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Engine

This section contains release notes for the DAX Optimizer engine. When a new version of the engine is released, it is a good idea to re-run the optimizer on your models to take advantage of the latest improvements.

  • v1.9.8

    Oct 21, 2025

    Bug Fixes

    • Fixed an issue in the evaluation of the SUMMARIZECOLUMNS function that could cause model analysis to fail

  • v1.8.29

    Apr 24, 2025

    New Features

    • Added support for Calculation Item analysis.
    • Added support for Table Permission (RLS) analysis.
    • Added new rule for DIVIDE used instead of the division operator /.

    Bug Fixes

    • Fixed an issue where certain DAX functions were incorrectly identified as duplicates, such as volatile functions.

    Other Enhancements

    • Improved analysis and estimation of scalar predicates and filter arguments.
    • Improved analysis and estimation of columns where the IsAvailableInMDX property is set to false.

  • v1.7.47

    Feb 07, 2025

    Bug Fixes

    • Fixed an issue in estimating the materialization of nested iterators that could cause the model analysis to fail.

  • v1.7.46

    Feb 03, 2025

    Bug Fixes

    • Fixed an issue in the evaluation of the GROUPBY function where an empty input table (zero cardinality) could cause model analysis to fail.

  • v1.7.45

    Jan 17, 2025

    Bug Fixes

    • Fixed an issue in the evaluation of FIRST/LASTNONBLANK functions, where using a column reference as the ColumnName argument could cause model analysis to fail.

  • v1.7.44

    Dec 16, 2024

    Bug Fixes

    • Fixed an issue in cardinality estimation of grouping functions where having all grouping columns with zero cardinality (from empty tables) could cause model analysis to fail.

  • v1.7.41

    Dec 05, 2024

    Bug Fixes

    • Fixed an issue in the evaluation of DETAILROWS when used as a filter argument in CALCULATE or CALCULATETABLE, which could cause the model analysis to fail.

  • v1.7.40

    Dec 03, 2024

    Bug Fixes

    • Fixed an issue in the evaluation of EXTERNALMEASURE that could cause a measure to be incorrectly reported as faulty.

    Other Enhancements

    • Internal engine performance improvements.

  • v1.7.35

    Nov 28, 2024

    Bug Fixes

    • Fixed an issue in the evaluation of SUMMARIZE where using grouping columns with zero cardinality (from empty tables) could cause model analysis to fail.

    Other Enhancements

    • Internal engine performance improvements

  • v1.6.9

    Sep 27, 2024

    Bug Fixes

    • Fixed an issue in the evaluation of MATCHBY that could cause a failure in model analysis.

  • v1.6.7

    Sep 24, 2024

    New Features

    • Added rule detection for FIRSTDATE and LASTDATE when used to return a scalar value.

    Bug Fixes

    • Fixed an issue in the evaluation of SUMMARIZECOLUMNS that could cause a failure in model analysis.

  • v1.5.12

    Sep 20, 2024

    Bug Fixes

    • Fixed an issue in the evaluation of HASONEVALUE that could cause a failure in model analysis.

  • v1.5.10

    Sep 02, 2024

    New Features

    • Added rule detection for AND condition between different columns in scalar predicate filter arguments.

    Other Enhancements

    • Improved cardinality estimate and impact analysis for scalar predicate filter arguments.

  • v1.2.6

    Jun 27, 2024

    New Features

    • Improved analysis and estimation of expressions containing dead code, such as unreferenced variables.

  • v1.1.6

    Jun 04, 2024

    New Features

    • Added rule detection for FILTER used as an iterator instead of modifying the filter context with the minimal number of column filters
    • Added rule detection for context transitions within an iterator over a table with non-unique rows

  • v0.5.5

    Mar 07, 2024

    Bug Fixes

    • Fixed error when a non-physical column is used in a scalar predicate

  • v0.5.1

    Dec 21, 2023

    New Features

    • Added rule detection related to IF used in iterators

  • v0.4.27

    Oct 03, 2023

    Bug Fixes

    • Fixed error when SWITCH is used as a scalar predicate

  • v0.4.26

    Sep 21, 2023

    New Features

    • Updated DAX syntax to support new parameters in window functions

  • v0.4.25

    Sep 14, 2023

    Bug Fixes

    • Fixed error in estimation caused by missing lineage in column reference

  • v0.4.24

    Sep 03, 2023

    Bug Fixes

    • Fixed error caused by PARTITIONBY
    • Ignored DumpFilter measures generated by DAX Studio

  • v0.4.22

    Aug 31, 2023

    Bug Fixes

    • Estimates columns cardinality when at zero in VPAX metadata
    • Fixed issues in duplicated functions detection and NaN results

    Other Enhancements

    • Internal engine performance improvements

  • v0.4.14

    Aug 22, 2023

    Bug Fixes

    • Fixed ORDERBY cardinality estimate error

  • v0.4.13

    Aug 02, 2023

    Bug Fixes

    • Fixed ALLCROSSFILTERED cardinality estimate error

    Other Enhancements

    • Updated VPAX libraries to 1.3.0