Details
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Improvement
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Status: Resolved
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Major
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Resolution: Fixed
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8.0.1
Description
In some situations, may request an access method to get binary or sting likes array one or some continuous bytes , for example start 1 end 3 step 1, the two bytes, it seems like "binary_replace_slice " function, provide byte and code two measurement unit
application case:
here, I can give one example to descirbe why need a function to extract binary in byte unit:
In distribute database, data has distribute policy and relatived hash algorithm for different data type, here we just discuss string-like and binary type, the hash algorithm need detach string-like or binary in bytes to calculating, for example , take 1-4 byte cast to integer and shift-left 16 bits, then take 5-6byte cast to integer and the result from last step, and so on, the 'utf8_slice_codeunits' function can partly meet the require if all are ascii, but if the string-like contain chinese, one chinese may occupied three bytes, start 1 to end 3, three utf8 character
may take nine bytes, but it not meet the hash algorithm, it only need 3 bytes, so if provide a function but not cast, the same function arguments like 'utf8_slice_codeunits', it may called 'binary_slice_byteunit'
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