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https://issues.apache.org/jira/browse/SPARK-57822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Max Gekk updated SPARK-57822:
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Shepherd: Max Gekk
> Support Parquet predicate pushdown for nanosecond-precision timestamps
> ----------------------------------------------------------------------
>
> Key: SPARK-57822
> URL: https://issues.apache.org/jira/browse/SPARK-57822
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.3.0
> Reporter: Max Gekk
> Priority: Major
>
> This sub-task is part of the umbrella SPARK-56822 (timestamps with nanosecond
> precision).
> h2. Problem
> {{ParquetFilters}} (datasources/parquet/ParquetFilters.scala ~L149-152 and
> the filter builders) only defines {{ParquetTimestampMicrosType}} /
> {{ParquetTimestampMillisType}}; there is no {{TIMESTAMP(NANOS)}} arm, so
> predicates on nanosecond columns are never converted and every row group is
> scanned (silent, no error).
> h2. Goal
> Convert equality/range predicates on nanosecond timestamp columns into
> Parquet filters using epoch-nanos, enabling row-group skipping.
> h2. Scope
> Add a nanosecond timestamp type + value conversion in {{ParquetFilters}}
> (matching the file encoding written by {{TimestampNanosParquetOps}}); wire it
> into {{createFilter}}.
> h2. Acceptance criteria
> * Filters on nanosecond columns are pushed and prune row groups; results
> identical to no-pushdown.
> h2. Testing
> {{ParquetFilterSuite}}; {{ParquetTimestampNanosSuite}}.
> h2. Dependencies
> None - independent of the vectorized-read sub-task (separate code path).
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