Liwei Lin created PARQUET-425:
---------------------------------
Summary: Fix the bug when predicate contains columns not specified
in prejection, to prevent filtering out data improperly
Key: PARQUET-425
URL: https://issues.apache.org/jira/browse/PARQUET-425
Project: Parquet
Issue Type: Bug
Components: parquet-mr
Affects Versions: 1.8.0, 1.8.1
Reporter: Liwei Lin
Assignee: Liwei Lin
Fix For: 1.9.0
As is reported in Parquet-427, data will be filtered out improperly under the
case where:
1. requested schema ∩ predicates ≠ ∅
2. (requested schema ∪ predicates) - file schema ＝ ∅
To give an example:
data:
a: int b: int
1 1
2 2
3 3
file schema: a,b, requested schema: a, and predicate: b = 1
we should get:
a: int
1
but we'll end up get nothing, which is wrong.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
