[GENERAL] About "ERROR: must be *superuser* to COPY to or from a file"

[Emi Lu]

Greetings,

I met a question about Copy. I tried to run :
  copy test(studid) from '/myownDIR/a.txt';
But I got an error as the following:
ERROR:  must be *superuser* to COPY to or from a file

May I know is it possible that instead of supervuser, regular users are 
able to use COPY as well?


Thanks a lot and Good weekend,
Emi



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