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  1. Hive
  2. HIVE-9897

Issue a warning when using an existing table/view name as an alias in a with statement.

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 0.13.1
    • Fix Version/s: None
    • Component/s: Hive
    • Labels:
      None
    • Environment:

      cdh5.3.0

      Description

      Consider the following query:

      WITH
      table_a AS (
          SELECT
              'johndoe' AS name
          FROM
              my_table
      )
      
      SELECT
          DISTINCT name
      FROM
          table_a;
      

      Observation:

      If a table or a view with name `table_a` exists it is used instead of the one defined in the WITH statement.

      Expectation:

      As the expectation is ambiguous (using the alias in the WITH statement vs. using the existing table) issuing a warning when using a existing name in a WITH statement is recommended.

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              • Assignee:
                pxiong Pengcheng Xiong
                Reporter:
                infinite_monkey Mario Konschake
              • Votes:
                2 Vote for this issue
                Watchers:
                8 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: