et_fields_clause ::=
 
 FIELDS
 [IGNORE_CHARS_AFTER_EOR]
 [CSV [WITH EMBEDDED | WITHOUT EMBEDDED]]
 [delim_spec]
 [trim_spec]
 [ALL FIELDS OVERRIDE THESE FIELDS]
 [MISSING FIELD VALUES ARE NULL]
 [REJECT ROWS WITH ALL NULL FIELDS]
 [DATE FORMAT {DATE | TIMESTAMP} MASK string]
 [NULLIF | NONULLIF]
 [field_list]