Defines the directory for temporary files.
    The DBTEMP environment variable defines the directory for temporary files created by the
      runtime system.
    Important: The DBTEMP environment variable is also used by the IBM®
      Informix® database client and server for temporary
      files.
    This environment variable is use to create temporary files for:
    
      - TEXT or BYTE data located in a temporary file
          (LOCATE IN FILE without file name specification).
- Temporary files of emulated scrollable cursors when the database engine does not support
        this feature.
- Temporary file name generation with os.Path.makeTempName().
- Temporary files created by the Web Services API, such as com.HTTPResponse.getFileResponse.
On mobile devices, do not set DBTEMP environment variable: The runtime system will
      automatically use the appriopriate temporary directory withing the app sandbox file
      system.