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well in this case they only really talk about the one function so i.e. is not incorrect.

• paulddraper 8y ago
  They say "Functions" though.
  • abundant 8y ago
    Here one would read “that is” as something like “specifically”.
    • Zalastax 8y ago
      But that's not how one should read "that is". The author should have used "e.g." here, no question. Using "i.e." would imply that there exists only one nondeterministic function in MySQL, which is not the case.
    • paulddraper 8y ago
      Yeah, or I'd say "namely"