DataWeave 2.6.0 Release Notes

DataWeave is the programming language designed by MuleSoft for data transformation. It is also the expression language Mule runtime engine uses to configure components and connectors.

For more detail, see DataWeave Language.

November 2024

DataWeave 2.6.9 is bundled with the Mule 4.6.9 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
The `stripTrailingZeroes` compatibility flag is now added to preserve the decimal format.	W-17030593
Apache POI folder used for temporal files is no longer deleted.	W-16899674

The stripTrailingZeroes compatibility flag is now added to preserve the decimal format.

W-17030593

Apache POI folder used for temporal files is no longer deleted.

W-16899674

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

October 2024

DataWeave 2.6.8 is bundled with the Mule 4.6.8 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
DataWeave descendant selector performance is now improved.	W-16343577
Streaming capability for arguments at `sum`, `countBy`, and `sumBy` functions is now enabled.	W-16125755
Input/output `MimeType` properties are now preserved as expected.	W-16161736
Access error for Java 17 encapsulation errors is now improved.	W-15705596
Coercion error is now caught inside `try` as expected.	W-15323897

DataWeave descendant selector performance is now improved.

W-16343577

Streaming capability for arguments at sum, countBy, and sumBy functions is now enabled.

W-16125755

Input/output MimeType properties are now preserved as expected.

W-16161736

Access error for Java 17 encapsulation errors is now improved.

W-15705596

Coercion error is now caught inside try as expected.

W-15323897

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

September 2024

DataWeave 2.6.7 is bundled with the Mule 4.6.7 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution	ID
DataWeave now preserves MimeType properties correctly.	W-16161736

Issue Resolution

DataWeave now preserves MimeType properties correctly.

W-16161736

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

August 2024

DataWeave 2.6.6 is bundled with the Mule 4.6.6 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
Argument materialization is now improved at the `dw::Runtime::try` function.	W-15323897
Streaming capability is now enabled for arguments of `sum`, `countBy`, and `sumBy` functions.	W-16125755

Argument materialization is now improved at the dw::Runtime::try function.

W-15323897

Streaming capability is now enabled for arguments of sum, countBy, and sumBy functions.

W-16125755

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

July 2024

DataWeave 2.6.5 is bundled with the Mule 4.6.5 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
Enforced Java accessibility restrictions only for Mule apps with DataWeave language level version 2.6 and later and executing with Java 17 and later.	W-15832793
Materialization issues no longer occur with schema properties.	W-15839190
The Flat File module now adds the `substituteCharacterAsMissingValue` reader property.	W-15571377
The Flat File module now adds the `fillRedefinesByMaxLength` writer property.	W-15973636

Enforced Java accessibility restrictions only for Mule apps with DataWeave language level version 2.6 and later and executing with Java 17 and later.

W-15832793

Materialization issues no longer occur with schema properties.

W-15839190

The Flat File module now adds the substituteCharacterAsMissingValue reader property.

W-15571377

The Flat File module now adds the fillRedefinesByMaxLength writer property.

W-15973636

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

June 2024

DataWeave 2.6.4 is bundled with the Mule 4.6.4 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
A `java.io.IOException` exception no longer occurs when writing the same binary input multiple times for JSON and XML formats.	W-14589732
The Excel writer now generates XLSX files using ZIP specification 2.0.	W-15534640
When comparing a `Date` with a `String` representation of a date, the `Date` format is now used to coerce the `String` accordingly.	W-15478713
Access error messages for Java 17 encapsulation errors are now improved.	W-15705596

A java.io.IOException exception no longer occurs when writing the same binary input multiple times for JSON and XML formats.

W-14589732

The Excel writer now generates XLSX files using ZIP specification 2.0.

W-15534640

When comparing a Date with a String representation of a date, the Date format is now used to coerce the String accordingly.

W-15478713

Access error messages for Java 17 encapsulation errors are now improved.

W-15705596

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

May 2024

DataWeave 2.6.3 is bundled with the Mule 4.6.3 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
`ArithmeticException` no longer executes `toHex` with non-integer numbers.	W-15006840
Performance degradation no longer occurs when an array is concatenated.	W-15399854

ArithmeticException no longer executes toHex with non-integer numbers.

