Function DbPack() Foundation
Physically removes records marked as deleted from a file.
DbPack() --> NIL
The return value of DbPack() is always NIL.
The database function DbPack() reorganizes a file open in a work area by physically removing all records marked as deleted.
A record is marked as deleted with the function DbDelete() and is unmarked as deleted (the record is recalled) using the function DbRecall(). records with a deletion flag are logically filtered out and made not visible by the command SET DELETED ON. But they can be made visible again using DbRecall(). After DbPack() completes, records can no longer be "undeleted" with DbRecall() since they are physically removed from the file.
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