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https://issues.apache.org/jira/browse/SPARK-57568?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Max Gekk updated SPARK-57568:
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Description:
h2. What
Support {{TimeType}} in Parquet/ORC aggregate push-down (MIN/MAX/COUNT computed
from
file-footer statistics).
h2. Where
{{AggregatePushDownUtils}}
(sql/core/.../execution/datasources/AggregatePushDownUtils.scala, around line
153) builds a
columnar batch from file-footer statistics to answer pushed-down aggregates.
h2. Relationship to SPARK-54203
This area is gated at the row-to-columnar converter level by SPARK-54203
({{RowToColumnConverter.getConverterForType}} in
sql/core/src/main/scala/org/apache/spark/sql/execution/Columnar.scala), which
currently has
no {{TimeType}} case. Once SPARK-54203 lands, the work below becomes possible.
It may also
require TIME support in this component's own layer (Arrow type mapping,
Parquet/ORC logical
types, or Variant encoding).
h2. Acceptance criteria
* MIN/MAX/COUNT over a TIME column can be pushed down to Parquet and ORC and
returns correct
results.
* Tests added in the Parquet/ORC aggregate push-down suites.
> Support TimeType in Parquet/ORC aggregate push-down
> ---------------------------------------------------
>
> Key: SPARK-57568
> URL: https://issues.apache.org/jira/browse/SPARK-57568
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Max Gekk
> Priority: Major
>
> h2. What
> Support {{TimeType}} in Parquet/ORC aggregate push-down (MIN/MAX/COUNT
> computed from
> file-footer statistics).
> h2. Where
> {{AggregatePushDownUtils}}
> (sql/core/.../execution/datasources/AggregatePushDownUtils.scala, around line
> 153) builds a
> columnar batch from file-footer statistics to answer pushed-down aggregates.
> h2. Relationship to SPARK-54203
> This area is gated at the row-to-columnar converter level by SPARK-54203
> ({{RowToColumnConverter.getConverterForType}} in
> sql/core/src/main/scala/org/apache/spark/sql/execution/Columnar.scala), which
> currently has
> no {{TimeType}} case. Once SPARK-54203 lands, the work below becomes
> possible. It may also
> require TIME support in this component's own layer (Arrow type mapping,
> Parquet/ORC logical
> types, or Variant encoding).
> h2. Acceptance criteria
> * MIN/MAX/COUNT over a TIME column can be pushed down to Parquet and ORC and
> returns correct
> results.
> * Tests added in the Parquet/ORC aggregate push-down suites.
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