Creates a storage map for a relation. A storage map associates
    a relation with a particular storage area or areas. The DEFINE
    STORAGE MAP statement allows you to specify:

    o  Which storage areas the records in a relation will be stored
       in

    o  Whether an index will be used to choose a target location for
       storing the record

    o  Whether data compression will be enabled when the records are
       stored

    o  Which storage areas segmented strings will be stored in

    Example:

    RDO>   DEFINE STORAGE MAP JOBS_MAP FOR JOBS
    cont>    STORE WITHIN JOBS
    cont>  END JOBS_MAP STORAGE MAP.