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database returns null as -2147483648

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Azura Hashim
Azura Hashim 2017-8-13
评论： Azura Hashim 2017-8-14
When I executed a query using MySQL console null values returned correctly. But when I queried the same data using database function in Matlab all the null values were returned as -2147483648. Has anyone encountered this?
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Walter Roberson
Walter Roberson 2017-8-13
Looks like -2^31 which is the most negative possible 32 bit integer. What is class() of the returned data? If it is integral then there would be no representation available in the data type to signal missing. Floating point numbers have NaN designed in, but integral data types do not.
Azura Hashim
Azura Hashim 2017-8-14
It is an integer class. Thank you. I didn't realise there is not a NaN equivalent for integers.

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