Backtracking real column names for EXPLAIN output
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Key: HIVE-2283
URL: https://issues.apache.org/jira/browse/HIVE-2283
Project: Hive
Issue Type: Improvement
Components: Query Processor
Affects Versions: 0.8.0
Reporter: Navis
Priority: Minor
GUI people suggested that showing real column names for result of EXPLAIN
statement would make customers feel more comfortable with HIVE. I agreed and
working on it.
a. current EXPLAIN
Select Operator
expressions:
expr: _col10
type: int
expr: _col17
type: string
Group By Operator
keys:
expr: _col0
type: int
expr: _col17
type: int
b. suggested EXPLAIN
Select Operator
expressions: _col10=t2.key_int1, _col17=upper(t1.key_int1),
_col22=t3.key_string2
Group By Operator
keys: _col10=t2.key_int1, _col17=upper(t1.key_int1)
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