Table-and-cache-based database assist method

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395700, 395650, 364974, 3649746, 3649744, 3642834, 364DIG2, 364DIG1, G06F 1730

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active

054653525

ABSTRACT:
A database assist method is adapted to a data processing system which includes a first processing unit, an input/output unit which is coupled to the first processing unit, a second processing unit, a database and cache memory. The database assist method assists a database related process which includes selection of items from records stored in the database and includes the steps of (a) forming an execution procedure table which defines a procedure for retrieving information of interest from the database in response to a processing request from a request source, (b) generating at least a column information table which defines item structures within the records and a selection/projection table which defines the items to be extracted and extracting conditions based on the execution procedure table, (c) storing a block group of interest into cache memory from the database based on the column information table and the selection/projection table and carrying out a specified process with respect to the stored block group for a specified item, and (d) returning a result of the specified process carried out in step (c) to the request source by a batch processing.

REFERENCES:
patent: 5091852 (1992-02-01), Tsuchida et al.
patent: 5317727 (1994-05-01), Tsuchida et al.
patent: 5317731 (1994-05-01), Dias et al.
Nancy C. Ramsey, "Integration of the Optical Storage Processor and the DBC/1012 Database Computer", Digest of Papers. Tenth IEEE Symposium on Mass Storage Systems. Crisis in Mass Storage, IEEE Computer Society Press, 7-10 May 1990, pp. 94-100.
Robert D. Sloan, "A Practical Implementation of the Data Base Machine-Terradata DBC/1012", Proceedings of the Twenty-Fifth Hawaii International Conference on System Sciences, IEEE Computer Society Press, 1991, pp. 320-326.

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