Ayush Saxena created HIVE-29544:
-----------------------------------
Summary: Fix Vectorized Parquet reading Struct columns with all
fields null
Key: HIVE-29544
URL: https://issues.apache.org/jira/browse/HIVE-29544
Project: Hive
Issue Type: Bug
Reporter: Ayush Saxena
Assignee: Ayush Saxena
If in vectorized mode. The parquet file has a struct field which has all the
fields null, reading it returns the entire struct as null, instead the values
as null for the struct.
Repro
{noformat}
create table test (id int, st struct<x:int, y:int>) stored as parquet;
insert into test values (1, named_struct('x', CAST(NULL AS INT), 'y', CAST(NULL
AS INT)));
{noformat}
With vectorization on:
{noformat}
select * from test;
+----------+----------+
| test.id | test.st |
+----------+----------+
| 1 | NULL |
+----------+----------+
{noformat}
With vectorization off
{noformat}
select * from test;
+----------+----------------------+
| test.id | test.st |
+----------+----------------------+
| 1 | {"x":null,"y":null} |
+----------+----------------------+
{noformat}
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