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Update for pattern comprehensions #1504

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Update for pattern comprehensions #1504

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4 changes: 4 additions & 0 deletions pages/querying/expressions.mdx
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Expand Up @@ -243,6 +243,10 @@ RETURN actor.name, years, titles;
```
The whole predicate, including the `WHERE` keyword, is optional and may be omitted.

Pattern comprehensions can be nested, for example `[(n)-->(m) | [(m)-->(x) | x.id]]` returns a list of lists.

You can also bind the matched path to a variable using the syntax `[path = (a)-[r]->(b) | length(path)]`.

### Pattern comprehension in `WHERE` clause

Pattern comprehension can also be combined with comprehension constructs inside the `WHERE` clause.
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