Arnaud Lesauvage <[email protected]> writes:
> I just came accross this trying to upgrade my server from 8.4.8 to 9.3.4 :
> SELECT substring('²' FROM E'\\d');
> 8.4 : NULL
> 9.3 : "²"
> Am I correct to expect NULL in this case ?
Not necessarily. \d will match any character that iswdigit() returns true
for. It looks like your new server is using a locale that considers "²"
to be a digit.
regards, tom lane
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