Specifies whether end users should be allowed to query or insert records in a block that is a detail block in a master-detail relation. When set to Yes, Oracle Forms does not allow records to be inserted in the detail block when there is no master record in the master block, and does not allow querying in the detail block when there is no master record that came from the database.
When Prevent Masterless Operation is Yes, Oracle Forms displays an appropriate message when end users attempt to insert or query a record:
FRM-41105: Cannot create records without a parent record.
FRM-41106: Cannot query records without a parent record.
Applies to relation
Set Oracle Forms, programmatically
Default
No