File management method using transposed file

Details File management method using transposed file File management method using transposed file

G - Physics

06

F

G06F 17/30 (2006.01) G06F 17/60 (1995.01)

Patent

CA 2287608

A file management system performs flexible and efficient file management with a transposed file. First, variable-length logical fields constituting the records in an original file are converted to variable-length internalfields with field-to-field correspondence being maintained and fields aligned with word boundaries. Next, the records consisting, of internal fields are divided into multiple record groups which may comprise a variable number of records. For each record group, one or a plurality of internal fields of all records are then sorted into blocks and blocks are set in a row as a group. Groups thus generated from all records are assembled into a transposed file. When requested to retrieve field data from the original file, the file management system accesses the transposed file and reads only blocks comprising target field data.

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