MariaDB [anr]> select case 'X' when null then 1 when 'X' then 2 else 3 end;
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+------------------------------------------------------+
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| case 'X' when null then 1 when 'X' then 2 else 3 end |
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+------------------------------------------------------+
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| 2 |
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+------------------------------------------------------+
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1 row in set (0.000 sec)
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|
MariaDB [anr]> select case 'X' when 1/0 then 1 when 'X' then 2 else 3 end;
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+-----------------------------------------------------+
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| case 'X' when 1/0 then 1 when 'X' then 2 else 3 end |
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+-----------------------------------------------------+
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| 3 |
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+-----------------------------------------------------+
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1 row in set, 1 warning (0.000 sec)
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