It should be as simple as
DATA: lt_options TYPE TABLE OF rfc_db_opt,
lt_fields TYPE TABLE OF rfc_db_fld,
lt_entries TYPE TABLE OF dpr_pha_type.
CALL FUNCTION 'RFC_READ_TABLE'
DESTINATION 'Y58CLNT800'
EXPORTING
query_table = 'DPR_PHA_TYPE'
TABLES
options = lt_options
fields = lt_fields
data = lt_entries.
However, this will only work if the table in question contains only character fields.