The WHERE gets tied to the OPTIONAL MATCH.
If you want the WHERE to apply to the whole thing you need to end the
OPTIONAL with a WITH.
Something like:
MATCH
(n1:Label1)
WHERE
(n1.propertyA = {param1})
OPTIONAL MATCH
(n1)<-[r:rel1]-(n2:Label2)
WITH n1, r, n2
WHERE
(r IS NULL OR n2.propertyB = {param2})
RETURN
n1;
On Monday, February 1, 2016 at 5:27:10 PM UTC-6, matias...@brinqa.com wrote:
>
> One more thing to add is that what I was doing for previous versions of
> Neo4j and it was working (but it's not allowed anymore) is the following:
>
> START
>n1=({node})
> MATCH
>n1<-[r?:rel1]-n2
> WHERE
>n1.propertyA = {param1} AND (r is null OR n2.propertyB! = {param2})
> RETURN
> n1;
>
> Thanks,
> Matias.
>
> On Monday, February 1, 2016 at 8:10:29 PM UTC-3, matias...@brinqa.com wrote:
>
> Hi all,
>>
>> I'm having a hard time building a query with optional relationship using
>> Neo4j 2.3.2.
>>
>> My query is something like this:
>>
>> MATCH
>> (n1:Label1)
>> WHERE
>> (n1.propertyA = {param1})
>> OPTIONAL MATCH
>> (n1)<-[r:rel1]-(n2:Label2)
>> WHERE
>> (NOT (n1)<-[r:rel1]-(n2) OR n2.propertyB = {param2})
>> RETURN
>>
> n1;
>>
>> My intention is to return all n1 objets that don't have a relationship to
>> n2 or if they have a relationship check for propertyB and filter by that.
>> What I'm getting is all the n1 even when rel1 exists and propertyB !=
>> {param2}
>>
>> Anyone sees what's the issue in this query? I can't see it...
>>
>> Thanks,
>> Matias.
>>
>>
>>
>>
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