I want to write a query in openstudio application to get some result from the latest energyplus sql file . I am getting an error. How to get the last file ?

 openstudio::path sqlFilepath = openstudio::SqlFile::path();
   boost::optional<openstudio::SqlFile> mySqlFile = openstudio::SqlFile::path();
   if (mySqlFile && mySqlFile->connectionOpen())
{

........................

this does not work

I want to write a query in openstudio application to get some result from the latest energyplus sql file . I am getting an error. How to get the last file ?

 
openstudio::path sqlFilepath = openstudio::SqlFile::path();
      boost::optional<openstudio::SqlFile> boost::optional mySqlFile = openstudio::SqlFile::path();
      if (mySqlFile && mySqlFile->connectionOpen())
{