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Explore subgraphs

This topic introduces how to explore subgraphs in NebulaGraph Explorer.

Prerequisites

An exploration is created. For more information, see Manage explorations.

Query nodes

  1. In the top navigation bar, click the EXPLORATION tab.
  2. On the Exploration List page, click the exploration that you want to use.
  3. On the left-side pane, click the Graph Query icon.

  4. On the expanded pane that appears, click Query Nodes and specify the following information:

    • Node Type: Select the type of nodes that you want to query.
    • Property: Select the property of the node type.
    • Value: Enter the value of the property. To query multiple nodes, specify multiple values separated by newlines.

  5. Click Query. The nodes that meet the query conditions are selected in highlight on the canvas.

  6. To explore further, select one or more nodes on the canvas and right-click to perform the following operations:

    • Find Neighbors: Find the neighbors of the selected nodes.
    • Style: Change the style of the selected nodes.
    • Invert Selection: Invert the selection of the nodes.
    • Dismiss: Dismiss the selected nodes so that they are grayed out on the canvas.

    Query node

Explore relations

  1. In the top navigation bar, click the EXPLORATION tab.
  2. On the Exploration List page, click the exploration that you want to use.
  3. On the left-side pane, click the Graph Query icon.

  4. On the expanded pane that appears, click Explore Relation and specify the following information:

    • Select Node: Select one or more nodes that you want to explore on the canvas.
    • Edge Type: Select the types of edges that connect the nodes from the drop-down list.
    • Direction: Select the direction of the edges from the drop-down list.
    • Step: Specify the number of steps to explore. The following options are available:
      • Fixed: Specify a fixed number of steps.
      • Range: Specify a range of steps.

  5. Click Query. The nodes and edges that meet the query conditions are selected in highlight on the canvas.

    Explore relations

Query paths

  1. In the top navigation bar, click the EXPLORATION tab.
  2. On the Exploration List page, click the exploration that you want to use.
  3. On the left-side pane, click the Graph Query icon.

  4. On the expanded pane that appears, click Query Path and specify the following information:

    • Source Node: Select the source node of the path on the canvas.
    • Destination Node: Select the destination node of the path on the canvas.
    • Edge Type: Select the types of edges that are allowed in the path from the drop-down list.
    • Direction: Select the direction of the edges that are allowed in the path from the drop-down list.
    • Path Search Prefix: Select the path search prefix. The following options are available:
      • All: Query all paths that match the pattern.
      • Any One: Query any path that matches the pattern.
      • All Shortest: Query all the shortest paths that match the pattern.
      • Any Shortest: Query any shortest path that matches the pattern.
    • Path Mode: Select the path mode from the drop-down list. The following options are available:
      • WALK: Applies no filtering to the paths. This is the default path mode.
      • TRAIL: Filters out paths with repeated edges.
      • ACYCLIC: Filters out paths with repeated nodes.
      • SIMPLE: Filters out paths with repeated nodes unless these nodes are either the first or last nodes in the path.
    • Step: Specify the number of steps to explore. The following options are available:
      • Fixed: Specify a fixed number of steps.
      • Range: Specify a range of steps.

  5. Click Query. The paths that meet the query conditions are selected in highlight on the canvas.

    Query path