Search for jobs related to This step results in a query that is not supported in directquery mode or hire on the world's largest freelancing marketplace with 22m+ jobs. For more information, see Relationships with a many-many cardinality in Power BI Desktop. Performance issues or query failures can arise if the cardinality is large because of the one-million row limit. Experiment with setting Assume referential integrity. However, there is a limit on the number of queries that can be sent in parallel, imposed by the Power BI environment and the Maximum Connections per Data Source model setting, as described above. Power Query Editor translates a complex query into a single SQL query. For example, to retrieve to the sales orders that were created in the last year (relative to today's date). Avoid relationships on 'uniqueidentifier' columns. Group - is the dimension table that groups a set of users. Such traces can contain useful information about the details of how the query executed, and how to improve it. Visual totals: By default, tables and matrices display totals and subtotals. I have a similar problem. This approach makes it easier to interpret the trace file. Queries defined in Power Query Editor must be valid within this context. No clustering: When you use DirectQuery, you can't use the clustering capability to automatically find groups. You should also try to isolate issues to an individual visual before you look at many visuals on a page. It's fine when the median is to be calculated over a relatively small number of results, but performance issues (or query failures due to the 1 million-row limit) will occur if the cardinality is large. What are the benefits that the Hybrid table brings in this scenario? Each AnalysisServicesWorkspace folder includes a Data subfolder that contains the trace file FlightRecorderCurrent.trc for the current Power BI session. Users are reporting slow report performance due to this usage of DirectQuery. If the data is continually changing, and it's necessary for reports to show the latest data, using import with scheduled refresh might not meet your needs. Complete queries using M expressions sometimes does not work. Find out more about the online and in person events happening in March! When you use DirectQuery to connect to a data source in Power BI Desktop, the following results occur: You use Get Data to select the source. I see myself eventually . For example, when you use import to connect to SQL Server Analysis Services, you define a query against the external SQL Server Analysis Services source, and import the data. Tiles that are based on DirectQuery datasets refresh automatically by sending queries to the underlying data sources on a schedule. Each query group has the following events: A Query Begin and Query End event, which represent the start and end of a DAX query generated by changing a visual or filter in the Power BI UI, or from filtering or transforming data in the Power Query Editor. If your using SQL try right clicking a step and see if "View native query" is not grayed out then it is folding just fine. Using DirectQuery has some potentially negative implications. DirectQuery to Power BI Datasets In the composite model, you cannot only use DirectQuery to SQL Server, Oracle, and some other DirectQuery sources, But you can also create a DirectQuery connection to a Power BI Dataset. kusto) then you would need to add a custom step of Value.Metadata()[QueryFolding] to see if it folds or not. Power BI will translate its internal queries into queries that get send to the underlying data sources . When hidden, it is not available in the Fields pane and so cannot be used to configure a visual. This could include even the simplist of dax queries which happened during model validation like distince count of values in each column that there is a relationship too, or it put as a filter/legend. For example, the Sales and Geography tables are related by two columns: CountryRegion and City. You can also consider adding surrogate key columns to dimension-type tables, which is a common practice in relational data warehouse designs. The same is true for selecting a visual to cross-highlight other visuals, or changing a filter. If refreshing each visual, for example after changing a slicer value, takes less than five seconds, the experience is reasonable, although might feel sluggish compared to the immediate response with imported data. Hide the one-side column of relationships: The one-side column of a relationship should be hidden. I doubt it was caused by Desktop versionMaybe you could check the whole M query in Advanced Editor to find out if there are steps that are not supported in DQ mode. This approach initially eliminates certain components, such as the Power BI gateway. Examine the use of calculated columns and data type changes: DirectQuery models support adding calculations and Power Query steps to convert data types. Click Database on the left, then click SQL Server Database in the list of available database sources on the right. The following screenshot highlights a group of events for a query. However I get "This table uses directquery and cannot be shown". Include a few more actions, to ensure that the events of interest flush into the trace file. https://www.gigxp.com/power-bi-import-vs-direct-query/, https://www.pbiusergroup.com/communities/community-home/digestviewer/viewthread?MessageKey=db1475c8-5c72-48b4-89c3-08d7b2bdaa0c&CommunityKey=b35c8468-2fd8-4e1a-8429-322c39fe7110&tab=digestviewer. Even for import mode, there's a similar problem of maintaining consistency when you import data from more than one table. Some of these limitations differ slightly depending on the exact source you use. Suggested Answer: C DirectQuery: No data is imported or copied into Power BI Desktop. Totals on table visuals: By default, tables and matrices display totals and subtotals. Attend online or watch the recordings of this Power BI specific conference, which includes 130+ sessions, 130+ speakers, product managers, MVPs, and experts. Click on " Switch all tables to Import mode ". To create a relationship between the tables, a single column is required, and in the Geography table, the column must contain unique values. For example, selecting a different value on a slicer requires sending a new set of queries to refresh all of the affected visuals. Open Power BI file. The trace file is in the Power BI Desktop folder for the current user, in a folder called AnalysisServicesWorkspaces. For more information, see max intermediate row set count. However, using DirectQuery is generally only feasible when the underlying data source can provide interactive queries (less than 5 seconds) for the typical aggregate query, and is able to handle the query load that will be generated. In Power BI Desktop or the Power BI service, you can connect to many different data sources in different ways. Adding new calculations, like calculated columns and measures. Hide the 'to' column on relationships. After a report is published, Refresh in the Power BI service refreshes the visuals in the report. These columns are based on an expression, like Quantity multiplied by UnitPrice. As long as the underlying source offers a suitable level of performance, you can use the same set of visualizations as for imported data. Databases like SQL Server, Access, and Amazon Redshift. The load depends on: When you open a report in the Power BI service, all the visuals on the currently visible page refresh. This pattern restricts using query statements that use Common Table Expressions (CTEs) and stored procedures. The ability to add custom columns in a direct query depends on the ability for the query to fold. To avoid this, try adding the custom column in power query instead (the query editor). Try to isolate any issues to one visual, rather than many visuals on a page. These folders are named with an integer suffix, such as AnalysisServicesWorkspace2058279583. When you connect to SAP BW, choosing DirectQuery allows this treatment of measures. Using DirectQuery means that opening or refreshing a report or dashboard always shows the latest data in the source. Some visuals might require more than one query. Launch PBD and navigate to File -> Options and Settings -> Preview features. Changes that provide more flexibility when using imported data let you import more often, and eliminate some of the drawbacks of using DirectQuery. For more information about Power BI Premium capacity resource limitations, see Deploying and Managing Power BI Premium Capacities. Limitations in calculated columns: Calculated columns can only be intra-row, that is they can refer only to values of other columns of the same table, without using any aggregate functions. At least initially, limit measures to simple aggregates. When this column is used to filter or group in a visual, Power BI will generate a query that does not need to join the Sales and Product tables. This use of subqueries doesn't affect performance for the data sources DirectQuery supports. Is there some other way to see data, including my custom column? The different Power BI data connectivity options. They will allow configuring more efficient model relationships that expect matched values on both sides of relationships. But if the underlying source schema changes, the Power BI service doesn't automatically update the available fields list. Limit the number of visuals on a page: When you open a page or change a page level slicer or filter, all the visuals on the page refresh. Also, the Get Data dialog or Power Query Editor use subselects within the queries they generate and send to retrieve data for a visual. So, as the number of page visuals increases, there is higher chance that they will be refreshed in a serial manner. Connecting with DirectQuery can be useful in the following scenarios. Unless these interactions are necessary, it's recommended they be switched off if the time taken to respond to users' selections would be unreasonably long. However, the limit can occur in cases where Power BI doesn't fully optimize the queries sent, and requests some intermediate result that exceeds the limit. For some DirectQuery sources, this trace file includes all queries sent to the underlying data source. Open SQL Server Profiler, and select File > Open > Trace File. When you open a dashboard, the tiles reflect the data at the time of the last refresh, not necessarily the latest changes made to the underlying source. If the performance issues don't occur in Power BI Desktop, you can investigate the specifics of the report in the Power BI service. Rather than generate an expression that the relationship uses, it generates a multi-column SQL join predicate. For more information about DirectQuery, check out the following resources: More info about Internet Explorer and Microsoft Edge, DirectQuery in SQL Server 2016 Analysis Services, Power BI modeling guidance for Power Platform, SQL Server Index Architecture and Design Guide, Get started with Columnstore for real-time operational analytics, Guidance for designing distributed tables in Azure Synapse Analytics (formerly SQL Data Warehouse), Assume referential integrity settings in Power BI Desktop, Relationships with a many-many cardinality in Power BI Desktop, Deploying and Managing Power BI Premium Capacities, How visuals cross-filter each other in a Power BI report, DirectQuery model troubleshooting in Power BI Desktop, The first query will retrieve the categories meeting the condition (Sales > $15 million), The second query will then retrieve the necessary data for the visual, adding the categories that met the condition to the WHERE clause. Although the user can select the next item before the query completes, this approach results in extra load on the underlying source. Increasing Maximum connections per data source allows sending more queries, up to the maximum number specified, to the underlying data source. Publishing the report to the Power BI service creates and uploads a dataset, the same as for import. Table 6 and Fig. To guarantee this consistency would require the overhead of refreshing all visuals whenever any visual refreshed, along with using costly features like snapshot isolation in the underlying data source. The DirectQuery table is correctly folded (check bothValue.Metadata and the native query). Also, the allowed DAX scalar functions, such as LEFT(), are limited to those functions that can be pushed to the underlying source. DirectQuery-enabled sources are primarily sources that can deliver good interactive query performance. Power BI import and DirectQuery capabilities evolve over time. Multiple DAX queries can run in parallel, so events from different groups can interleave. Power BI connects to a large number of varied data sources, such as: You can import data from these sources into Power BI. Applying the same filter to a table twice, through one of more tables outside of the DirectQuery source, is not supported. One or more pairs of DirectQuery Begin and DirectQuery End events, which represent queries sent to the underlying data source as part of evaluating the DAX query. The table below lists the upper limits of the active connections per data source for each Power BI environment. The examples in the paper are for SQL Server Analysis Services, but the fundamental points also apply to Power BI. You can preview a representation of the actual SQL query statement for a Power Query applied step, by selecting the View Native Query option.