In the preview features, put a check on DirectQuery for Power BI datasets and Analysis Services. There's also a limit on the size of the trace file. A Composite model can integrate more than one DirectQuery source, and it can also include aggregations. After a report is published, Refresh in the Power BI service refreshes the visuals in the report. Please advise. This page has three helpful options. I have used the same queries previously and it was all good. Power BI doesn't natively support a uniqueidentifier datatype. Create the appropriate indexes. These transformations are more limited in DirectQuery. Then, if the measures are sufficiently responsive, you can experiment with more complex measures, but paying attention to the performance for each. For SQL Server, Azure SQL Database or Azure Synapse Analytics (formerly SQL Data Warehouse) sources, see SQL Server Index Architecture and Design Guide for helpful information on index design guidance. Functions that aren't supported aren't listed in autocomplete when authoring the DAX query for a calculated column, and result in an error if used. Navigate to or enter the path to the trace file for the current Power BI session, such as \AppData\Local\Microsoft\Power BI Desktop\AnalysisServicesWorkspaces\AnalysisServicesWorkspace2058279583\Data, and open FlightRecorderCurrent.trc. It will ensure every Sales product key value has a corresponding row in the Product table. The Assume referential integrity setting on relationships enables queries to use INNER JOIN rather than OUTER JOIN statements. The email address field is formatted as Email Address in the table. You can use calculated tables when you use DirectQuery with composite models. Power BI Import vs Direct Query: Everything You Need to Know To change the maximum number for the current file in Power BI Desktop, go to File > Options and Settings > Options, and select DirectQuery in the Current File section of the left pane. When you connect to SAP BW, choosing DirectQuery allows this treatment of measures. It will hold only their metadata. Again, this approach commonly leads to poor performance. It's the period of human history we know the least about, but it's also the longest by far. DirectQuery for Power BI datasets and Azure Analysis Services (preview As you create or interact with a visualization, Power BI Desktop uses the imported data. You should import data into Power BI wherever possible. In addition to the above list of optimization techniques, each of the following reporting capabilities can contribute to performance issues: Measure filters: Visuals containing measures (or aggregates of columns) can have filters applied to those measures. The Power BI Desktop\Traces folder opens. No data is imported, and the underlying data source is queried to refresh visuals. As no data is stored in the model any data needed for visualizations will be retrieved from the data source directly. Gateway performance For information about troubleshooting gateway performance, see Troubleshoot gateways - Power BI. 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. This step results in a query that is not supported in directquery mode Each query returns all the model table columns, even though the visual references only four columns. This article applies to DirectQuery models hosted in the Power BI service or Power BI Report Server. Much of the content, however, is still applicable to Power BI DirectQuery models. Upon load, no data is imported into the Power BI store. Direct Query Mode in Power BI for Azure Analysis Services - SQL Shack This folder disappears when the associated Power BI Desktop session ends. It's possible to disable cross-highlighting and cross-filtering by default, though it can be overridden by editing interactions. Visual totals: By default, tables and matrices display totals and subtotals. If both tables have no same columns, you may also find useful this approach: let Source = Sql.Database ("server\database", "Mclaren"), dbo_Capability = Table.Join ( Source { [Schema="dbo",Item="Information_Group"]} [Data], {"Capability"}, Source { [Schema="dbo",Item="Capability"]} [Data], {"ID"}, JoinKind.LeftOuter ) in dbo_Capability You can't use these statements in subqueries. There is one exception to this guidance, and it concerns the use of the COMBINEVALUES DAX function. Set relationships to enforce integrity: The Assume Referential Integrity property of DirectQuery relationships determines whether Power BI will generate source queries using an inner join rather than an outer join. Using DirectQuery has some potentially negative implications. You may need to restart Power BI Desktop for the change to take effect. That feature shares many details with Direct Query in Power BI, but there are also important differences. Please take a look at these link for reference. The article also describes how to get detailed information to help you optimize reports. The to column on relationships is commonly the primary key on the to table. For more information, see Assume referential integrity settings in Power BI Desktop. If the column has meaning, introduce a calculated column that's visible and that has a simple expression of being equal to the primary key, for example: Examine all calculated columns and data type changes. You should switch off this interaction if the time taken to respond to users' selections is unreasonably long. Along with the performance of the underlying source, the load placed on the source also impacts performance. For more information, see Performance diagnostics. DirectQuery in Power BI offers the greatest benefits in the following scenarios: You can refresh models with imported data at most once per hour, more frequently with Power BI Pro or Power BI Premium subscriptions. Sales data from an enterprise data warehouse. DirectQuery is feasible only when the underlying data source can provide interactive query results in less than five seconds for a typical aggregate query, and can handle the generated query load. The way to do this is: Open a new Power BI Desktop Application. It can be helpful for them to understand the general data architecture, including any relevant limitations described in this article. Add indexes: Define appropriate indexeson tables or viewsto support the efficient retrieval of data for the expected report visual filtering and grouping. It's free to sign up and bid on jobs. This type of filter translates to an inefficient native query, as follows: A better design approach is to include relative time columns in the date table. is pushed 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. Every user sees the same data, unless row-level security is defined as part of the report. If you can't meet your goals by importing data, for example if the data changes frequently and reports must reflect the latest data, consider using DirectQuery. The relational database source can be optimized in several ways, as described in the following bulleted list. Immediately after you publish a DirectQuery report, you must configure the credentials of the user to use. When you import data, Power BI connects to the data source by using the current user's Power BI Desktop credentials, or the credentials configured for scheduled refresh from the Power BI service. The underlying source defines and applies security rules. Navigate to the parent folder and then to the AnalysisServicesWorkspaces folder, which contains one workspace folder for every open instance of Power BI Desktop. Connecting to Power BI datasets and Analysis Services in DirectQuery mode always uses SSO, so the security is similar to live connections to Analysis Services. The setting is enabled only when there's at least one DirectQuery source in the current report. We recommend that you educate your report consumers about your reports that are based on DirectQuery datasets. By applying filters early, it generally makes those intermediate queries less costly and faster. To create a relationship between the tables, a single column is required, and in the Geography table, the column must contain unique values. If the data is very large, it's not feasible to import all of it. When you publish SQL Server Analysis Services reports that use live connections, the behavior in the Power BI service is similar to DirectQuery reports in the following ways: Opening an existing report or authoring a new report in the Power BI service queries the underlying SQL Server Analysis Services source, possibly requiring an on-premises data gateway. When the source data lacks integrity, it's recommended that an "unknown" dimension record is added to effectively repair the data. Materialize a date table: A common modeling requirement involves adding a date table to support time-based filtering. For information about troubleshooting gateway performance, see Troubleshoot gateways - Power BI. The subfolder names have integer suffixes, such as AnalysisServicesWorkspace2058279583. In the Power BI Desktop ribbon, click the small triangle at the bottom of the Get Data button. How to diagnose DirectQuery performance issues. Any transformations must be applied on every query to the underlying source, rather than once on data refresh. Rather than generate an expression that the relationship uses, it generates a multi-column SQL join predicate. You must refresh in Power BI Desktop to reflect schema changes. These details relate to using Power BI alone. Power BI will translate its internal queries into queries that get send to the underlying data sources . For multidimensional sources like SAP BW, you can't switch from DirectQuery to import mode either, because of the different treatment of external measures. The following columns are also of interest: To capture a trace to help diagnose a potential performance issue: Open a single Power BI Desktop session, to avoid the confusion of multiple workspace folders. If you can identify a single sluggish visual on a page in Power BI Desktop, you can use Performance Analyzer to determine what queries Power BI Desktop sends to the underlying source. To ensure that opening a dashboard is fast, the tiles automatically refresh on a schedule, for example every hour. The following Power BI reporting capabilities can cause performance issues in DirectQuery-based reports: Measure filters: Visuals that use measures or aggregates of columns can contain filters in those measures. DAX Studio, VertiPaq analyzer, chained datasets, composite models, DirectQuery, query folding, dynamic RLS. Visuals don't reflect changes to the underlying data in the data store. Darius D. - Fort Lauderdale, Florida, United States - LinkedIn For more information about bidirectional cross filtering, see Enable bidirectional cross-filtering for DirectQuery in Power BI Desktop, or download the Bidirectional cross-filtering white paper. When you use multiple data sources, it's important to understand the security implications of how data moves back and forth between the underlying data sources. Performance issues are often based on the performance of the underlying source. I have been following the same steps and it has always worked fine. This guidance generally improves query performance, although it depends on the specifics of the data source. A DirectQuery model can be optimized in many ways, as described in the following bulleted list. However I get "This table uses directquery and cannot be shown". Apply filters first: When first designing reports, we recommend that you apply any applicable filtersat report, page, or visual levelbefore mapping fields to the visual fields. this table uses directquery and cannot be shown Ensure data integrity is complete: It is especially important that dimension-type tables contain a column of unique values (dimension key) that maps to the fact-type table(s). Whilst the user can select the next item prior to the query completing, it results in extra load on the underlying source. Suggested Answer: C DirectQuery: No data is imported or copied into Power BI Desktop. Allowing multi-selection in filters can cause performance issues. Also, the allowed DAX scalar functions, such as LEFT(), are limited to those functions that can be pushed to the underlying source. Power BI Desktop resends the necessary queries for each visual, and updates the visual as necessary. 