What exactly do you mean by "get schema from a parquet file"?
- If you are trying to inspect Parquet files, parquet-tools can be pretty neat: https://github.com/Parquet/parquet-mr/issues/321 - If you are trying to get Parquet schema of Parquet MessageType, you may resort to readFooterX() and readAllFootersX() utility methods in ParquetFileReader - If you are trying to get Spark SQL StructType schema out of a Parquet file, then the most convenient way is to load it as a DataFrame. However, "loading" it as a DataFrame doesn't mean we scan the whole file. Instead, we only try to do minimum metadata discovery work like schema discovery and schema merging.
Cheng On 9/1/15 7:07 PM, Hafiz Mujadid wrote:
Hi all! Is there any way to get schema from a parquet file without loading into dataframe? Thanks -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/Schema-From-parquet-file-tp24535.html Sent from the Apache Spark User List mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
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