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  1. MariaDB Server
  2. MDEV-24597

Explicit column name error in CTE of UNION

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    Description

      The bug described in MDEV-15478 is not fully resolved. When the CTE is used again with UNION in the main statement, it gives error #1054 - Unknown column 'col1' in 'field list'

      WITH cte (col1) AS
      		 
      (
      		 
        SELECT 1
      		 
        UNION
      		 
        SELECT 2
      		 
      )
      		 
      SELECT col1 FROM cte
      		 
      -- union statement added to example in MDEV-15478
      		 
      UNION
      		 
      SELECT col1 FROM cte

      This can currently be worked around with:

      WITH cte (col1) AS
      		 
      (
      		 
        SELECT 1 AS col1 -- alias required
      		 
        UNION
      		 
        SELECT 2
      		 
      )
      		 
      SELECT col1 FROM cte
      		 
      UNION
      		 
      SELECT col1 FROM cte

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          Bug - A problem which impairs or prevents the functions of the product. MDEV-15478 Explicit column name error in CTE of UNION

          • Major - Major loss of function.
          • Closed

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              igor Igor Babaev (Inactive)
              tarrin Tarrin Wills
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                Created:
                Updated:
                Resolved: