Re: Row pattern recognition

Hi Tatsuo,

Attached are two more incremental patches (nocfbot-0011, nocfbot-0012)
on top of v43, continuing the nocfbot-0001..0010 series.

nocfbot-0011: Add RPR DEFINE expression cost to WindowAgg cost estimation

Revised version of your cost estimation patch [1]. Fixes the
`(char *)` cast and moves DEFINE cost outside the windowFuncs loop.

nocfbot-0012: Reject qualified column references in RPR DEFINE clause

Revised version of your qualified column reference patch [2].
Exposes `patternVarNames` via `ParseState.p_rpr_pattern_vars` to
distinguish pattern variable qualifiers ("not supported") from
FROM-clause range variable qualifiers ("not allowed").

Variables appearing only in DEFINE (not in PATTERN) are also
collected into `p_rpr_pattern_vars` so they get the "not supported"
message, but the RPR_VARID_MAX count check still applies only to
PATTERN variables.

[1]
https://www.postgresql.org/message-id/20260227.225456.33226875991025537.ishii@postgresql.org
[2]
https://www.postgresql.org/message-id/20260227.145539.1921177948671828231.ishii@postgresql.org

Attachment:
nocfbot-0011-define-cost.txt
nocfbot-0012-qualified-refs.txt

Best regards,
Henson