W-15006840

Performance degradation no longer occurs when an array is concatenated.

W-15399854

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

April 2024

DataWeave 2.6.2 is bundled with the Mule 4.6.2 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
Inconsistent behavior no longer occurs between in-memory and streaming XML parsers for deciding document encoding.	W-15110015
Streaming for DataWeave-based data formats like `ndjson` now works as expected.	W-15262860
The Excel reader no longer reads furigana characters.	W-14991276
Coercion of the third parameter on the ternary function executor now works as expected.	W-15061008

Inconsistent behavior no longer occurs between in-memory and streaming XML parsers for deciding document encoding.

W-15110015

Streaming for DataWeave-based data formats like ndjson now works as expected.

W-15262860

The Excel reader no longer reads furigana characters.

W-14991276

Coercion of the third parameter on the ternary function executor now works as expected.

W-15061008

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

March 2024

DataWeave 2.6.1 is bundled with the Mule 4.6.1 release. The Mule patch release addresses the following DataWeave issues:

Issue Resolution	ID
Performance is now improved when coercing addition and subtraction operations.	W-14927555

Issue Resolution

Performance is now improved when coercing addition and subtraction operations.

W-14927555

For details about the Mule release and patch updates, see Mule Runtime Engine 4.6.0 Release Notes.

February 6, 2024

DataWeave 2.6.0 is bundled with the Mule 4.6.0 release. For details about the Mule release, see Mule Runtime Engine 4.6.0 Release Notes.

What’s New

The 2.6.0 version of DataWeave introduces the following new features and enhancements:

Extended format support:

DataWeave now supports Java 17. See Java Format.
Mule expression language service are now modularized.

Compatibility

The following table specifies which version of DataWeave is bundled with each Mule runtime engine release:

Mule Version	DataWeave Version
4.8	2.8
4.7	2.7
4.6	2.6
4.5	2.5
4.4	2.4
4.3	2.3
4.2	2.2
4.1	2.1
3.9	1.2
3.8	1.1
3.7	1.0

Fixed Issues

The release addresses the following DataWeave issues and incorporates all patch updates from the 2.5.0 DataWeave release through January 2024:

Issue Resolution ID

Issue Resolution	ID
Caching now works correctly when coercing for addition and subtraction operations.	W-14591653
`do` scope declarations with pattern matching now properly reflect variable names when variables are optimized with common subexpression elimination.	W-14514837
The `minInflateRatio` property is now added to Excel format to control the zip bomb check threshold.	W-14315728

Caching now works correctly when coercing for addition and subtraction operations.

W-14591653

do scope declarations with pattern matching now properly reflect variable names when variables are optimized with common subexpression elimination.

W-14514837

The minInflateRatio property is now added to Excel format to control the zip bomb check threshold.

W-14315728

Upgrade

This version of DataWeave is bundled with Mule. DataWeave upgrades take place through Mule. See Mule Upgrades and Patch Updates.

Mule Version	DataWeave Version
4.8	2.8
4.7	2.7
4.6	2.6
4.5	2.5
4.4	2.4
4.3	2.3
4.2	2.2
4.1	2.1
3.9	1.2
3.8	1.1
3.7	1.0

Mule Version	DataWeave Version
4.8	2.8
4.7	2.7
4.6	2.6
4.5	2.5
4.4	2.4
4.3	2.3
4.2	2.2
4.1	2.1
3.9	1.2
3.8	1.1
3.7	1.0

DataWeave 2.6.0 Release Notes

November 2024

October 2024

September 2024

August 2024

July 2024

June 2024

May 2024

April 2024

March 2024

February 6, 2024

What’s New

Compatibility

Fixed Issues

Upgrade

See Also

Mule Version	DataWeave Version
4.8	2.8
4.7	2.7
4.6	2.6
4.5	2.5
4.4	2.4
4.3	2.3
4.2	2.2
4.1	2.1
3.9	1.2
3.8	1.1
3.7	1.0