gregfelice opened a new pull request, #364: URL: https://github.com/apache/age-website/pull/364
**What** — Documents that pattern expressions (path patterns such as `(a)-[:KNOWS]->(:Person)`) can be returned directly from a `RETURN`/`WITH` projection, not only used as `WHERE` predicates. Adds a worked example to the RETURN reference with verified output, plus a performance note. **Why** — Follow-up to the review of apache/age#2360. The reviewer asked that the per-row `EXISTS`-subquery cost of pattern expressions in projection contexts be discoverable from the Cypher reference, not just the PR history. **Performance note** — A pattern expression is evaluated as an `EXISTS` subquery, once per result row in a projection, so cost scales with rows projected. The note makes only this mechanically-grounded claim. **Depends on** apache/age#2360 (the projection capability); should not merge before it. **Verification** — Example output generated against a PG18 build of the #2360 branch using the canonical doc graph (`intro/aggregation.md`). -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
