Set execution mode for running a query

Configure the execution mode to use when running a query, at the query-level. The execution mode determines whether the query runs using a performance-enhancing engine (V2) or the legacy engine (V1).

Before you begin

Role required: cmdb_query_builder

About this task

A query can run in either of the following execution modes:

• V1: Runs the query using the legacy query execution engine.
• V2: Runs the query using an enhanced query execution engine which is designed for improved performance and scalability.

Note:

When running queries that contain 'OR' nodes, the format of the returned results is different between the two modes.

The system uses query-level settings and system-wide properties, and also checks the query structure, to determine which mode to use. The query-level setting described in this procedure has precedence over system property settings in the decision flow of which engine to use to run a query.

For more information, see CMDB Query Builder engine execution modes.

Procedure

1. Navigate to All and then, in the navigation filter, enter qb_saved_query.list to open the Saved Queries table.
2. In the Saved Queries list view, select the query for which you want to set execution mode.
3. On the query's form, set Query Execution Mode to 'v1' or 'v2'.
4. Select Update.