Hello All, PostgreSQL supports "frame exclusion" in window function, e.g.: "SELECT sum(x) OVER (PARTITION BY y ORDER BY z ROWS BETWEEN UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING EXCLUDE CURRENT ROW) from t", (you can see here <https://www.postgresql.org/docs/current/sql-expressions.html#SYNTAX-WINDOW-FUNCTIONS>) which let you ignore some rows from the selected scope. Calcite however does not support it. Can I add it to the parser? Do we use conformance for such cases or other mechanisms?
Thanks, Itiel
