Navis created HIVE-4258:
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Summary: Log logical plan tree for debugging
Key: HIVE-4258
URL: https://issues.apache.org/jira/browse/HIVE-4258
Project: Hive
Issue Type: Improvement
Components: Diagnosability
Reporter: Navis
Assignee: Navis
Priority: Trivial
Debugging or implementing optimizer, knowing the shape of logical plan helps
general progress of it.
For example,
select count(val) from (select a.key as key, b.value as array_val from src a
join array_valued_src b on a.key=b.key) i lateral view explode (array_val) c as
val
<noformat>
TS[1]-RS[2]-JOIN[4]-SEL[5]-LVF[6]-SEL[7]-LVJ[10]-SEL[11]-GBY[12]-RS[13]-GBY[14]-SEL[15]-FS[16]
-SEL[8]-UDTF[9]-LVJ[10]
TS[0]-RS[3]-JOIN[4]
<noformat>
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