What are VLDB properties in MicroStrategy? 39. Single Sign-On (SSO) allows for one-time login for both MicroStrategy and Snowflake. MicroStrategy supports reporting and analysis with SAP BW, Microsoft Analysis Services, Hyperion Essbase,. Default VLDB properties are set according to the database type specified in the database instance. This feature is similar to what we see in. ) Microstrategy Desktop. It also displays all current settings for each VLDB property. x and later). MicroStrategy uses a user editable XML file to control what VLDB properties are visible in the different GUI parts of MicroStrategy client products. You can configure properties such as SQL join types, SQL inserts, table creation, Cartesian join evaluation, check for null values, and so on. To modify the String Comparison Behavior VLDB property for an attribute. Explain how you can optimize a report in Microstrategy? VLDB properties enable you to customize the SQL that Microstrategy produces, and determine how data is processed by the Analytical. This article describes how the "Set Operator Optimization" VLDB property works in MicroStrategy Introduction to VLDB Properties Optimizing processing with VLDB properties. There is a method to change the default syntax for table and column names while generating MicroStrategy SQL during report execution in MicroStrategy by using VLDB properties. Project-Level VLDB settings: Click to configure the analytical engine settings. Find 513 houses for sale in Victoria, BC. You can choose to have the report display or hide the information described above, by selecting. Possible locations for VLDB optimizations in the query structure are. From the Tools menu, select Set all values to default. Below are the new features exclusive to. Relationship Tables 4. Both properties are located in the Query Optimizations folder in the VLDB property editor. 195 Managing joins in a non-uniform hierarchy. The setting is applied. It has the following five options:What are VLDB properties? VLDB stands for Verly Large Data Base Properties. The Project-Level Very Large Database (VLDB) Property setting, found in Joins > Preserve All Lookup Table Elements, 'Preserve lookup table elements joined to final pass result table based on template attributes with filter' is not turned on, which results in the filters being ignored. The 'Group By ID Attribute' VLDB property is not applied in a MicroStrategy Desktop 8. The Data population for Intelligent Cubes VLDB property allows you to define if and how Intelligent Cube data is normalized to save memory resources. The attribute uses a CASE statement to replace NULL values with -999. VLDB Properties Editor. Accessing Report VLDB Properties. Why MicroStrategy Why MicroStrategy; Customer Stories; Platform Products; MicroStrategy ONE; AI & Augmented; Dossier; Library; Workstation; HyperIntelligence; Multi-Cloud; Embedded Analytics; Innovations; Futures. Launch Project Configuration, select "SQL Data warehouses" under "Database instances" tab. 3) Explain how intelligent cubes are different from ordinary cubes?. The MDX cube report is executed. VLDB_PROPERTY_NAME: The name of the property, returned as a string. Select the desired Property Value and repeat for other properties. CAUSE: "SQL Global Optimization" under Query Optimizations is a hidden option that need to be made visible selecting "Show Advance Settings" under the menu option Tools in the VLDB. In the lower-right. x introduces a third option to the VLDB Property "Drop Temp Table Method. You can determine the default options for each VLDB property for a database by performing the steps below. Parallel Query Execution is an advanced property that is hidden by default. txt) or read online for free. Additionally, the COALESCE function can be included in the SQL query. " Save and close. •The filter on [MONTH_ID] is applied to the lookup table because the VLDB property dictates so. This feature provides the ability to create multiple query queues and queries are routed to an appropriate queue at runtime based on their user group or query group. Contact MicroStrategy. The Parallel Query Execution property determines whether MicroStrategy attempts to execute multiple queries in parallel to. Any projects that existed prior to upgrading metadata to MicroStrategy 2020 retain their original VLDB property settings. 0, a VLDB property is available to control. These properties govern the working of the Analytical and SQL Engine, which have a significant influence on the. Visit REALTOR. 3. See the warning above if you are unsure about whether to set properties to the default. You can configure properties. The VLDB properties at the different levels work together to affect report results; however, there is a different interface for each level. Click the "VLDB Properties. Then select MDX metric values are formatted by column (default) or MDX metric values are formatted per cell. VLDB Settings These settings can be changed in the VLDB Properties dialog box for either reports or the database instance. These properties govern the working of the Analytical and SQL Engine, which have a significant influence on the business reports. VLDB_PROPERTY_GROUP_NAME: The group name associated with the project, returned as a string. The Database instances - SQL Data warehouses pane displays. col1, s1. For this reason, two additional options are provided:Export to PDF: export a report or document to a PDF document: EXPORTTOPDF:. •. Enable parallel query execution for multiple data source reports only : MicroStrategy attempts to execute multiple queries in parallel for MicroStrategy reports and. x, select 'Project Documentation' from the Tools menu to start the wizard. This article covers the purpose of the where clause driving table property. List all parent groups of a user group 'sGroup'. In MicroStrategy Developer 9. The properties are saved in different folders, as indicated in the previous list. x report for a specific attribute using an ApplySimple statement as one of its forms. In the latter case, intermediate tables would be left on the database; administrators could remove them using a database-side scheduled task. You will study concepts such as level metrics, transformation. VLDB properties allow you to customize the SQL that MicroStrategy generates, and determine how data is processed by the Analytical Engine. This VLDB property has the following options: Disable parallel query execution (default) : All queries for MicroStrategy reports and Intelligent Cubes are processed sequentially. In some cases the drill, unrestricted, could. A few common one are for Attribute or Metric join types, cross join check, type of intermediate table, etc. You can connect to multiple projects on. 5. 1 and 10. 2. MicroStrategy Library. Any projects that existed prior to upgrading metadata to. This controls whether the MDX function TopCount is used in place of Rank and Order to support features such as metric qualifications. There are number of them. Changes made to this VLDB setting can cause differences to appear in your data output. This VLDB property is useful only for MDX cube reports that access an Oracle Hyperion Essbase MDX cube source. For reports with several relationship filters, temporary table syntax may execute. MicroStrategy supports reporting and analysis with SAP BW, Microsoft Analysis Services, Hyperion Essbase,. . Please right-click a project>Project Configuration>Database Instances>VLDB Properties (for the appropriate database instance) to access the VLDB properties. col1, s1. VLDB properties are usually determined by an administrator, but some may also be defined by a project’s designer. x. Only project configured with those setting is applicable for the case in this article. x, with the Intelligence Server running on Linux, the image in the exported PDF report appears as a red "X". However, there is no governing for in-memory executions, including data blending which creates unnecessary risk to the stability and performance of the. The algorithm that calculates the table sizes performs the following steps: Calculate the number of levels per hierarchy: Hierarchy 1: 3. Some queries may benefit from distributing data by the fact columns as well as the attribute ID columns. This article covers the Constant Column Mode VLDB property and its options and function in MicroStrategy. These properties apply only to MDX cube reports using data from an MDX cube. MicroStrategy specifies a default value for each database platform that will generate appropriate SQL for the database. When a Database Instance is configured to use the “Azure SQL Data Warehouse” database connection type, the recommended values for all VLDB properties will automatically be. When exporting a report containing an image attribute form (using an ApplySimple statement) to PDF in MicroStrategy Web 9. See Viewing and Changing Advanced VLDB Properties for more information on how to display this property. 1 and 10. Join common key on both sides. For example, your report contains Store and Sum (Sales), and it is possible that a store does not have any sales at all. To Configure a Report for Bulk Export. In MicroStrategy SQL Generation Engine, the VLDB property "Preserve all final pass result elements" is designed for the case in which data elements exist in a fact table that are missing from an attribute's lookup table. Victoria's peaceful atmosphere and vibrant real estate market make it a great place to search for your next home. This property is called 'MDX TopCount Support' and is available at the report level and database instance level. This information is available for each property in the VLDB Properties dialog box at each level. For more information about all the VLDB properties, see SQL Generation and Data Processing: VLDB Properties. Check the report SQL again, observe that "with" clause (aka common table expression) is applied. See the warning above if you are unsure about whether to set properties to the default. Open the report template in the Template Editor. a. For instructions on how to display this property, see Viewing and Changing Advanced VLDB Properties. For this scenario, you can use these two VLDB properties to define which MicroStrategy data types support the character sets of your Teradata database. This allows SQL to be run after the report execution, and is not tied to the subscription. To begin, the architecture for dashboard execution is. - On MicroStrategy Developer main toolbar, cick on ToolsProject Documentation - Follow the wizard selecting: (1) Application Objects (2) Advanced DefinitionIt is found in the Analytical Engine folder of the VLDB Properties (Metric) dialog box, pictured below. MicroStrategy Library Mobile iOS. MicroStrategy Office privileges. Close suggestions Search Search. MicroStrategy online help and PDF manuals (available both online and in printed format) use standards to help you identify. 