MaxGekk opened a new pull request #24425: [WIP][SPARK-27528][SQL] Use Parquet logical type TIMESTAMP_MICROS by default URL: https://github.com/apache/spark/pull/24425 ## What changes were proposed in this pull request? In the PR, I propose to use the `TIMESTAMP_MICROS` logical type for timestamps written to parquet files. The type matches semantically to Catalyst's `TimestampType`, and stores microseconds since epoch in UTC time zone. This will allow to avoid conversions of microseconds to nanoseconds and to Julian calendar. Also this will reduce sizes of written parquet files. ## How was this patch tested? By existing test suites.
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