Xuefu Zhang created HIVE-14885:
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Summary: Support PPD for nested columns
Key: HIVE-14885
URL: https://issues.apache.org/jira/browse/HIVE-14885
Project: Hive
Issue Type: Improvement
Components: Logical Optimizer, Serializers/Deserializers
Affects Versions: 2.1.0
Reporter: Xuefu Zhang
It looks like that PPD doesn't work for nested columns, at least not for
Parquet. For a given schema
{code}
hive> desc nested;
OK
a int
b string
c struct<d:int,e:string>
{code}
PPD works for a query like
{code}
select * from nested where a=1;
{code}
while NOT for
{code}
select * from nested where c.d=2;
{code}
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