4. 15. VLDB Editor for Select Statement Post String (ORDER BY PO_APPROVED_DATE_DESC) Drill from Summary Report to Report Template which includes SQL Hint (TOP 25) and new Select Statement Post String SQL that is Generated Keep in mind that these VLDB properties are introducing custom SQL to filter out the data with out the MicroStrategy Engines knowledge. VLDB (Very Large DataBase) properties allow you to customize the SQL that MicroStrategy generates. One of the options under Analytical Engine folder is called "Metric Level Determination. For information on VLDB properties, including steps to access and modify them for various MicroStrategy objects, see the System Administration Guide: If you define the Null checking for Analytical Engine property as True, NULL values are treated as zero values in the rank calculation. Use the temp table prefix in the (Very Large Database) VLDB properties window. 6 :Change the VLDB property 'Subtotals over consolidations compatibility ' from the default to: Evaluate subtotals over consolidation elements only (behavior for 7. b. The setting will NOT force the MicroStrategy Engine to include the [LU_ITEM] table. Among all , Report has highest priority and It always override the others . Certain VLDB properties use different default settings depending on which data source you are using. Choose the database instance and then open VLDB Properties. On the Advanced tab, select the Use parameterized queries check box. (For information on object. The setting will NOT force the MicroStrategy Engine to include the [LU_ITEM] table. " Save and close. Choose one of the following: •. The VLDB Properties Editor opens. Web Analyst privileges. VLDB_PROPERTY_GROUP_NAME: The group name associated with the project, returned as a string. NOTE: For information regarding the hierarchy of the different MicroStrategy VLDB settings, refer to the following MicroStrategy Knowledge Base. •. Under Categories, expand Calculations, and select Attribute Join Type. MicroStrategy specifies a default value for each database platform that will generate appropriate SQL for the database. Dimensionality Model is an advanced property that is hidden by default. The MicroStrategy Tutorial project uses aggregate tables by default. What ensures that object definitions are kept consistent and accurate across all environments when objects are migrated from a testing environment to a production environment You answered: Migration manager Incorrect Correct. Parallel Query Execution. The VLDB property's behavior will be demonstrated using the following attribute and report. Join common attributes (reduced) on both sides. In. For more information regarding post statements defined at the report level, refer to the following Technical Note:There is one VLDB property in MicroStrategy that controls the join behavior between different datasets. For example, if a VLDB property is set one way for a report and the same property is set differently for the database instance, the report setting takes precedence. (The original name for this property, in fact, was "Incomplete lookup table. Property. Go to Metrics > NULL Check. Access the VLDB Properties Editor. The metric join type, described in the previous section, is not the only VLDB property that affects metrics. Below are the list of parameters that the URL must. Other VLDB settings that affect query generation The MicroStrategy platform provides VLDB settings for all supported RDBMS platforms to generate optimized SQL that takes advantage of database-specific functionality. The reports created from an intelligent cube do not have this VLDB property used in normal reports. Read/write-optimized tree indexing for solid-state drives. In the VLDB Editor open the 'Tables' folder and click on 'Intermediate Table Type. You can configure this setting. When VLDB settings are configured at the report level to allow for an outer join to the lookup table in MicroStrategy Developer, the SQL does not show an outer join. But the grid is not reset properly when adding and removing a derived element. There is a method to change the default syntax for table and column names while generating MicroStrategy SQL during report execution in MicroStrategy by using VLDB properties. Use this section to learn about the VLDB properties before modifying any default settings. Then go to the key “Query Optimization” > “Data Population for Intelligent Cubes” and choose the optimal option. 