[
https://issues.apache.org/jira/browse/PARQUET-2244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yujiang Zhong updated PARQUET-2244:
-----------------------------------
Description:
Dictionary filter may skip row-groups incorrectly when evaluating `notIn` on
optional columns with null values. Here is an example:
Say there is a optional column `c1` with all pages dict encoded, `c1` has and
only has two distinct values: ['foo', null], and the predicate is `c1 not in
('foo', 'bar')`.
Now dictionary filter may skip this row-group that is actually should not be
skipped, because there are nulls in the column.
This is a bug similar to #1510.
was:
Dictionary filter may skip row-groups incorrectly when evaluating `notIn` on
optional columns with null values. Here is an example:
Say there is a optional column `c1` with all pages dict encoded, `c1` has and
only has two distinct values: ['foo', null], and the predicate is `c1 not in
('foo', 'bar')`.
Now dictionary filter may skip this row-group that is actually should not be
skipped, because there are nulls in the column.
> Dictionary filter may skip row-groups incorrectly when evaluating notIn
> -----------------------------------------------------------------------
>
> Key: PARQUET-2244
> URL: https://issues.apache.org/jira/browse/PARQUET-2244
> Project: Parquet
> Issue Type: Bug
> Components: parquet-mr
> Affects Versions: 1.12.2
> Reporter: Yujiang Zhong
> Priority: Major
>
> Dictionary filter may skip row-groups incorrectly when evaluating `notIn` on
> optional columns with null values. Here is an example:
> Say there is a optional column `c1` with all pages dict encoded, `c1` has and
> only has two distinct values: ['foo', null], and the predicate is `c1 not
> in ('foo', 'bar')`.
> Now dictionary filter may skip this row-group that is actually should not be
> skipped, because there are nulls in the column.
>
> This is a bug similar to #1510.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
