![]() A copy file command that copies records with duplicate keys in this file is not completed.įIFO: File level keyword used to specify that if records with duplicate key values are retrieved from the same physical or logical file member, they are to be retrieved in a first-in first-out (FIFO) order.Īt least one key field must be specified in a file containing the FIFO keyword. ![]() When a workstation user is using data file utility (DFU), a message is displayed at the workstation. The application program issuing the write, or the update operation receives an error message. Any insertions or additions of new records, or updates to existing records, which might result in a duplicate key, are rejected. You can specify whether null key values are to be considered as duplicates using the parameter. UNIQUE: File level keyword used to specify that records with duplicate key values are not allowed within a member of this physical or logical file.
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