`Exists`

Cypher® EXISTS subqueries can be created with new Cypher.Exists(). To do this, a valid query needs to be passed to Exists.

Note that count subqueries can also be used as predicates in WHERE clauses, for example:

const subquery = new Cypher.Match(new Cypher.Node({ labels: ["Movie"] })).return("*");

const existsExpr = new Cypher.Exists(subquery);
const match = new Cypher.Match(new Cypher.Node()).where(existsExpr).return("*");

MATCH (this0)
WHERE EXISTS {
    MATCH (this1:Movie)
    RETURN *
}
RETURN *

Simple `Exists` subqueries

Instead of a Clause, a Pattern can be passed directly to a Exists subquery:

const existsExpr = new Cypher.Exists(new Cypher.Pattern(new Cypher.Node(), { labels: ["Movie"] }))

const match = new Cypher.Match(new Cypher.Node()).where(existsExpr).return("*");

MATCH (this0)
WHERE EXISTS {
    (this1:Movie)
}
RETURN *