Get last approver of workflow in Dynamics AX

public Name workflowApprover(RecId _recId)
        {
            WorkflowTrackingStatusTable workflowTrackingStatus;
            WorkflowTrackingTable workflowTrackingTable;
            WorkflowTrackingCommentTable workflowTrackingCommentTable;
            UserInfo userInfo;
       
            select firstFast RecId, User from workflowTrackingTable
                order by RecId desc
            join workflowTrackingCommentTable
                where workflowTrackingCommentTable.WorkflowTrackingTable == workflowTrackingTable.RecId
            join UserInfo
                where UserInfo.id == WorkflowTrackingTable.User
            exists join workflowTrackingStatus
                where workflowTrackingTable.WorkflowTrackingStatusTable == workflowTrackingStatus.RecId
            && workflowTrackingStatus.ContextRecId      == _recId
            && workflowTrackingStatus.ContextTableId    == tableNum(CICGBCreditCommittal)// your custom table on which workflow is enabled.
            && workflowTrackingTable.TrackingType == WorkflowTrackingType::Approval;
       
            if (workflowTrackingTable.RecId > 0)
            {
                return userInfo.name;
            }
            else
            {
                return '';
            }
       }


Display method.

display Name displayWorkflowApproverName()

{

    WorkflowTrackingStatusTable     workflowTrackingStatus;

    WorkflowTrackingTable           workflowTrackingTable;

    WorkflowTrackingCommentTable    workflowTrackingCommentTable;

    UserInfo                        userInfo;

    Name                            _name;

    select firstFast RecId, User from workflowTrackingTable

        order by RecId desc

            join workflowTrackingCommentTable

        where workflowTrackingCommentTable.WorkflowTrackingTable == workflowTrackingTable.RecId

            join UserInfo

        where UserInfo.id == WorkflowTrackingTable.User

            exists join workflowTrackingStatus

        where workflowTrackingTable.WorkflowTrackingStatusTable == workflowTrackingStatus.RecId

    && workflowTrackingStatus.ContextRecId      == this.RecId

    && workflowTrackingStatus.ContextTableId    == tableNum(CICGBCreditCommittal)

    && workflowTrackingTable.TrackingType       == WorkflowTrackingType::Approval;

    if (workflowTrackingTable.RecId > 0)

    {

        _name=userInfo.name;

    }

    else

    {

        _name='';

    }

    return _name;

}