[jira] [Created] (FLINK-21389) ParquetInputFormat should not need parquet schema as user input

[Shang Yuanchun (Jira)]

Etienne Chauchot created FLINK-21389:
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             Summary: ParquetInputFormat should not need parquet schema as user input
                 Key: FLINK-21389
                 URL: https://issues.apache.org/jira/browse/FLINK-21389
             Project: Flink
          Issue Type: Improvement
            Reporter: Etienne Chauchot


_ParquetInputFormat_ takes parquet schema as user input but after split it reads the parquet schema again here [https://github.com/apache/flink/blob/52dcf439bb0b8d613fff1efecf015052d5b3a10b/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/ParquetInputFormat.java#L170]
 it should read the provided user schema.
 But better would be to read the schema automatically and not require the user to provide a schema as spark does ([https://spark.apache.org/docs/latest/sql-data-sources-parquet.html]).
 Thus we could add a _ParquetInputFormat_ constructor and allow _ParquetTableSource_ with no schema parameter



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