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  1. Spark
  2. SPARK-16026 Cost-based Optimizer Framework
  3. SPARK-17073

generate basic stats for column

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.0.0
    • 2.1.0
    • Optimizer, SQL
    • None

    Description

      For a specified column, we need to generate basic stats including max, min, number of nulls, number of distinct values, max column length, average column length.

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        Issue Links

        blocks

        Sub-task - The sub-task of the issue SPARK-17642 Support DESC FORMATTED TABLE COLUMN command to show column-level statistics

        • Major - Major loss of function.
        • Resolved

        Sub-task - The sub-task of the issue SPARK-17282 Implement ALTER TABLE UPDATE STATISTICS SET

        • Major - Major loss of function.
        • Closed
        links to

        Pull request #15090 [Github] Pull Request #15090 (wzhfy)

        Pull request #15360 [Github] Pull Request #15360 (wzhfy)

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            ZenWzh Zhenhua Wang Assign to me
            ron8hu Ron Hu
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              Updated:
              Resolved:

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