Tom Lane wrote:

While all this reasoning is perfectly OK on its own terms, it ignores
the precedents of SQL identifier handling.  Maybe we should revisit the
question of whether the labels are identifiers.


If we do that can we still cache the values in the syscache? My impression from what you and TomD said was that it would be at least more difficult. If it's possible I'm all in favor.

(Side note: ISTM there is a pretty good case to move the truncation code from the lexer to the parser where it can be invoked according to context. Maybe something to think about next cycle.).



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