ENABLE Reference Manual

ENABLE ATTRIBUTES
EXCLUDE Attribute
ENABLE cannot use a box for an application if you exclude:
• All of the fields described in a record description. If you
try to exclude all fields, ENABLE issues an error message
stating that "All fields have been excluded from this box."
• For any box except the box at the first level of the tree
structure, all fields except the join field. If you exclude
all fields except the join field from a such a box, ENABLE
issues the error message: "No field is left to be
displayed in box." Refer to the description of the TREE
attribute for an explanation of the levels of a tree
structure.
• The primary key field of a key-sequenced file or a unique
alternate key field from any type of file when INSERT is set
ON. ENABLE cannot generate the application because an insert
operation could cause a duplicate key error. If you try to
exclude a unique key field, ENABLE issues the error message:
"Field corresponding to unique key has been excluded -
<field-name>."
• All key fields from a box. If you exclude all key fields from
a box, ENABLE issues the error message: "All key fields
have been excluded from this box."
• The join field from a box. Refer to the description of the
TREE attribute for an explanation of a join field.
• Any component of a group join field. All components of a
group used as a join field must be in the same order as they
appear in the dictionary, and all fields in the group must
be present.
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