[SPARK-51359][CORE][SQL] Set INT64 as the default timestamp type for Parquet files #50215
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What changes were proposed in this pull request?
Changes done to set INT64 as the default timestamp type for Parquet files.
Why are the changes needed?
The INT96 timestamp type has been deprecated as part of PARQUET-323. However, Apache Spark still uses INT96 as the default outputTimestampType for Parquet files (code link). This could create incompatibilities when Parquet data written by Spark is read by readers that do not support the INT96 type. We should consider changing the default timestamp type to INT64 in future versions.
Does this PR introduce any user-facing change?
The default timestamp type for Parquet files will be changed to INT64. Older versions of applications that support INT96 should enable the INT96 type by setting
spark.sql.parquet.int96AsTimestamptotrueandspark.sql.parquet.outputTimestampTypetoINT96.How was this patch tested?
Updated the unit tests in ParquetSchemaSuite and SQLConfSuite to reflect INT64 as the default timestamp type for Parquet files.
Was this patch authored or co-authored using generative AI tooling?