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tbl.pack() question

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    tbl.pack() question

    if I am correct, tbl.pack() also updates all the indexes. Is this correct?
    Cole Custom Programming - Terrell, Texas
    972 524 8714
    [email protected]

    ____________________
    "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

    #2
    RE: tbl.pack() question

    Hi Martin,

    Since this has been sitting here like an orphan let me say that it may not be so. My reasoning is that since deleted records do not have index key values removing them might not change the indexes at all. So why rebuild.

    But I don't know that indexes are not rebuilt anyway.

    Bill
    Bill Hanigsberg

    Comment


      #3
      RE: tbl.pack() question

      Hi Bill, well this is run from a "System Maintenance" button that does a number of things. One objective, of course, is to remove deleted records and rebuild indexes. I have been doing this separately, but since "database pack" not only deletes records but also rebuilds everything, including the dictionaries, (I think this is correct, I got to wondering if I was rebuilding the indexes unnecessarily.
      Cole Custom Programming - Terrell, Texas
      972 524 8714
      [email protected]

      ____________________
      "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

      Comment


        #4
        RE: tbl.pack() question

        Packing a table will definitely update the indexes if there are any deleted records to be removed. The index has to account for the record positions used even by deleted records.

        If my memory is any good (and that is highly questionable) I believe different versions/builds of A5 have handled the "pack a table with no deleted records" differently. I believe some forced an index update (v4.5 does) and some did not.

        It's easy enough to test. Just copy a table, delete the indexes, then pack it and time the pack. Add one index (I prefer to use a complex one just to make sure it takes measureable time) and pack it again. Since it was already packed, a longer pack time will mean that it is rebuilding the index.

        Comment


          #5
          RE: tbl.pack() question

          thank's Cal - I will test. If the pack(even if no deleted records) also rebuilds all the indexes for that file, then it will save me another "production update" routine and time.
          Cole Custom Programming - Terrell, Texas
          972 524 8714
          [email protected]

          ____________________
          "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

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