Hive XOR函数用于字符串？

Question

I want to select a data either A column equals 'X' or B column equals 'X' but not both of them equal 'X'. Is there such a function in HQL?

Answer 1

Try below query instead of tablename use your tablename

    SELECT * FROM ( 
       SELECT
        CASE WHEN COLUMNA='X' AND COLUMNB<>'X' THEN COLUMNA 
        CASE WHEN COLUMNA<>'X' AND COLUMNB='X' THEN COLUMNB 
        END AS XORCOMBO
        FROM TABLENAME
                 )X
WHERE XORCOMBO IS NOT NULL

Answer 2

Hive does have bitwise XOR arithmetic operator. It can be used on any numeric data type for ex. A ^ B .

More details can be found in hive official documentation: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-ArithmeticOperators