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  1. Cassandra
  2. CASSANDRA-13138

SASI tries to fetch an extra page when resultset size is same size as page size

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Normal
    • Resolution: Unresolved
    • Fix Version/s: None
    • Component/s: Feature/SASI
    • Labels:
      None
    • Severity:
      Normal

      Description

      For example, in a dataset that would return 10 rows, SASI would try (and return an empty page) to fetch the next page, while filtering and 2i will return results correctly:

       pk | ck1 | ck2 | reg1 | reg2 | reg3
      ----+-----+-----+------+------+------
        6 |   5 |   5 |    5 |    5 |   10
        7 |   5 |   5 |    5 |    5 |   10
        9 |   5 |   5 |    5 |    5 |   10
        4 |   5 |   5 |    5 |    5 |   10
        3 |   5 |   5 |    5 |    5 |   10
        5 |   5 |   5 |    5 |    5 |   10
        0 |   5 |   5 |    5 |    5 |   10
        8 |   5 |   5 |    5 |    5 |   10
        2 |   5 |   5 |    5 |    5 |   10
        1 |   5 |   5 |    5 |    5 |   10
      
      ---MORE---
      (10 rows)
      

      (that -MORE- shouldn't have been there)

      This might be an inherent limitation, although even if it is we can opt out for fetching limit+1 if the data limits aren't exhausted. Although it seems that there should be a solution for it.

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            • Assignee:
              ifesdjeen Alex Petrov
              Reporter:
              ifesdjeen Alex Petrov
              Authors:
              Alex Petrov
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              Dates

              • Created:
                Updated: