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From fhueske <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-2785] [gelly] implements fromCsvReader ...
Date Wed, 07 Oct 2015 11:13:51 GMT
Github user fhueske commented on a diff in the pull request:

    --- Diff: docs/libs/gelly_guide.md ---
    @@ -194,6 +194,29 @@ val edgeTuples = env.readCsvFile[String, String, Double]("path/to/edge/input")
     val graph = Graph.fromTupleDataSet(vertexTuples, edgeTuples, env)
     {% endhighlight %}
    +* from a CSV file of Edge data and an optional CSV file of Vertex data.
    +In this case, Gelly will convert each row from the Edge CSV file to an `Edge`, where
the first field will be the source ID, the second field will be the target ID and the third
field (if present) will be the edge value. The parameter `readVertices` defines whether vertex
data are provided. If `readVertices` is set to `true`, then `pathVertices` must be specified.
In this case, each row from the Vertex CSV file will be converted to a `Vertex`, where the
first field will be the vertex ID and the second field will be the vertex value. If `readVertices`
is set to false, then Vertex data will be ignored and vertices will be automatically created
from the edges input.
    +If the edges have no associated value, set the `hasEdgeValues` parameter to `false`.
    --- End diff --
    Move this sentence after "... (if present) will be the edge value."?

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