Skip to main content

Optimizing queries in Microstrategy using VLDB properties

Optimizing queries in  Microstrategy using VLDB properties

#vldb #vldbproperties

The table below summarizes the Query Optimizations VLDB properties. Additional details about each property, including examples where necessary, are provided in the sections following the table.

Property Description Possible Values Default Value
Additional Final Pass Option
Determines whether the Engine calculates an aggregation function and a join in a single pass or in separate passes in the SQL.
• (default) Final pass CAN do aggregation and join lookup tables in one pass
• One additional final pass only to join lookup tables
Final pass CAN do aggregation and join lookup tables in one pass
Apply Filter Options
Indicates during which pass the report filter is applied.
• Apply filter only to passes touching warehouse tables
• Apply filter to passes touching warehouse tables and last join pass, if it does a downward join from the temp table level to the template level
• Apply filter to passes touching warehouse tables and last join pass
Apply filter only to passes touching warehouse tables
Attribute Element Number Count Method
Controls how the total number of rows are calculated for incremental fetch.
• Use Count(Attribute@ID) to calculate total element number (uses count distinct if necessary)
• Use ODBC cursor to calculate total element number
Use Count(Attribute@ID) to calculate total element number (uses count distinct if necessary)
For Tandem databases, the default is Use ODBC Cursor.
Count Distinct with Partitions
Determines how distinct counts of values are retrieved from partitioned tables.
• Do not select distinct elements for each partition
• Select distinct elements for each partition
Do not select distinct elements for each partition
Custom Group Banding Count Method
Helps optimize custom group banding when using the Count Banding method. You can choose to use the standard method that uses the Analytical Engine or database-specific syntax, or you can choose to use case statements or temp tables.
• Treat banding as normal calculation
• Use standard case statement syntax
• Insert band range to database and join with metric value
Treat banding as normal calculation
Custom Group Banding Points Method
Helps optimize custom group banding when using the Points Banding method. You can choose to use the standard method that uses the Analytical Engine or database-specific syntax, or you can choose to use case statements or temp tables.
• Treat banding as normal calculation
• Use standard case statement syntax
• Insert band range to database and join with metric value
Treat banding as normal calculation
Custom Group Banding Size Method
Helps optimize custom group banding when using the Size Banding method. You can choose to use the standard method that uses the Analytical Engine or database-specific syntax, or you can choose to use case statements or temp tables.
• Treat banding as normal calculation
• Use standard case statement syntax
• Insert band range to database and join with metric value
Treat banding as normal calculation
Data population for Intelligent Cubes
Defines if and how Intelligent Cube data is normalized to save memory resources.
• Do not normalize Intelligent Cube data
• Normalize Intelligent Cube data in Intelligence Server
• Normalize Intelligent Cube data in database using Intermediate Table Type
• Normalize Intelligent Cube data in database using Fallback Type
• Normalize Intelligent Cube data basing on dimensions with attribute lookup filtering
• Normalize Intelligent Cube data basing on dimensions with no attribute lookup filtering
Normalize Intelligent Cube data in Intelligence Server
Data population for reports
Defines if and how report data is normalized to save memory resources.
• Do not normalize report data
• Normalize report data in Intelligence Server
• Normalize report data in database using Intermediate Table Type
• Normalize report data in database using Fallback Table Type
• Normalize report data basing on dimensions with attribute lookup filtering
Do not normalize report data
Default Sort Behavior for Attribute Elements in Reports
Determines whether the sort order of attribute elements on reports considers special sort order formatting defined for attributes.
• Sort attribute elements based on the attribute ID form for each attribute
• Sort attribute elements based on the defined 'Report Sort' setting of all attribute forms for each attribute
Sort attribute elements based on the attribute ID form for each attribute
Dimensionality Model
Determines level (dimension) replacement for non parent-child related attributes in the same hierarchy.
• Use relational model
• Use dimensional model
Use relational model
Engine Attribute Role Options
Enable or disable the Analytical Engine's ability to treat attributes defined on the same column with the same expression as attribute roles.
• Enable Engine Attribute Role feature
• Disable Engine Attribute Role feature
Disable Engine Attribute Role feature
Filter tree optimization for metric qualifications
Determines if metric qualifications that are included in separate passes of SQL are included in a single pass of SQL when possible.
• Enable Filter tree optimization for metric qualifications
• Disable Filter tree optimization for metric qualifications
Enable Filter tree optimization for metric qualifications
Incremental Data Transfer
Determines whether data that is transferred between Intelligence Server and a database is performed using a single transfer of data or multiple, incremental transfers of data
