Provides a way to query data with the value of the Vertex property in a GraphQL query.

Now implementations in GraphQL need to know the starting Vertex ID to be able to query.

Suppose have the following user.

User {
  id: "daewon"
  age: 35
}

The query that fetch a friends of user 'daewon' is shown below. It works well.

  User(id: "daewon") { 
    friends { 
      id 
    } 
  }

This time, let's consider a query that fetch a friends who is older than 30 years old.

Below is the expected query.

Kakao {
  User(search: "age > 30") {
    id
    name
    friends {
      User {
        id
        name
      }
    }
  }
}

However, this feature is not available at this time.

Things to implement

• Must be able to use the properties of 'User' ServiceColumn as a parameter in 'search'
• Should be able to find vertices that match the properties defined in the above parameters(search).

Associated issues that must be preceded and handled

• Provide global index: https://issues.apache.org/jira/browse/S2GRAPH-151
• Refactor S2Query to specify index on getVertices: https://issues.apache.org/jira/browse/S2GRAPH-155