[jira] [Created] (ATLAS-1207) Dataset exists query in lineage APIs takes longer

[Shwetha G S (JIRA)]

Shwetha G S created ATLAS-1207:
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             Summary: Dataset exists query in lineage APIs takes longer
                 Key: ATLAS-1207
                 URL: https://issues.apache.org/jira/browse/ATLAS-1207
             Project: Atlas
          Issue Type: Bug
            Reporter: Sharmadha Sainath
            Assignee: Shwetha G S
             Fix For: 0.8-incubating


Hive_column now extends DataSet. Lineage Service uses the DSL query Dataset 
where __guid = <id> which maps to the gremlin query g.V().has(supertype, 
Dataset).has(__guid, <id>). Since the first filter is on type which returns 
many vertices, this query is slow. Supertypes is a list property and not sure 
how adding combined index will work. This can be replaced with graph query 
directly like 
{code}
titanGraph.query().has(Constants.GUID_PROPERTY_KEY, guid)
                          .has(Constants.SUPER_TYPES_PROPERTY_KEY, 
AtlasClient.DATA_SET_SUPER_TYPE)
{code}

Thanks [~ssainath] for helping to test this



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