• Enable Incremental Data Transfer
• Disable Incremental Data Transfer
Disable Incremental Data Transfer
Maximum Parallel Queries Per Report
Determines how many queries can be executed in parallel as part of parallel query execution support
User-defined
2
MD Partition Prequery Option
Allows you to choose how to handle prequerying the metadata partition.
• Use count(*) in prequery
• Use constant in prequery
Use count(*) in prequery
Multiple data source support
Defines which technique to use to support multiple data sources in a project.
• Use MultiSource Option to access multiple data sources
• Use database gateway support to access multiple data sources
Use MultiSource Option to access multiple data source
OLAP function support
Defines whether OLAP functions support backwards compatibility or reflect enhancements to OLAP function logic.
• Preserve backwards compatibility with 8.1.x and earlier
• Recommended with 9.0 and later
Preserve backwards compatibility with 8.1.x and earlier
Parallel Query Execution
Determines whether MicroStrategy attempts to execute multiple queries in parallel to return report results faster and publish Intelligent Cubes.
• Disable parallel query execution
• Enable parallel query execution for multiple data source reports only
• Enable parallel query execution for all reports that support it
Disable parallel query execution
Parallel Query Execution Improvement Estimate in SQL View
Determines whether reports and Intelligent Cubes include an estimate in the percent of processing time that would be saved if parallel Query execution was used to run multiple queries in parallel.
• Disable parallel query execution improvement estimate in SQL view
• Enable parallel query execution improvement estimate in SQL view
Disable parallel query execution improvement estimate in SQL view
Rank Method if DB Ranking Not Used
Determines how calculation ranking is performed.
• Use ODBC ranking (MSTR 6 method)
• Analytical engine performs rank
Use ODBC ranking (MSTR 6 method).
Remove Aggregation Method
Determines whether to keep or remove aggregations in SQL queries executed from MicroStrategy.
• Remove aggregation according to key of FROM clause
• Remove aggregation according to key of fact tables (old behavior)
Remove aggregation according to key of FROM clause
Remove Group By Option
Determines whether Group By and aggregations are used for attributes with the same primary key.
• Remove aggregation and Group By when Select level is identical to From level
• Remove aggregation and Group By when Select level contains all attribute(s) in From level
Remove aggregation and Group By when Select level is identical to From level
Remove Repeated Tables For Outer Joins
Determines whether an optimization for outer join processing is enabled or disabled.
• Disable optimization to remove repeated tables in full outer join and left outer join passes
• Enable optimization to remove repeated tables in full outer join and left outer join passes
Enable optimization to remove repeated tables in full outer join and left outer join passes
Set Operator Optimization
Allows you to use set operators in sub queries to combine multiple filter qualifications. Set operators are only supported by certain database platforms and with certain sub query types.
• Disable Set Operator Optimization
• Enable Set Operator Optimization (if supported by database and [Sub Query Type])
Disable Set Operator Optimization
SQL Global Optimization
Determines the level by which SQL queries in reports are optimized.
• Level 0: No optimization
• Level 1: Remove Unused and Duplicate Passes
• Level 2: Level 1 + Merge Passes with Different SELECT
• Level 3: Level 2 + Merge Passes, which only hit DB Tables, with different WHERE
• Level 4: Level 2 + Merge All Passes with Different WHERE
Level 4: Level 2 + Merge All Passes with Different WHERE
Sub Query Type
Allows you to determine the type of subquery used in engine-generated SQL.
• WHERE EXISTS (SELECT * ...)
• WHERE EXISTS (SELECT col1, col2...)
• WHERE COL1 IN (SELECT s1.COL1...) falling back to EXISTS (SELECT * ...) for multiple columns IN
• WHERE (COL1, COL2...) IN (SELECT s1.COL1, s1.COL2...)
• Use Temporary Table, falling back to EXISTS (SELECT *...) for correlated subquery
• WHERE COL1 IN (SELECT s1.COL1...) falling back to EXISTS (SELECT col1, col2 ...) for multiple columns IN
• Use Temporary Table, falling back to IN (SELECT COL) for correlated subquery
Use Temporary Table, falling back to EXISTS (SELECT *...) for correlated subquery
Transformation Formula Optimization
Defines whether to attempt to improve performance of reports that use expression-based transformations.
• Always join with transformation table to perform transformation
• Use transformation formula instead of join with transformation table when possible
Use transformation formula instead of join with transformation table when possible
Unrelated Filter Options
Determines whether the Analytical Engine should keep or remove the unrelated filter.
• Remove unrelated filter
• Keep unrelated filter
• Keep unrelated filter and put condition from unrelated attributes in one subquery group
Remove unrelated filter
Unrelated Filter Options for Nested Metrics
Determines whether the Analytical Engine should keep or remove the unrelated filters when using nested metrics.
• Use the 8.1.x behavior:
• Use the 9.0.x behavior:
Use the 8.1.x behavior
WHERE Clause Driving Table
Determines the table used for qualifications in the WHERE clause.
• Use lookup table
• Use fact table
Use fact table







Labels:

Comments

Post a Comment

Popular posts from this blog

Microstrategy Custom number formatting symbols

Custom number formatting symbols If none of the built-in number formats meet your needs, you can create your own custom format in the Number tab of the Format Cells dialog box. Select  Custom  as the Category and create the format using the number format symbols listed in the table below. Each custom format can have up to four optional sections, one each for: Positive numbers Negative numbers Zeros Text Each section is optional. Separate the sections by semicolons, as shown in the example below: #,###;(#,###);0;"Error: Entry must be numeric" For more examples, see  Custom number formatting examples . To jump to a section of the formatting symbol table, click one of the following: Numeric symbols Character/text symbols Date and time symbols Text color symbols Currency symbols Conditional symbols Numeric symbols For details on how numeric symbols apply to the Big Decimal data type, refer to the  Project Design Guide . ...
4 comments
Read more

MicroStrategy URL API Parameters

MicroStrategy URL Structure The following table summarizes the root URL structure used for every request to MicroStrategy Web. Environment Main Application URL Administration URL J2EE http://webserver/MicroStrategy/servlet/mstrWeb http://webserver/MicroStrategy/servlet/mstrWebAdmin .NET http://webserver/MicroStrategy/asp/Main.aspx http://webserver/MicroStrategy/asp/Admin.aspx Every request sent to MicroStrategy Web calls a central controller. Parameters are appended to  Main.aspx  or  mstrWeb  (in a .NET and J2EE environment, respectively) to indicate to the controller how the request should be internally forwarded and handled. The following examples show a URL for accessing a MicroStrategy folder when the user does not have an existing session. The URL contains not only the parameters needed to connect to MicroStrategy Web, but also the parameters needed to log on and create a session. J2EE environment: <a href="http:...
2 comments
Read more

Custom Subtotal Displays in MicroStrategy

Defining custom subtotal displays in MicroStrategy By default, when users apply subtotals in a report, the name of the subtotal is displayed in the subtotal line items that appear in the report. Users can use custom subtotals to give more control over the characteristics of a subtotal. Custom subtotals allow users to define custom subtotal line items that appear on the reports  U sers can make the subtotal name dynamic by typing special characters in the subtotal name field as listed in the following table. Character Description #A The name of the attribute under which the subtotal appears. #P The name of the attribute to the left of, or above the attribute under which the subtotal appears. #0 All the forms of the parent element. #1 The first form of the parent element reading from left to right or from top to bottom. #2 The second form of the parent element reading from left to right or from top to bottom. #3 The third form of th...
Post a Comment
Read more

Control the display of null and zero metric values

Show   Control the display of null and zero metric values in a grid report You can determine how to display or hide rows and columns in a grid report that consist only of null or zero metric values. You can have MicroStrategy hide the rows and columns in the following ways: Hide rows and columns that consist only of null metric values Hide rows and columns that consist only of zero metric values Hide rows and columns that consist only of null or zero metric values (default) Once you have defined how MicroStrategy hides null and zero metric values in the grid, you can quickly show or hide the grid using the Hide Nulls/Zeros option in the Data menu, as described below, or by clicking the  Hide Nulls/Zeros  icon  in the Data toolbar. To determine how null and zero metric values are displayed or hidden in a grid report Open the report in Edit mode. From the  Tools  menu, select  Report Options . The Report Options...
Post a Comment
Read more

Case functions Microstrategy

Ca se functions Microstrategy Case functions return specified data in a SQL query based on the evaluation of user-defined conditions. In general, a user specifies a list of conditions and corresponding return values. Case This function evaluates multiple expressions until a condition is determined to be true, then returns a corresponding value. If all conditions are false, a default value is returned.  Case  can be used for categorizing data based on multiple conditions. This is a single-value function. Syntax Case ( Condition1 ,  ReturnValue1 ,  Condition2 , ReturnValue2 ,...,  DefaultValue ) Example Case(([Total Revenue] < 300000), 0, ([Total Revenue] < 600000), 1, 2) sum(Case (Day@DESC in (“Sat”,”Sun”), Sales, 0) {~+} Sum(Case(Category@DESC In("Books","Electronics"),Revenue,0)){~+} CaseV (case vector) CaseV  evaluates a single metric and returns different values according to the results. It can be used to perfo...
3 comments
Read more

