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Adaptive relational database access

  • US 8,335,804 B2
  • Filed: 03/29/2010
  • Issued: 12/18/2012
  • Est. Priority Date: 03/29/2010
  • Status: Expired due to Fees
First Claim
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1. A machine-implemented method comprising:

  • receiving an alteration request to mark a selected column in a database table as an unused column;

    updating a database control table indicating that the selected column is unused;

    after the database control table is updated, returning data not stored in the selected column in response to a read request corresponding to the selected column;

    retrieving a write value associated with the alteration request;

    storing the write value in the control table;

    receiving a write request corresponding to the selected column from a calling routine, wherein the write request includes write data and identifies one or more rows to write to the database table; and

    in response to receiving the write request, retrieving the previously stored write value, and writing the previously stored write value to the selected column of the one or more rows, wherein the write data included in the write request is not written to the selected column of the one or more rows.

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