Get All the Checkedout documents sharepoint

using Microsoft.Office.Server.Search.Query;

 

ResultTableCollection rtc = null;
DataTable retResults = new DataTable();

           

string fullTextSql = "SELECT ModifiedBy,Title,owsCheckoutUser,FileExtension,owsFileLeafRef,Path FROM SCOPE() WHERE owsCheckoutUser IS NOT NULL"

 

 using (SPSite site = new SPSite(http://servername))

                {
                    using (FullTextSqlQuery query = new FullTextSqlQuery(site))
                    {

                       
                        query.QueryText = fullTextSql;
                        query.ResultTypes = ResultType.RelevantResults;

                        query.RowLimit = rowLimit;
                       
                        rtc = query.Execute();

                        if (rtc.Count > 0)
                        {
                                             
                            using(ResultTable relevantResults = rtc[ResultType.RelevantResults])

                                retResults.Load(relevantResults, LoadOption.OverwriteChanges);
          
                        }

           }