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  1. WiredTiger
  2. WT-4705

column-store no longer needs to handle WT_COL page offsets of 0

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Details

    • Technical Debt
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • WT3.2.0, 4.1.11
    • None
    • None
    • 3
    • Storage Engines 2019-04-08, Storage Engines 2019-04-22

    Description

      In 2011, column-store files were changed to support physical extension (see commit 2f5ab0b9c47885cbd29aa00028be8f0f64bf4cb2). As part of that commit, the column-store code was changed to treat a WT_COL page offset of 0 as a deleted cell, so an array of cleared memory would appear as a set of deleted records.

      That feature was removed in a few months in favor of skiplist inserts (see commit bae4cd52b0b72100714104eb2895b779783dcb5a), but the code to check for a WT_COL page offset of 0 was left in place.

      I believe it can be removed.

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            keith.bostic@mongodb.com Keith Bostic (Inactive)
            keith.bostic@mongodb.com Keith Bostic (Inactive)
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            Dates

              Created:
              Updated:
              Resolved: