PATHLENGTH DAX Function (Parent-child)

Returns returns the number of items in a particular path string. This function returns 1 for the path generated for an ID at the top/root of a hierarchy.

Syntax

PATHLENGTH ( <Path> )
Parameter Attributes Description
Path

A string which contains a delimited list of IDs.

Return values

Scalar A single integer value.

The number of items that are parents to the specified item in a given PATH result, including the specified item.

» 1 related article
» 4 related functions

Examples

--  PATH generates a column containing the path of each node in a 
--  parent/child hierarchy
--
--  PATHLENGTH returns the length of a path column
--  PATHCONTAINS checks if a path column contains a value
DEFINE
    COLUMN Account[AccountPath] = PATH ( Account[AccountKey], Account[ParentAccountKey] )
    COLUMN Account[PathLength] = PATHLENGTH ( Account[AccountPath] )
    COLUMN Account[PathContains2] = PATHCONTAINS ( Account[AccountPath], 2 )
EVALUATE
    Account
ORDER BY [AccountPath]
AccountKey ParentAccountKey AccountName AccountPath PathLength PathContains2
1 (Blank) Profit and Loss after tax 1 1 false
19 1 Taxation 1|19 2 false
24 1 Profit and Loss before tax 1|24 2 false
2 24 Income 1|24|2 3 true
4 2 Sale Revenue 1|24|2|4 4 true
3 24 Expense 1|24|3 3 false
5 3 Cost of Goods Sold 1|24|3|5 4 false
6 3 Selling, General & Administrative Expenses 1|24|3|6 4 false
10 6 Light, Heat, Communication Cost 1|24|3|6|10 5 false
11 6 Property Costs 1|24|3|6|11 5 false
12 6 Other Expenses 1|24|3|6|12 5 false
13 6 Marketing Cost 1|24|3|6|13 5 false
14 13 Holiday Ad Cost 1|24|3|6|13|14 6 false
20 14 Radio & TV 1|24|3|6|13|14|20 7 false
21 14 Print 1|24|3|6|13|14|21 7 false
22 14 Internet 1|24|3|6|13|14|22 7 false
23 14 Other 1|24|3|6|13|14|23 7 false
15 13 Spring Ad Cost 1|24|3|6|13|15 6 false
16 13 Back-to-School Ad Cost 1|24|3|6|13|16 6 false
17 13 Business Ad Cost 1|24|3|6|13|17 6 false
18 13 Tax Time / Summer Ad Cost 1|24|3|6|13|18 6 false
7 6 Administration Expense 1|24|3|6|7 5 false
8 6 IT Cost 1|24|3|6|8 5 false
9 6 Human Capital 1|24|3|6|9 5 false

Related articles

Learn more about PATHLENGTH in the following articles:

  • Parent-Child Hierarchies

    DAX does not directly support parent-child hierarchies. To obtain a browsable hierarchy in the data model, you have to naturalize a parent-child hierarchy. DAX provides specific functions to naturalize a parent-child hierarchy using calculated columns. The complete pattern also includes measures that improve the visualization of ragged hierarchies in Power Pivot. » Read more

Related functions

Other related functions are:

Last update: Apr 2, 2021   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

Microsoft documentation: https://docs.microsoft.com/en-us/dax/pathlength-function-dax

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Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.

Iterator

Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.

Deprecated

This function is deprecated. Jump to the Alternatives section to see the function to use.

Deprecated

This parameter is deprecated and its use is not recommended.

DirectQuery compatibility

Limitations are placed on DAX expressions allowed in measures and calculated columns.
The state below shows the DirectQuery compatibility of the DAX function.

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