[jira] [Created] (HIVE-12615) Do not start spark session when only explain

[Nemon Lou (JIRA)]

Nemon Lou created HIVE-12615:
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             Summary: Do not start spark session when only explain 
                 Key: HIVE-12615
                 URL: https://issues.apache.org/jira/browse/HIVE-12615
             Project: Hive
          Issue Type: Improvement
    Affects Versions: 1.3.0, 2.1.0
            Reporter: Nemon Lou


When using beeline -e "set hive.execution.engine=spark;explain select count(*) 
from sometable",it's very slow due to starting of spark session on yarn.




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