Parquet: Reading & Writing
This lesson explains the theory behind reading and writing Parquet records and later demonstrates a Java example to read and write Parquet files.
We'll cover the following
Reading & Writing
Looking back at our schema, we can come up with maximum definition and repetition levels for the various fields in our record.
message Car {
required string make;
required int year;
repeated group part {
required string name;
optional int life;
repeated string oem;
}
}
The table below explains the rationale behind the maximum values for definition and repetition levels:
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