Is it possible to use a negative length for a MySQL index? If so, does it work the same way as using a negative value when calling PHP’s substring function?
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Is it possible to use a negative length for a MySQL index? If so, does it work the same way as using a negative value when calling PHP’s substring function?
According to CREATE INDEX Syntax:
No exception is mentioned for negative values. So my guess is, it is not defined how MySQL behaves when a negative length is given.