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  1. MariaDB Server
  2. MDEV-37683

incorrect results for NOT operator on DATE_FORMAT with invalid arguments

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Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.6, 10.11, 11.4, 12.1(EOL), 11.8, 12.0.2
    • 10.11, 11.4, 11.8
    • Optimizer
    • None

    Description

      The logical NOT operator produces inconsistent and incorrect results when applied to the DATE_FORMAT function if the function is given invalid (non-date/string) arguments.

      CREATE TABLE t80 (c2 DECIMAL(10,10));
      		 
      INSERT INTO t80 (c2) VALUES (0.1);
      		 
       
      		 
      select not DATE_FORMAT(c2, c2) FROM t80;
      		 
      -- return 0.1
      		 
      select not DATE_FORMAT(c2, c2) FROM t80;
      		 
      -- return 0
      		 
      select not(not DATE_FORMAT(c2, c2)) FROM t80;
      		 
      -- return 0 ,expected 1

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-36440 Double negation is treated as original value in WHERE clause

          • Major - Major loss of function.
          • Confirmed

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              psergei Sergei Petrunia
              zhouhongtao zzz
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              Dates

                Created:
                Updated:

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