1 and 10. x order - Calculate. Fact Tables 2. Choose Tools > VLDB Properties. The VLDB Properties (Report) dialog box opens. The Character Column Option and National Character Column Option VLDB properties can also support the scenario where two character sets are used, and Unicode is not one of these character sets. select a11. This is reflected in the checkbox “Use default inherited value for all VLDB properties”. There are a number of them. The "Evaluation Ordering" VLDB setting affects the order in which the Analytical Engine will perform various calculations. The default syntax can be modified by using 'Column Pattern' VLDB property. These values are set by default when the "Oracle 11g" database object is used (set at Configuration Managers > Database Instances > Database Instance > Database connection Type ). select a11. To the right of the Database connection area, click Modify. In Web: Click the MicroStrategy > Preferences. Impact: Authentication Motivation: One-time login Details: MicroStrategy currently support SSO with Azure AD. " button under the warehouse name, as shown below: Open the "Metrics" folder and select "Metric Join type. By default, all properties are governed by the one at the top level. 4. To use automatic attribute role recognition, you must select the Engine Attribute Role Options, found in the database instance-level VLDB Properties under Query Optimization. x, with the Intelligence Server running on Linux, the image in the exported PDF report appears as a red "X". The Database Instances Editor opens. 3. Set the additional final pass property to force an additional pass of SQL. This information is available for each property in the VLDB Properties dialog box at each level. Sometimes pre-statement VLDB Properties are used to set database priority. However, you want to show all the store. 5. The options for this. Allows the MicroStrategy SQL Engine to use a new algorithm for evaluating whether or not a Cartesian join is necessary. Click VLDB Properties. You can determine the default options for each VLDB property for a database by performing the steps below. For more information about all the VLDB properties, see SQL Generation and Data Processing: VLDB Properties. When an Intelligent Cube is published, the description information for the attributes (all data mapped to non-ID attribute forms) included on the Intelligent Cube is repeated for every row. If a table has been imported from only one database instance, the secondary database instance panel will be empty and disabled. VLDB. In addition, this release introduces new features across the analytics, mobility, and security platforms—making it easier for users to build applications faster. A common request is to set a higher priority for element browsing requests only, because they are generally very simple queries, and slow execution directly impacts the user's perception of the project's responsiveness by delaying the appearance of prompts. However, this could produce inflated subtotal or dynamic. Database Instance Level This is the most common place to set VLDB Properties. Select the radio button labeled "Outer Join. The recommended VLDB optimizations for Oracle 11g are listed below. The properties are saved in different folders, as indicated in the previous list. VLDB_PROPERTY_VALUE: The value of the property, returned as a string. Check the report SQL, and observe that permanent tables are still used as intermediate tables. LIST VLDBSETTINGS GROUP VLDB_PROPERTY_GROUP: A ResultSet containing a list of properties associated with a group. See the MicroStrategy Developer Help (formerly the MicroStrategy Desktop Help) or the System Administration Help for steps to set this VLDB property. For examples and details to enable these properties, see SQL Generation and Data Processing: VLDB Properties. col2…) While the default values should result in the. Open MicroStrategy Developer. You're in the right place for real estate! 464 homes for sale in Victoria, BC are available on Point2. Choose Data > Configure Bulk Export. From the Tools menu, select Grouping. These properties apply only to MDX cube reports using data from an MDX cube. This is Microstartegy way of handling database specific preferences while generating the report SQL. This setting is called Join Across Datasets. Since full outer joins can require a lot of database and Intelligence Server resources, and full outer joins are not supported for all databases, it. Metrics using count or average, metrics with dynamic aggregation. Specifying the Display Mode and VLDB Properties. These settings affect how MicroStrategy Intelligence Server manages joins, metric. Microstrategy VLDB Properties; MicroStrategy VLDB properties with Hive;. For information about accessing these properties, see. Follow the steps below to change the property. MicroStrategy has specific order in the from clause. In MicroStrategy Developer, open a report in the Report Editor. Select either Disable or Enable depending on whether you want to disable or enable. The Dimensionality Model property is strictly for backward compatibility with MicroStrategy 6. Why MicroStrategy Why MicroStrategy; Customer Stories; Platform14. This property is report-specific. Open the VLDB Properties Editor to display the VLDB properties for the level at which you want to work. In this course, you will study specific reporting scenarios and the MicroStrategy Engine’s techniques for composing the SQL queries that produce MicroStrategy reports. Global Optimization is a SQL Generation Engine feature that analyzes similarities and relationships between SQL passes, to reduce the number of passes where possible and improve report. To change the VLDB properties at any of the three levels, execute the following: Database Instance Level: Right-click on the Project name > Project Configuration. Dependent Object