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  1. MariaDB Server
  2. MDEV-18228

Odd behavior of numeric comparison in MTR

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    Description

      The main concern here is that the comparison might be used in regression tests, and the wrong behavior will cause false negatives – that is, regressions might stay unnoticed.

      Run the test as 

      CHECK_NUMBER=<number of your choosing> perl ./mtr testname

      MTR test

      		 
      if ($CHECK_NUMBER < 1)
      		 
      {
      		 
        echo # $CHECK_NUMBER is less than 1;
      		 
      }
      		 
      if ($CHECK_NUMBER > 1)
      		 
      {
      		 
        echo # $CHECK_NUMBER is greater than 1;
      		 
      }
      		 
      if ($CHECK_NUMBER == 1)
      		 
      {
      		 
        echo # $CHECK_NUMBER is equal to 1;
      		 
      }

      Results (on 10.2, but they appear the same everywhere):

      # 2147483647 is greater than 1
      		 
      # 2147483648 is less than 1
      		 
      # 100000000000 is greater than 1
      		 
      # 1000000000000 is less than 1

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            Unassigned Unassigned
            elenst Elena Stepanova
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            Dates

              Created:
              Updated:

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