[HIVE-4258] Log logical plan tree for debugging

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: Diagnosability
• Hadoop Flags: Reviewed
• Assignee: Navis Ryu
• Reporter: Navis Ryu
• Created: 29/Mar/13 10:12
• Updated: 16/May/13 21:10
• Resolved: 29/Mar/13 16:56

Description

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

 
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]