[GitHub] [incubator-doris] chenhao7253886 opened a new issue #1492: NULL's operator "<=>" get wrong result

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chenhao7253886 opened a new issue #1492: NULL's operator "<=>" get wrong result
URL: https://github.com/apache/incubator-doris/issues/1492
 
 
   now ,  the result of comparing null with other value by operator "<=>" is wrong, for example:
   mysql> select null <=> null;
   +-------------+
   | NULL = NULL |
   +-------------+
   |        NULL |
   +-------------+
   1 row in set (0.00 sec)
   the result is wrong, the right result is:
   mysql> select null <=> null;
   +-------------+
   | NULL = NULL |
   +-------------+
   |           1 |
   +-------------+
   1 row in set (0.01 sec)
   Operator "<=>" is safe for null's comparing，so it will return 1 or 0.

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