2009/11/15 Andrew Gierth <and...@tao11.riddles.org.uk>: > My thinking is that the executor definitely shouldn't be relying on it > being a specific node type, but should just ExecEvalExpr it on the > first call and store the result; then you don't have to know whether > it's a Const or Param node or a more complex expression.
Yeah, so that we allow something like ROWS BETWEEN 1 + $1 PRECEDING AND ... And to support RANGE BETWEEN n PRECEDING ..., we should make datum to add or to subtract from current value on initial call anyway. Regards, -- Hitoshi Harada -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
