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tidbitmap.c

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    • Tom Lane's avatar
      f1f21b2d
      Fix incorrect loop counts in tidbitmap.c. · f1f21b2d
      Tom Lane authored
      A couple of places that should have been iterating over WORDS_PER_CHUNK
      words were iterating over WORDS_PER_PAGE words instead.  This thinko
      accidentally failed to fail, because (at least on common architectures
      with default BLCKSZ) WORDS_PER_CHUNK is a bit less than WORDS_PER_PAGE,
      and the extra words being looked at were always zero so nothing happened.
      Still, it's a bug waiting to happen if anybody ever fools with the
      parameters affecting TIDBitmap sizes, and it's a small waste of cycles
      too.  So back-patch to all active branches.
      
      Etsuro Fujita
      f1f21b2d
      History
      Fix incorrect loop counts in tidbitmap.c.
      Tom Lane authored
      A couple of places that should have been iterating over WORDS_PER_CHUNK
      words were iterating over WORDS_PER_PAGE words instead.  This thinko
      accidentally failed to fail, because (at least on common architectures
      with default BLCKSZ) WORDS_PER_CHUNK is a bit less than WORDS_PER_PAGE,
      and the extra words being looked at were always zero so nothing happened.
      Still, it's a bug waiting to happen if anybody ever fools with the
      parameters affecting TIDBitmap sizes, and it's a small waste of cycles
      too.  So back-patch to all active branches.
      
      Etsuro Fujita
    tidbitmap.c 28.10 KiB