MicroStrategy ONE
Optimizing Queries
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 |
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 |
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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 |
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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. |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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Determines level (dimension) replacement for non parent-child related attributes in the same hierarchy. |
Use relational model Use dimensional model |
Use relational model |
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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 |
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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 |
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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 |
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Determines how many queries can be executed in parallel as part of parallel query execution support |
User-defined |
2 |
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Allows you to choose how to handle prequerying the metadata partition. |
Use count(*) in prequery Use constant in prequery |
Use count(*) in prequery |
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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 |
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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 |
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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 |
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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 |
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Determines how calculation ranking is performed. |
Use ODBC ranking (MSTR 6 method) Analytical engine performs rank |
Use ODBC ranking (MSTR 6 method). |
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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 |
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Determines whether |
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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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Determines the table used for qualifications in the WHERE clause. |
Use lookup table Use fact table |
Use fact table |