measurement, not enough budget for query
• What to do: Based on the specific error message, the user should check and fix their relevant query parameters.

ExternalLibraryException

• Happens when: error comes from an external differential privacy library ("smartnoise-sql" or "opendp").
• Example: invalid values in Smartnoise-SQL mechanisms parameter.
• What to do: Based on the specific error message, the user should check and fix their "smartnoise-sql" query parameter or "opendp" pipeline parameter.

UnauthorizedAccessException

• Happens when: user tries to query a dataset without sufficient authorisation:
  • when the user does not exist,
  • when the user does not have access to the dataset,
  • when the user may not query.
• Example: user tries to query a dataframe to which they do not have access
• What to do: The user should decrease the budget parameters and check their access rights.

InternalServerException

• Happens when: there are internal issues within the server.
• Example: failed startup of the server
• What to do: contact the administrative team for help. Users are not responsible for the failure of their request.

This error should never occur while the server is deployed.