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  1. Kudu
  2. KUDU-3495

TServer: Unexpected result of write with old schema.

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 1.14.0
    • 1.18.0
    • tserver
    • None

    Description

      For table test with two column a(primary key), b.

      If I do following operations in client side:

      1. openTable(test) to get a kudu table object KuduTable1 whose schema is (a, b)
      2. Add a column c to table test.
      3. openTable(test) to get another kudu table object KuduTable2 whose schema is (a, b, c)
      4. Insert 1 row  ("d", "e", "f") using KuduTable2
      5. Upsert 1 row  ("d", "g") using KuduTable1

      The expected result is ("d", "g", "f") since I hope to keep the value of column c.

      But the result i got was ("d", "g", NULL)

      After looking through the code, I think the original reason is that the isset_bitmap is not all 0 at start.

      So I initialize the bitmap like below:

      After this modification, the result is as my expect.

      So I wonder if it is a bug since normally a user does not want to change the column which he did not request to.

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        1. image-2023-07-25-18-56-27-790.png
          39 kB
          Song Jiacheng
        2. image-2023-07-25-18-54-29-354.png
          32 kB
          Song Jiacheng

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            Unassigned Unassigned
            Song Jiacheng Song Jiacheng
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            Dates

              Created:
              Updated:
              Resolved: