Richard Klingler <richard(at)klingler(dot)net> writes:
> Took some time until I could try out this...
> But as soon I want to create the fcuntion based index it tells me:
> Error : ERROR: functions in index expression must be marked IMMUTABLE
FWIW, this example works fine for me. Maybe you have some weird
user-defined version of substr() or ~ that isn't immutable?
regards, tom lane
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