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. Solved: Re: Dynamic RLS using Dataverse tables works until Please mark my reply as solution. Although the results might be the same depending on the actual data, the performance might be drastically different because of indexes. A higher limit results in more load on the underlying source, so the setting isn't guaranteed to improve overall performance. 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. If using Excel is important for your scenarios, account for this issue in deciding whether to use DirectQuery. A filter that is applied from a data source to a table from another DirectQuery source can only be set on a single column. Table 6 and Fig. It controls the number of queries concurrently sent to the data source. Every user interaction on the report might result in visuals being refreshed. For more information, see Use composite models in Power BI Desktop. Different visuals, whether on the same page or on different pages, might be refreshed at different times. Do the set of actions of interest in Power BI Desktop. TopN filters: Advanced filters can be defined to filter on only the top (or bottom) N values ranked by a measure. The general format of Power BI Desktop queries is to use subqueries for each model table the queries reference. Did I answer your question ? The number of users that share the report and dashboard. This data presents issues for solutions based on data import. If row-level security is defined, these caches aren't shared across users. The query issued to the SQL Server is like this: SELECT MAX ( [t0]. The value applies to all DirectQuery sources, and to any new DirectQuery sources added to that report. Additionally, the list of limitations that accompany use of DirectQuery should be considered carefully." This capability is supported for datasets that use DirectQuery, but performance is slower than creating visuals in Power BI. To open the trace file for the current session: During a Power BI Desktop session, select File > Options and settings > Options, and then select Diagnostics. You can switch a model from DirectQuery mode to import mode if you import all the necessary data. Click on " Switch all tables to Import mode ". Launch PBD and navigate to File -> Options and Settings -> Preview features. The load depends on: When you open a report in the Power BI service, all the visuals on the currently visible page refresh. Snowflake is slow with Power BI : r/dataengineering I can't give you an official answer (I work in Azure), but I will say that there is active work in fixing folding issues inPostgreSQL, wheather the current fixes make it into production, if they will help solve your issues, or when they will be released, I would have no idea. For example, in the service it's not possible to create any calculations, or use many analytical features, or refresh the metadata to reflect changes to the underlying schema. Group - is the dimension table that groups a set of users. In this article, I use December 2020 release. Also, failing to apply filters early can result in exceeding the 1 million-row limit, as described in About DirectQuery. 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. In particular, don't use the default contains filter if you need an exact match. However, large data might also make the performance of queries against that underlying source too slow. Click Database on the left, then click SQL Server Database in the list of available database sources on the right. In simple words, this means that you can combine DQ and Import mode within your data model, setting the preferred option for every single table! Performance Analyzer is a useful tool for identifying performance issues throughout the troubleshooting process. Avoid bidirectional cross filtering on relationships. 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. Connecting with DirectQuery can be useful in the following scenarios. Selections on the Query reduction screen let you show an Apply button for slicers or filter selections. Attend online or watch the recordings of this Power BI specific conference, which includes 130+ sessions, 130+ speakers, product managers, MVPs, and experts. The Get Data dialog will appear. Use DirectQuery in Power BI Desktop - Power BI | Microsoft Learn 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. The general format of Power BI Desktop queries uses subselects for each table they reference. This aggregation is fine for additive measures, such as Sum and Min, but can be an issue for non-additive measures, such as Average and DistinctCount. For example, querying for Median Country/Region Population might be reasonable, but Median Sales Price might not be reasonable. To easily get to the trace file folder in Power BI Desktop, select File > Options and settings > Options, and then select Diagnostics. Failing to apply filters early can result in hitting the one-million row limit. SQL Server Profiler displays all events from the