On 22/10/2024 12:19, Tatsuo Ishii wrote:
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.
--
Vik Fearing