Options: Enable Find and Replace object dependencies: If the checkbox is selected, a user is allowed to find all dependent objects and replace them. Since these financial line item attributes include empty elements to support the hierarchical structure of the financial data, this causes some of the rows of the exported report to also be empty. This article describes what the evaluation ordering property is in MicroStrategy 9. From the Data menu, choose VLDB Properties. List Parent User Groups. MicroStrategy implements a list of strategies through VLDB settings to generate temp table for the efficient execution of complex business queries. In the VLDB Properties dialog go to the menu: Tools > Show Advanced Settings. On the Advanced tab, select the Use parameterized queries check box. This property determines how values for metrics are calculated when unrelated attributes from different datasets of a dossier or document are included with metrics. VLDB properties are available at multiple levels so that SQL generated for one report can be manipulated separately from the SQL generated for another similar report. In MicroStrategy Developer, log into the Server Project Source as a user with administrative privileges. There is NO difference between the 'Preserve lookup table elements' options under the VLDB Properties editor vs. The user should locate the last <Setting> XML entry in the file similar to the following entries:<Setting>The table b elow summarizes the MultiDimensional Expression (MDX) related VLDB properties. Database Instance. Viewing and Changing VLDB Properties. VLDB properties allow you to customize the SQL that MicroStrategy generates, and determine how data is processed by the Analytical Engine. The Character Column Option and National Character Column Option VLDB properties can also support the scenario where two character sets are used, and Unicode is not one of these character sets. 1, it is possible to identify specific attributes as having an incomplete lookup table by setting the “Preserve all final pass result elements” VLDB property within the attribute. Upgrading Your Database Type Properties. This property is found in the Select/Insert folder of the VLDB property editor: This property has four options: Group by expression. the Report Data Options. You can change VLDB properties to alter the syntax of a SQL statement and take advantage of database-specific optimizations. For complete details about all VLDB properties, see SQL Generation and Data Processing: VLDB Properties. For a project, right-click it and choose Advanced Properties. It is strongly encouraged that you post your questions on the community forum for any community based. MicroStrategy periodically updates the default settings as database vendors add new. If you have selected multiple reports, including bulk export reports, and choose the Run Report option from the right-click menu, all the bulk export reports are filtered out and are opened in the Report Editor; the other reports. Preview Feature: A new data. 0. In the bottom left corner, click on the button "Generate Connection File". Micro Strategy Interview Questions and Answers - Free download as PDF File (. Modifying any VLDB property should be performed with caution only after understanding the effects of the VLDB settings that you want to apply. When exporting a report containing an image attribute form (using an ApplySimple statement) to PDF in MicroStrategy Web 9. The property "RowGoverning4CostlyFunctions" is a hidden limit that was introduced in MicroStrategy to prevent memory issues or crashes when many complex metrics are used at the same time. Right-click a database instance and select Edit. This VLDB property becomes obsolete when you change your Data Engine version to 2021 or above. When exporting a report containing an image attribute form (using an ApplySimple statement) to PDF in MicroStrategy Web 9. Throughout the course, students gain hands-on practice via a series of exercises. Possible Values Default Values; Metrics Join Across Datasets: Determines how values for metrics are calculated when unrelated attributes, from different datasets of a dossier or document, are included with metrics. When exporting a report containing an image attribute form (using an ApplySimple statement) to PDF in MicroStrategy Web 9. The following settings are advanced properties which are. (0 = time limit not enforced by this governing setting)The MicroStrategy Engine Essentials course explains the inner workings of the MicroStrategy Engine. For example, ApplySimple("#0 * #1",[col1],[col2])indicates that two items, col1 and col2, referenced as. The Database Connections dialog box opens. Community & Support Search Discussions Open A Case View My Cases1. The 'Create Individual Index' VLDB setting was introduced in MicroStrategy 8. VLDB properties allow you to customize the SQL that MicroStrategy generates, and determine how data is processed by the Analytical Engine. KB441418: Supplemental reference for installing Hotfix on MicroStrategy version 10. VLDB Properties, available to users with Developer privileges, opens the VLDB Properties (Report) dialog box, which allows you to apply VLDB properties to the report's SQL. Some queries may benefit from distributing data by the fact columns as well as the attribute ID columns. ; By default, the Bulk export database instance, which is the database instance for the database containing the report data, is defined as the data warehouse for the project. Other VLDB Properties are mentioned below. 