current session. Query not supported in DirectQuery (PowerBI / PowerQuery) - Stack Overflow 01-26-2023 12:25 PM. If there's a Date table available in the underlying source, as is common in many data warehouses, you can use the Data Analysis Expressions (DAX) time-intelligence functions as usual. The Power BI Desktop Performance analyzer is a useful tool for identifying issues. If visuals take longer than 30 seconds to refresh, it's likely that further issues following report publication will make the solution unworkable. Like the measure filters, it will also result in two queries being sent to the underlying data source. A lot of the problem has to due with, while the query by itself might fold, the additional dax queries on top of it might not. There are many functional and performance enhancements that can be achieved by converting a DirectQuery model to a Composite model. DirectQuery: Tables are not cached in this instance, and any queries submitted to a Power BI dataset will use the query language for that particular data source to send data from the DirectQuery tables. A Composite model will consist of at least one DirectQuery source, and possibly more. Performance issues or query failures can arise if the cardinality is large because of the one-million row limit. The common workaround is to concatenate the columns by using a calculated column, and base the join on that column. They can achieve dramatic performance enhancements when visuals query higher-level aggregates. These filters can result in degraded performance for some data sources. But if the underlying source schema changes, the Power BI service doesn't automatically update the available fields list. Using Explore in Excel results in poor performance: You can explore a dataset by using the Explore in Excel capability, which lets you create pivot tables and pivot charts in Excel. This approach causes two queries to be sent to the underlying source: This approach generally works well if there are hundreds or thousands of categories, as in this example. This button lets you make several slicer and filter selections before you apply them. A filter can only touch a table once. Avoid relationships on calculated columns: Model relationships can only relate a single column in one table to a single column in a different table. With DirectQuery, the data remains in the underlying source location. So, as the number of page visuals increases, there is higher chance that they will be refreshed in a serial manner. Make a note of the location. The workspace folder is deleted when the associated Power BI Desktop session ends. The single query appears in the subselect of every query sent to that table. You can stream data directly into Power BI, although there are limits on the data volumes supported for this case. For example, you can filter to the rows where the date is in the last 14 days. Composite Model in Power BI; DirectQuery and Import Data Combined Importing takes advantage of the high-performance query engine of Power BI, and provides a highly interactive, fully featured experience. TopN filters: You can define advanced filters to filter on only the top or bottom N values ranked by some measure. Technically, it's possible to import exactly the aggregate data you need for each visual. Use Dataflow to setup a connection in PowerBI Service with OData ( https://yourcompany.operations.dynamics.com/data), and connect your PowerBI-file with the Dataflow from the PowerBI Dataflow-source in 'Get Data' on PowerBI Desktop. First, create an M parameter of type Decimal Number (called EnteredValueParam) in the Power Query Editor: Then create a dummy query (in this case called EnteredValues) with no rows and a single numeric column to bind the parameter to. This workaround is reasonable for imported data, but for DirectQuery it results in a join on an expression. Limitations and implications of using DirectQuery. The following screenshot highlights a group of events for a query. I'm running an employee KPI report for my company and i'm getting the data via "direct query" from our databse. To avoid this, try adding the custom column in power query instead (the query editor). For example, median country/region population might be reasonable, but median sales price might not be. You should use DirectQuery only for sources that can provide interactive query performance. Select tables in DirectQuery mode After selecting tables, click on Load. Power BI uses the query as provided, without an attempt to rewrite it. To ensure the filter is applied based on the date at the time the report runs, apply the date filter in the report. I have been following the same steps and it has always worked fine. When you connect to an online analytical processing (OLAP) source like SAP BW, you can't define any transformations, and the entire external model is taken from the source. If not, please upload some insensitive data samples and expected output. For example, selecting a different value on a slicer requires sending a new set of queries to refresh all of the affected visuals. Ownership . Multiple DAX queries can run in parallel, so events from different groups can interleave. Do not use Power Query relative date filtering: It's possible to define relative date filtering in a Power Query query. For more information about DirectQuery in Power BI, see: This article described aspects of DirectQuery that are common across all data sources. ELEC243-S23-PS1.pdf - ELEC 243 - Spring 23 Problem Set 1 You can switch off such totals by using the Format pane. This step results in a query that is not supported in directquery mode You can use the ActivityID value to determine which events belong to the same group. Using DirectQuery for datasets and Analysis Services (preview) - Power