Miles Hong created ASTERIXDB-2863:
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             Summary: Interactive Query Plan Viewer
                 Key: ASTERIXDB-2863
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2863
             Project: Apache AsterixDB
          Issue Type: New Feature
          Components: DASH- Dashboard
            Reporter: Miles Hong


Decided to abandon previous query plan viewer as it did not support query plans 
that were directed acyclic graphs (DAG). We will utilize 
[ngx-graph|https://swimlane.github.io/ngx-graph/] library in order to display 
an interactive query plan that supports DAGs.

Features:
 * Can swap between Bottom to Top and Top to Bottom plan orientations
 * Colored nodes (by operator)
 * Zoom out to fit whole plan
 * Zoom and drag through the plan
 * Traverse the operators or jump to nodes in a Depth First Search (DFS) fashion
 * Detailed mode (contains more information per node)
 ** Search using string match
 ** By variables navigation
 *** Jump to and from variable declaration
 * Clear all selections and reset the interactive plan



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