192 Determining the level to apply a VLDB property. Since MicroStrategy Analytical Engine 9. The maximum file size of dashboard (. KB40199: "The tokens 'NTLINK' and 'IMPORTWINUSER' should not be used. When exporting a report containing an image attribute form (using an ApplySimple statement) to PDF in MicroStrategy Web 9. Beginning with MicroStrategy 9. The display format for dates does not change even after changing the SQL Date format and Date Pattern settings under VLDB properties of the project in MicroStrategy Developer. wanttobuildandresellMicroStrategy-basedproductsorapplicationssuitedto particularindustries. Under the VLDB properties for the report, change the Additional Final Pass Option setting to One. The MicroStrategy platform provides VLDB drivers for all supported data warehouse platforms to generate optimized SQL that takes advantage of database specific functionality. Project. In MicroStrategy Developer versions prior to 9. Normally, MicroStrategy SQL Generation Engine attempts to combine metric calculations and attribute lookups into one pass of SQL. The following list summarizes the metric-specific VLDB properties that can be set at the metric level. For a data source, right-click it and choose Edit. For a full list of product privileges, see Privileges by License Type. For instructions on how to display this property, see Viewing and Changing Advanced VLDB Properties. You can use MicroStrategy for different types of data analysis on a variety of data warehouse implementations. Dimensionality Model. In the VLDB Properties, locate option "Distinct/Group by Option (when no aggregation and not table key)" under Select/Insert tab. Determines whether MicroStrategy attempts to execute multiple queries in parallel to return report results faster and publish Intelligent Cubes. If you choose Temp Table Join. PDS file. Open navigation menu. 39 Intermediate Table Type VLDB property. 3. The VLDB property ‘Analytical Engine > ‘Filtering on String Values’ determines whether filters consider trailing spaces in attribute elements when filtering data in MicroStrategy. You will study concepts such as level metrics, transformation. x. In MicroStrategy 10. Integer Constant in Metric; Metric Join Type; Null Check; Zero CheckThis manual runs through VLDB Properties, Internationalization, User Privileges, and Other Supplemental Information for Administrators. The most basic DBMS (database) level where properties are defined. This section focuses on the VLDB properties that are set at the metric and report level. MicroStrategy SQL Generation Engine 9. In MicroStrategy Developer, from the File menu, point to New, and select Transformation. 1, this can be done at the report level by following the steps in technical note 10073. You can change VLDB properties to alter the syntax of a SQL statement and take advantage of database-specific optimizations. Use VLDB property editor: use the VLDB Properties Editor: USEVLDBEDITOR: View ETL information:. The following settings are advanced properties which are. When selected, the options and SQL, if applicable, appear in the right side of the dialog box. This setting is used as an optimization for some databases which perform better when columns coming. x order - Calculate derived metrics/smart compound metric before derived elements/consolidation and all subtotals are smart" and "7. For more details, go to Start -> Programs -> MicroStrategy -> Product Manuals -> Advanced Reporting Guide (PDF) -> 13. Then in the cube editor, go to the menu: Data > VLDB Properties to open the VLDB Properties window. Open the database instance for the project. MicroStrategy Engine Components 27 MicroStrategy supported database platforms 276 MovingAverage function 255 Multipass SQL 37 N Nested Metrics 160 Non-Aggregatable metrics 142 O Oracle 292, 299, 304, 318, 327, 328, 329 Output level 193 P Partitioning 330 Permanent table 330 Permanent Tables 326 Pre/Post Statements 299 wildcards 301. The Display mode setting determines how the drilled-to report is displayed, as one of the following options: Default: Uses the original report's display setting. The final pass will perform two operations. This setting is useful if you have only a few attributes that require different join types. The 'Where clause driving table' Very Large Database (VLDB) property indicates to the MicroStrategy Engine which table to use when a filter needs to be applied. for more information on this setting. The Results Set Row Limit VLDB property is used to limit the number of rows returned from the final results set SELECT statements issued. " The default value here is "Include only lowest-level attribute in metric level (recommended for version 9. You can configure this setting. LIST VLDBSETTINGS GROUP VLDB_PROPERTY_GROUP: A ResultSet containing a list of properties associated with a group. To view a summary of the system components that contain VLDB properties for a given report, select one of the system-level folders displayed under the VLDB Settings. To create a last year transformation based on an expression.