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[SOLVED] How to pass a hexadecimal value in a binary mask?
Posted by: Yann Kechichian ()
Date: March 01, 2011 04:47AM

Hi everybody,

Here what I noticed when I try to apply a binary mask to a column :

SELECT
HEX('abc'),
0x616263,
HEX('abc') >> 8 & 255,
0x616263 >> 8 & 255

displays this result :

616263
abc
103
98

We can see the result is 98 for this command : 0x616263 >> 8 & 255
but 103 for this one : HEX('abc') >> 8 & 255

If I understood the documentation, this is because the HEX() function returns the hexadecimal representation of the value. Thus, in reality, this is the integer type value 616263 which is passed to the mask.

Basically, I would like to get each character from a column field. This problem should be resolved if I should have to pass a string, for example :

x'616263' >> 8 & 255 returns the correct value (98).

But I didn't find the solution to do this with a column field from the database.

Does anyone know how to pass a real hexadecimal value (and not the representation) to the mask ?

Thanks a lot for your answers.
Yann



Edited 4 time(s). Last edit at 03/02/2011 05:14AM by Yann Kechichian.

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[SOLVED] How to pass a hexadecimal value in a binary mask? 3248 Yann Kechichian 03/01/2011 04:47AM
Re: How to pass a hexadecimal value in a binary mask? 2020 Yann Kechichian 03/02/2011 05:11AM


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