src/Metadata/Set-XrmColumn.ps1

<#
    .SYNOPSIS
    Update a column in Microsoft Dataverse.

    .DESCRIPTION
    Update an existing attribute / column metadata using UpdateAttributeRequest.

    .PARAMETER XrmClient
    Xrm connector initialized to target instance. Use latest one by default. (Dataverse ServiceClient)

    .PARAMETER EntityLogicalName
    Table / Entity logical name.

    .PARAMETER Attribute
    The AttributeMetadata object with updated properties.

    .PARAMETER SolutionUniqueName
    Solution unique name context for the update.

    .PARAMETER MergeLabels
    Whether to merge labels. Default: true.

    .OUTPUTS
    Microsoft.Xrm.Sdk.OrganizationResponse. The UpdateAttribute response.

    .EXAMPLE
    $attr = Get-XrmColumn -EntityLogicalName "account" -LogicalName "new_code";
    $attr.DisplayName = New-XrmLabel -Text "Project Code";
    Set-XrmColumn -EntityLogicalName "account" -Attribute $attr;
#>

function Set-XrmColumn {
    [CmdletBinding()]
    [OutputType([Microsoft.Xrm.Sdk.OrganizationResponse])]
    param
    (
        [Parameter(Mandatory = $false, ValueFromPipeline)]
        [Microsoft.PowerPlatform.Dataverse.Client.ServiceClient]
        $XrmClient = $Global:XrmClient,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]
        $EntityLogicalName,

        [Parameter(Mandatory = $true)]
        [ValidateNotNull()]
        [Microsoft.Xrm.Sdk.Metadata.AttributeMetadata]
        $Attribute,

        [Parameter(Mandatory = $false)]
        [string]
        $SolutionUniqueName,

        [Parameter(Mandatory = $false)]
        [bool]
        $MergeLabels = $true
    )
    begin {
        $StopWatch = [System.Diagnostics.Stopwatch]::StartNew();
        Trace-XrmFunction -Name $MyInvocation.MyCommand.Name -Stage Start -Parameters ($MyInvocation.MyCommand.Parameters);
    }
    process {
        $request = [Microsoft.Xrm.Sdk.Messages.UpdateAttributeRequest]::new();
        $request.EntityName = $EntityLogicalName;
        $request.Attribute = $Attribute;
        $request.MergeLabels = $MergeLabels;

        if ($PSBoundParameters.ContainsKey('SolutionUniqueName')) {
            $request.Parameters["SolutionUniqueName"] = $SolutionUniqueName;
        }

        $response = Invoke-XrmRequest -XrmClient $XrmClient -Request $request;
        $response;
    }
    end {
        $StopWatch.Stop();
        Trace-XrmFunction -Name $MyInvocation.MyCommand.Name -Stage Stop -StopWatch $StopWatch;
    }
}

Export-ModuleMember -Function Set-XrmColumn -Alias *;