investigation: automatic schema mapping for parquet file source

[wcy-fdu]

Recently we support parquet file source, for example:

CREATE table parquet_table(
     id int,
     name string,
)
WITH (
    connector = 's3_v2',
    match_pattern = '*.parquet',
    xxx,
) FORMAT PLAIN ENCODE PARQUET;

Since the parquet file itself has metadata that records its schema, perhaps we do not need to define the schema of the parquet source. We may pre-read the meta of a parquet file when create source. Open this issue for investigation.

[github-actions]

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[wcy-fdu]

Duplicate with tvf