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  1. MariaDB Server
  2. MDEV-17607

DATE(COALESCE(year_column)) returns a wrong result

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    Description

      CREATE OR REPLACE TABLE t1 (a YEAR);
      		 
      INSERT INTO t1 VALUES (NULL);
      		 
      SELECT COALESCE(a), DATE(COALESCE(a)) FROM t1;


      +-------------+-------------------+
      		 
      | COALESCE(a) | DATE(COALESCE(a)) |
      		 
      +-------------+-------------------+
      		 
      |        NULL | 0000-00-00        |
      		 
      +-------------+-------------------+

      The result for DATE(COALESCE(a)) is wrong. It should be NULL.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-16926 CAST(COALESCE(year_field)) returns wrong value

          • Major - Major loss of function.
          • Closed

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              bar Alexander Barkov
              bar Alexander Barkov
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                Created:
                Updated:
                Resolved:

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