Jihoon Son created TAJO-483:
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Summary: Add getParentCount(), getParents(), getParent() functions
to DirectedGraph
Key: TAJO-483
URL: https://issues.apache.org/jira/browse/TAJO-483
Project: Tajo
Issue Type: Improvement
Affects Versions: 0.8-incubating
Reporter: Jihoon Son
Assignee: Jihoon Son
See the title.
In the current implementation, DirectedGraph provides getParent() which assumes
that there is only one parent. However, multiple parents should be supported in
DirectedGraph.
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