> [Question about slice behavior from me] Bug?  Misconception on my part?

The answer is misconception; I interpreted the behavior of get_slice to be 
columns between X and Y, in ascending or descending depending on the "reversed" 
flag, but it's a little different

start = X, end = Y, reversed = false -->
  { col | X <= col <= Y }

start = X, end = Y, reversed = true -->
  { col | Y <= col <= X }

To be fair, this is more or less what the wiki doc says, although I don't think 
that the analogy with SQL's ASC/DESC is accurate.

-- Paul

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