Re: Row pattern recognition

Acording to ISO/IEC 9075-2:2016 "4.21.2 Row pattern navigation operations",
  <row pattern navigation operation> evaluates a <value expression> VE  in a row NR, which may be different than current row CR.

From this I think PREV(col + 1) should be interpreted as:

1. go to the previous row.
2. evaluate "col + 1" at the current row (that was previous row).
3. return the result.

If my understanding is correct, prev(price + 1) has the same meaning
as prev(price) + 1.

This is how I read the specification also.

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Vik Fearing