Jan Posiadała

I would add Idea 0: "Take no action" - as the semantic of WHERE tied to OPTIONAL MATCH is strict (and analogous to SQL outer join). Furthermore, everything might change...

I have checked queries you had posted - the results are expectedly accordant with Cypher's semantic, because of match clause definitions corresponding to 1-4 formulas that you had pasted: ```Prolog...

The ambiguity sensitive mode has been switched on in Cypher.PL executable specification. As the source of ambiguity in openCyper is generally reducing semantics of unordered set (of matches) to semantics...

### Option 3 The solution in the option lies in replacing aggregation function call by the neutral element of the operator which binds aggregation. Replacement should be applied in mixed...

We have published a paper on it in 2019: https://dl.acm.org/doi/10.1145/3315507.3330196 I was sure there is an open access to the paper, but it seems it's not. Please let me know...

@Lojjs I have executed the query in default configuration on http://console.neo4j.org. Error occurs in case of both default and empty database. I am sure this a bug, but there is...

### AS IS: Cypher 9 Each Cypher 9 query is a juxtaposition of its clauses and each clause is a function transforming a bag of environments to bag of environments...