Microstrategy Report Services documents and dashboards

Microstrategy Report Services documents vs Dashboards A MicroStrategy Report Services document displays data coming from multiple reports, with the data laid out and designed in presentation-quality format. Most data on a document is from one or more underlying datasets. A dataset is a standard MicroStrategy report. Other document components that do not originate from the dataset, such as static text used for a title or heading, page numbers, and images, are added by the document's designer and are stored in the document's definition. A Report Services (RS) dashboard is a special type of document. An RS dashboard is commonly only one page long, is intended to be viewed online, and usually provides interactive features that let analysts change how they view the dashboard’s data, as well as what data they are viewing. A broad selection of widgets and a wide variety of formatting options allow you to design a customized, interactive dashboard. Both documents and RS dashb...
1 comment
Read more

System Manager workflow to execute on a schedule

Creating a System Manager workflow to execute on a schedule System Manager workflow can execute on a schedule or after an event has been triggered. This can be accomplished by creating a simple batch file, and scheduling that batch file to execute with a third-party tool like Microsoft Task Scheduler.   Note : To avoid user permission conflicts, the following steps must be performed with highest privileges.   In the below example, the workflow makes the i-server restarts every day.   1. The user must first have a valid workflow. This particular workflow is a template that is delivered out-of-the-box with System Manager.   2. Save the workflow in  .smw  format.   3. In a text editor (such as Notepad), enter the command line statement that the task scheduler should execute.     MASysMgr.exe -w C:\filename.smw” “UserName=User1 “Password=1234”   4. Save the file in  .bat  ...
1 comment
Read more

Retrieve a list of user groups and the associated users in MicroStrategy

    Retrieve a list of user groups and the associated users in MicroStrategy Developer 9.x Although MicroStrategy Command Manager 9.x can be used to generate lists of all user groups and all users within a particular group, there is currently no way for it to retrieve a list of all groups and all of the users in each group. If such a list is desired, it can be created using the Project Documentation Wizard in MicroStrategy Desktop Developer 9.x. Follow the steps below to create a list of all groups and the users in each group: In MicroStrategy Developer 9.x, select 'Project Documentation' from the Tools menu to start the wizard. Select any project that is in the project source that contains the users and groups and click Next. Select only Configuration Objects for documentation. Uncheck the 'Basic Properties' object category from the next screen, as shown below: Then select only 'User Group' under the Configuratio...
Post a Comment
Read more

Report filters are being ignored in Microstrategy report SQL

Report filters are being ignored in Microstrategy report SQL When users run a report using a simple filter, the filter is not applied to the report in MicroStrategy Developer 9.x and 10.x. The results returned to the users are not filtered as expected. The Report SQL indicates that the filter has not been applied. CAUSE: One scenario is that the MicroStrategy 10.x SQL Engine is ignoring the conditionality at the report level because a metric in the report also contains a related conditionality which has been set to "remove related report filter elements" or "ignore" the filtering criteria at the report level. ACTION: When a report contains the above situation, the follow steps can be done to have both filters applied and be merged for the report results to be executed with: If the report's and metric's filter affect attributes from the same hierarchy, check that the following setting is un-checked: This setting is placed in the me...
Post a Comment
Read more

Settings for Outer Join between metrics in MicroStrategy

Settings for Outer Join between metrics in MicroStrategy MicroStrategy adopts multi-pass logic to determine the execution plan for a report. This means that every metric is evaluated in separate SQL passes. Outer Joins come into play when MicroStrategy Engine merges the results from all SQL passes into one report. For a multi-pass report, different Outer Join behaviors can give the user completely different results. In addition, report metrics can be of different types which can, in some cases, influence the result of the outer join. In MicroStrategy, there are two settings that users can access to control Outer Join behavior : Formula Join Type and Metric Join Type . Metric Join Type: VLDB Setting at Database Instance Level Report and Template Levels Report Editor > Data > Report Data Options Metric Level   Metric editor > Tools > Metric Join Type Control Join between Metrics Formula Join Type: Only at Compound/Split...
Post a Comment
Read more