Writes all fields of the field group fg (see
FIELD-GROUPS) as one record to a
sequential dataset (paging). If a field group HEADER has been
defined, its fields prefix each record to form a sort key. You can sort
this dataset with SORT and process it
with LOOP ... ENDLOOP. After this,
EXTRACT cannot be execuuted again.
Note
As soon as the first dataset for a field group has been
extracted with EXTRACT , the field group cannot be expanded using
INSERT . The field group
HEADER , in particular, cannot be expanded after the first
EXTRACT (regardless of field group).
Note
Runtime errors
EXTRACT_AFTER_SORT/LOOP : EXTRACT after SORT or
LOOP .
EXTRACT_FIELD_TOO_LARGE : Occupied length of a single field is
too long.
EXTRACT_HEADER_NOT_UNIQUE : Field group HEADER was
modified after records had been extracted with EXTRACT .
EXTRACT_TOO_LARGE : Total data length of a record to be
extracted (including HEADER fields) is too long.