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This mode is established from a given connection and implies certain special behavior. Only the sentences executed from that connection will be executed by the Denodo Virtual DataPort server. The sentences emitted from any other connection will be queued until the server exits the single user mode.

It is strongly recommended to switch to single user mode before importing metadata to avoid errors in concurrent queries executed over the views changed when importing new elements into a Virtual DataPort database.

To activate single user mode the following VQL command must be executed from a connection:

ENTER SINGLE USER MODE

Only administrator users can switch to single user mode using this command. To exit single user mode enter the following command:

EXIT SINGLE USER MODE

References

Advanced VQL Guide: Importing Metadata

Virtual DataPort Administration Guide: Exporting and Importing the Server Metadata

Disclaimer
The information provided in the Denodo Knowledge Base is intended to assist our users in advanced uses of Denodo. Please note that the results from the application of processes and configurations detailed in these documents may vary depending on your specific environment. Use them at your own discretion.
For an official guide of supported features, please refer to the User Manuals. For questions on critical systems or complex environments we recommend you to contact your Denodo Customer Success Manager.

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