Hi, I’m trying to perform subgraph matching in DQL, where a query counts the number of times a subgraph matches some pattern. For example, consider a social network in which people makes friendships and comment on each other’s posts. (Example graph below). I want to count the number of times a per…

I guess dgraph doesn’t support this, even does, it well be an expensive cost. in my opinion, you should add a redundant predicate to make it filterable , perhaps you should present you schema definition , I am not sure what’s you want to do .

seems like you would be able to do this pretty easily with using vars as filters: query { me as var(func: type(Person)) @filter(eq(name,"1")) var(func: uid(me)) { knows { //has_creator isnt in your sample RDF but should have @reverse index as well // postsFromFriends is a variab…

Hi @iluminae Thanks for your response and pointing out I’d missed the has_creator edges from the sample RDF - I will amend this. You start your query by filtering for the person with name 1 and then matching the pattern from there. Doing so would miss matches of the pattern that start from, for ex…

Hi @littleone , I’m more interested in whether such a query is possible rather than the associated costs, for now, anyway :slight_smile: Thanks for the pointers, I’ll add the schema to the sample graph. Jack

[image] jackwaudby: Is there a way to write a DQL query to get all matches of the pattern? Without having to manually filter for a specific persons each time? I don’t believe so right now without having [image] Feature: Add foreach() function …

Sorry I was working from this sentence: [image] jackwaudby: I want to count the number of times a person has replied to a post made by a friend (pattern attached). So starting with a “person”, whom I assume you knew what single person you wanted to start with. In dgraph and more generally gr…

Labelled subgraph matching in DQL

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verneleem (Verneleem) March 15, 2021, 5:14pm 6

I don’t believe so right now without having

Maybe you could give your use case and feedback on that topic to give it more life.

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Labelled subgraph matching in DQL

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